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Aclaris Therapeutics, Inc.

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5041
SEC CIK
0001557746
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365

Last 12 months

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0 purchase rows · 1 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
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MonthPurchasesSales
Nov 202500
Dec 202500
Jan 202600
Feb 202600
Mar 202600
Apr 202601
May 202600
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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
June 24, 2019 Filed Jun 25, 2019 22:31 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 13,063 $4.52 $59,077.42
Disclosure

SEC source: 0001193805-19-000599 · e618533_4-aclaris.xml · nonDerivative · entry 3

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Special Situations Fund, L.P.

Disclosed balance after: 1,083,761

F4 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $4.50 to $4.67, inclusive.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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June 21, 2019 Filed Jun 25, 2019 22:31 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 269,402 $4.62 $1,243,397.99
Disclosure

SEC source: 0001193805-19-000599 · e618533_4-aclaris.xml · nonDerivative · entry 2

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 3,842,345

F1 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $4.50 to $4.89, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (4) and (5) of this Form 4.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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June 21, 2019 Filed Jun 25, 2019 22:31 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 70,135 $4.62 $323,701.08
Disclosure

SEC source: 0001193805-19-000599 · e618533_4-aclaris.xml · nonDerivative · entry 1

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Special Situations Fund, L.P.

Disclosed balance after: 1,096,824

F1 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $4.50 to $4.89, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (4) and (5) of this Form 4.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
June 06, 2019 Filed Jun 10, 2019 16:49 UTC GrantRestricted Stock Units · Derivative 7,333 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-035829 · doc4.xml · derivative · entry 1

SCHIFF ANDREW N · CIK 0001172252 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,333

Underlying: Common Stock · 7,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · shares: This grant was made pursuant to the issuer's amended and restated non-employee director compensation policy.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

Read SEC document
June 06, 2019 Filed Jun 10, 2019 20:56 UTC GrantRestricted Stock Units · Derivative 7,333 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-035840 · doc4.xml · derivative · entry 1

Humphries William D. · CIK 0001674278 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,333

Underlying: Common Stock · 7,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · shares: This grant was made pursuant to the issuer's amended and restated non-employee director compensation policy.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

Read SEC document
June 06, 2019 Filed Jun 10, 2019 16:51 UTC GrantRestricted Stock Units · Derivative 7,333 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-035832 · doc4.xml · derivative · entry 1

Powell Andrew Kenneth William · CIK 0001304113 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,333

Underlying: Common Stock · 7,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · shares: This grant was made pursuant to the issuer's amended and restated non-employee director compensation policy.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

Read SEC document
June 06, 2019 Filed Jun 10, 2019 16:50 UTC GrantRestricted Stock Units · Derivative 7,333 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-035830 · doc4.xml · derivative · entry 1

Reasons Bryan M. · CIK 0001553489 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,333

Underlying: Common Stock · 7,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · shares: This grant was made pursuant to the issuer's amended and restated non-employee director compensation policy.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

Read SEC document
June 06, 2019 Filed Jun 10, 2019 21:47 UTC
Mehra AnandDirector
GrantRestricted Stock Units · Derivative 7,333 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-035916 · doc4.xml · derivative · entry 1

Mehra Anand · CIK 0001590102 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,333

Underlying: Common Stock · 7,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · shares: This grant was made pursuant to the issuer's amended and restated non-employee director compensation policy.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

Read SEC document
June 06, 2019 Filed Jun 10, 2019 20:52 UTC GrantRestricted Stock Units · Derivative 7,333 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-035835 · doc4.xml · derivative · entry 1

Molineaux Christopher P. · CIK 0001654773 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,333

Underlying: Common Stock · 7,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · shares: This grant was made pursuant to the issuer's amended and restated non-employee director compensation policy.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest on June 6, 2020, subject to the Reporting Person's continuous service with the issuer as of the vesting date.

Read SEC document
May 10, 2019 Filed May 13, 2019 21:24 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 71,869 $6.05 $434,749.95
Disclosure

SEC source: 0001193805-19-000485 · e618447_4-aclaris.xml · nonDerivative · entry 4

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Special Situations Fund, L.P.

Disclosed balance after: 1,166,959

F4 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $6.00 to $6.12, inclusive.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
May 10, 2019 Filed May 13, 2019 21:24 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 108,696 $6.05 $657,523.84
Disclosure

SEC source: 0001193805-19-000485 · e618447_4-aclaris.xml · nonDerivative · entry 3

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 4,111,747

F4 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $6.00 to $6.12, inclusive.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
May 09, 2019 Filed May 13, 2019 21:24 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 172,800 $6.16 $1,064,016.00
Disclosure

SEC source: 0001193805-19-000485 · e618447_4-aclaris.xml · nonDerivative · entry 2

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Special Situations Fund, L.P.

Disclosed balance after: 1,238,828

F1 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $6.00 to $6.61, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (4) of this Form 4.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
May 09, 2019 Filed May 13, 2019 21:24 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
SaleCommon Stock 261,345 $6.16 $1,609,231.84
Disclosure

SEC source: 0001193805-19-000485 · e618447_4-aclaris.xml · nonDerivative · entry 1

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 4,220,443

F1 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $6.00 to $6.61, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) and (4) of this Form 4.

F2 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F3 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
March 01, 2019 Filed Mar 4, 2019 18:09 UTC
Shanler StuartChief Scientific Officer
GrantRestricted stock units · Derivative 82,200 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-015882 · doc4.xml · derivative · entry 1

Shanler Stuart · CIK 0001654332 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,200

Underlying: Common Stock · 82,200 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

F2 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
March 01, 2019 Filed Mar 4, 2019 23:13 UTC
Ali-Jackson KamilChief Legal Officer
GrantRestricted stock units · Derivative 68,700 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-015898 · doc4.xml · derivative · entry 1

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,700

Underlying: Common Stock · 68,700 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

F2 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
March 01, 2019 Filed Mar 4, 2019 23:12 UTC
Walker NealDirector · President and CEO
GrantRestricted stock units · Derivative 384,600 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-015894 · doc4.xml · derivative · entry 1

Walker Neal · CIK 0001604457 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 384,600

Underlying: Common Stock · 384,600 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

F2 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
March 01, 2019 Filed Mar 4, 2019 23:10 UTC
Gordon David N.Chief Medical Officer
GrantRestricted stock units · Derivative 82,400 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-015888 · doc4.xml · derivative · entry 1

Gordon David N. · CIK 0001751167 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,400

Underlying: Common Stock · 82,400 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

F2 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
March 01, 2019 Filed Mar 4, 2019 23:11 UTC
Ruffo FrankChief Financial Officer
GrantRestricted stock units · Derivative 103,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-015892 · doc4.xml · derivative · entry 1

Ruffo Frank · CIK 0001654450 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 103,000

Underlying: Common Stock · 103,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

F2 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

F2 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on March 1, 2020, subject to the Reporting Person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 18:32 UTC
Shanler StuartChief Scientific Officer
Exercise / conversionRestricted Stock Units · Derivative 3,875 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-007488 · doc4.xml · derivative · entry 3

Shanler Stuart · CIK 0001654332 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,625

Underlying: Common Stock · 3,875 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 18:32 UTC
Shanler StuartChief Scientific Officer
Tax withholdingCommon Stock 1,308 $6.96 $9,103.68
Disclosure

SEC source: 0001209191-19-007488 · doc4.xml · nonDerivative · entry 2

Shanler Stuart · CIK 0001654332 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 272,047

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 18:32 UTC
Shanler StuartChief Scientific Officer
Exercise / conversionCommon Stock 3,875 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-19-007488 · doc4.xml · nonDerivative · entry 1

Shanler Stuart · CIK 0001654332 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 273,355

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 18:33 UTC
Powala ChristopherChief Reg & Develop Officer
Exercise / conversionRestricted Stock Units · Derivative 3,400 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-007489 · doc4.xml · derivative · entry 4

Powala Christopher · CIK 0001654301 · Chief Reg & Develop Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,200

Underlying: Common Stock · 3,400 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F4 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F4 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 18:33 UTC
Powala ChristopherChief Reg & Develop Officer
Tax withholdingCommon Stock 1,114 $6.96 $7,753.44
Disclosure

SEC source: 0001209191-19-007489 · doc4.xml · nonDerivative · entry 2

Powala Christopher · CIK 0001654301 · Chief Reg & Develop Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 141,729

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 18:33 UTC
Powala ChristopherChief Reg & Develop Officer
Exercise / conversionCommon Stock 3,400 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-19-007489 · doc4.xml · nonDerivative · entry 1

Powala Christopher · CIK 0001654301 · Chief Reg & Develop Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 142,843

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:29 UTC
Ali-Jackson KamilChief Legal Officer
Exercise / conversionRestricted Stock Units · Derivative 3,875 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-007485 · doc4.xml · derivative · entry 3

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,625

Underlying: Common Stock · 3,875 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:29 UTC
Ali-Jackson KamilChief Legal Officer
Tax withholdingCommon Stock 1,308 $6.96 $9,103.68
Disclosure

SEC source: 0001209191-19-007485 · doc4.xml · nonDerivative · entry 2

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,212

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:29 UTC
Ali-Jackson KamilChief Legal Officer
Exercise / conversionCommon Stock 3,875 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-19-007485 · doc4.xml · nonDerivative · entry 1

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,520

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:34 UTC
Walker NealDirector · President and CEO
Exercise / conversionRestricted Stock Units · Derivative 10,800 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-007490 · doc4.xml · derivative · entry 3

Walker Neal · CIK 0001604457 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,400

Underlying: Common Stock · 10,800 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:34 UTC
Walker NealDirector · President and CEO
Tax withholdingCommon Stock 3,579 $6.96 $24,909.84
Disclosure

SEC source: 0001209191-19-007490 · doc4.xml · nonDerivative · entry 2

Walker Neal · CIK 0001604457 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 917,345

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:34 UTC
Walker NealDirector · President and CEO
Exercise / conversionCommon Stock 10,800 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-19-007490 · doc4.xml · nonDerivative · entry 1

Walker Neal · CIK 0001604457 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 920,924

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:31 UTC
Ruffo FrankChief Financial Officer
Exercise / conversionRestricted Stock Units · Derivative 3,875 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-007487 · doc4.xml · derivative · entry 3

Ruffo Frank · CIK 0001654450 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,625

Underlying: Common Stock · 3,875 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:31 UTC
Ruffo FrankChief Financial Officer
Tax withholdingCommon Stock 1,308 $6.96 $9,103.68
Disclosure

SEC source: 0001209191-19-007487 · doc4.xml · nonDerivative · entry 2

Ruffo Frank · CIK 0001654450 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,976

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:31 UTC
Ruffo FrankChief Financial Officer
Exercise / conversionCommon Stock 3,875 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-19-007487 · doc4.xml · nonDerivative · entry 1

Ruffo Frank · CIK 0001654450 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,284

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:30 UTC
Fair BrettChief Commercial Officer
Exercise / conversionRestricted Stock Units · Derivative 3,875 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-007486 · doc4.xml · derivative · entry 3

Fair Brett · CIK 0001737277 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,625

Underlying: Common Stock · 3,875 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: The shares underlying these restricted stock units vest in four equal annual installments beginning on February 1, 2019, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:30 UTC
Fair BrettChief Commercial Officer
Tax withholdingCommon Stock 1,308 $6.96 $9,103.68
Disclosure

SEC source: 0001209191-19-007486 · doc4.xml · nonDerivative · entry 2

Fair Brett · CIK 0001737277 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,582

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

Read SEC document
February 01, 2019 Filed Feb 5, 2019 23:30 UTC
Fair BrettChief Commercial Officer
Exercise / conversionCommon Stock 3,875 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-19-007486 · doc4.xml · nonDerivative · entry 1

Fair Brett · CIK 0001737277 · Chief Commercial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,890

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

Read SEC document
January 15, 2019 Filed Jan 18, 2019 19:55 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.93 Not disclosed
Disclosure

SEC source: 0001193805-19-000067 · e618155_4-aclaris.xml · derivative · entry 5

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 48,254 shares

Expires 2022-01-19

F6 · security: On January 15, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 48,254 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F7 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the swap agreement. The reference prices applicable to the 48,254 notional shares subject to the swap agreement reported herein range from $6.79 to $7.00, inclusive.

F6 · shares: On January 15, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 48,254 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F6 · price: On January 15, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 48,254 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F6 · derivative.exercise_date: On January 15, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 48,254 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
January 14, 2019 Filed Jan 18, 2019 19:55 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.97 Not disclosed
Disclosure

SEC source: 0001193805-19-000067 · e618155_4-aclaris.xml · derivative · entry 4

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 61,789 shares

Expires 2022-01-19

F4 · security: On January 14, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 61,789 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F5 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the swap agreement. The reference prices applicable to the 61,789 notional shares subject to the swap agreement reported herein range from $6.85 to $7.00, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of notional shares subject to each separate reference price within the ranges set forth in footnotes (5) and (7) of this Form 4.

F4 · shares: On January 14, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 61,789 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F4 · price: On January 14, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 61,789 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F4 · derivative.exercise_date: On January 14, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 61,789 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
January 11, 2019 Filed Jan 18, 2019 19:55 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $7.00 Not disclosed
Disclosure

SEC source: 0001193805-19-000067 · e618155_4-aclaris.xml · derivative · entry 3

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 1,851 shares

Expires 2022-01-19

F3 · security: On January 11, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 1,851 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference price, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · shares: On January 11, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 1,851 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference price, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · price: On January 11, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 1,851 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference price, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · derivative.exercise_date: On January 11, 2019, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 1,851 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference price, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 28, 2018 Filed Jan 2, 2019 22:33 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $7.00 Not disclosed
Disclosure

SEC source: 0001193805-19-000014 · e618134_4-aclaris.xml · derivative · entry 3

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 14,200 shares

Expires 2022-01-19

F3 · security: On December 28, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 14,200 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F4 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the swap agreement. The reference prices applicable to the 14,200 notional shares subject to the swap agreement reported herein range from $6.98 to $7.00, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of notional shares subject to each separate reference price within the range set forth in this footnote (4).

F3 · shares: On December 28, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 14,200 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · price: On December 28, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 14,200 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · derivative.exercise_date: On December 28, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 14,200 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 27, 2018 Filed Dec 28, 2018 00:07 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.89 Not disclosed
Disclosure

SEC source: 0001193805-18-001441 · e618118_4-aclaris.xml · derivative · entry 5

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 216,159 shares

Expires 2022-01-19

F7 · security: On December 27, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 216,159 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F8 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the applicable swap agreement. The reference prices applicable to 216,159 notional shares subject to the swap agreement range from $6.73 to $7.00, inclusive.

F7 · shares: On December 27, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 216,159 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F7 · price: On December 27, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 216,159 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F7 · derivative.exercise_date: On December 27, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 216,159 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 26, 2018 Filed Dec 28, 2018 00:07 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.86 Not disclosed
Disclosure

SEC source: 0001193805-18-001441 · e618118_4-aclaris.xml · derivative · entry 4

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 27,128 shares

Expires 2022-01-19

F5 · security: On December 26, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 27,128 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F6 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the applicable swap agreement. The reference prices applicable to 27,128 notional shares subject to the swap agreement range from $6.83 to $7.00, inclusive.

F5 · shares: On December 26, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 27,128 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F5 · price: On December 26, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 27,128 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F5 · derivative.exercise_date: On December 26, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 27,128 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 24, 2018 Filed Dec 28, 2018 00:07 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.92 Not disclosed
Disclosure

SEC source: 0001193805-18-001441 · e618118_4-aclaris.xml · derivative · entry 3

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 260,661 shares

Expires 2022-01-19

F3 · security: On December 24, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 260,661 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F4 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the applicable swap agreement. The reference prices applicable to 260,661 notional shares subject to the swap agreement range from $6.80 to $6.95, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of notional shares subject to each separate reference price within the ranges set forth in footnotes (4), (6) and (8) of this Form 4.

F3 · shares: On December 24, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 260,661 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · price: On December 24, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 260,661 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · derivative.exercise_date: On December 24, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 260,661 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 21, 2018 Filed Dec 22, 2018 00:16 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.95 Not disclosed
Disclosure

SEC source: 0001193805-18-001435 · e618114_4-aclaris.xml · derivative · entry 5

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 410,511 shares

Expires 2022-01-19

F7 · security: On December 21, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 410,511 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F8 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the applicable swap agreement. The reference prices applicable to 410,511 notional shares subject to the swap agreement range from $6.765 to 7.00, inclusive.

F7 · shares: On December 21, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 410,511 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F7 · price: On December 21, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 410,511 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F7 · derivative.exercise_date: On December 21, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 410,511 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 20, 2018 Filed Dec 22, 2018 00:16 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.84 Not disclosed
Disclosure

SEC source: 0001193805-18-001435 · e618114_4-aclaris.xml · derivative · entry 4

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 190,502 shares

Expires 2022-01-19

F5 · security: On December 20, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 190,502 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F6 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the applicable swap agreement. The reference prices applicable to 190,502 notional shares subject to the swap agreement range from $6.72 to $6.90, inclusive.

F5 · shares: On December 20, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 190,502 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F5 · price: On December 20, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 190,502 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F5 · derivative.exercise_date: On December 20, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 190,502 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 19, 2018 Filed Dec 22, 2018 00:16 UTC
Flynn James E10% owner
Deerfield Special Situations Fund, L.P.Possible Member of a 10% Group
OtherCash-Settled Total Return Swap · Derivative 1 Not disclosed Strike: $6.91 Not disclosed
Disclosure

SEC source: 0001193805-18-001435 · e618114_4-aclaris.xml · derivative · entry 3

Flynn James E · CIK 0001352546 · 10% owner

Deerfield Mgmt L.P. · CIK 0001010823 · 10% owner

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) · CIK 0001009258 · 10% owner

Deerfield Special Situations Fund, L.P. · CIK 0001354395 · Possible Member of a 10% Group

DEERFIELD PARTNERS, L.P. · CIK 0001301041 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through Deerfield Partners, L.P.

Disclosed balance after: 1

Underlying: Common Stock · 194,207 shares

Expires 2022-01-19

F3 · security: On December 19, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 194,207 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F4 · derivative.exercise_price: The price reported in Column 2 represents a weighted average reference price associated with the applicable swap agreement. The reference prices applicable to 194,207 notional shares subject to the swap agreement range from $6.45 to $7.00, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of notional shares subject to each separate reference price within the ranges set forth in footnotes (4), (6) and (8) of this Form 4.

F3 · shares: On December 19, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 194,207 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · price: On December 19, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 194,207 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F3 · derivative.exercise_date: On December 19, 2018, Deerfield Partners entered into a cash-settled total return swap agreement with an unaffiliated third party financial institution, which provides Deerfield Partners with economic exposure to an aggregate of 194,207 notional shares. The swap agreement provides Deerfield Partners with economic results that are comparable to the economic results of ownership of, based on the applicable reference prices, but does not provide Deerfield Partners with the power to vote or direct the voting of, or dispose of or direct the disposition of, the shares of common stock that are the subject of such swap agreement.

F1 · ownership.nature: This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of Deerfield Partners, L.P. ("Deerfield Partners") and Deerfield Special Situations Fund, L.P. (collectively with Deerfield Partners, the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.

F2 · ownership.nature: In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

Read SEC document
December 18, 2018 Filed Dec 21, 2018 02:59 UTC
Ali-Jackson KamilChief Legal Officer
Exercise / conversionRestricted Stock Units · Derivative 1,075 $0.00 $0.00
Disclosure

SEC source: 0001209191-18-063795 · doc4.xml · derivative · entry 3

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,075

Underlying: Common Stock · 1,075 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On December 18, 2015, the reporting person was granted 4,300 restricted stock units, vesting in four equal annual installments beginning on December 18, 2016, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: On December 18, 2015, the reporting person was granted 4,300 restricted stock units, vesting in four equal annual installments beginning on December 18, 2016, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

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December 18, 2018 Filed Dec 21, 2018 02:59 UTC
Ali-Jackson KamilChief Legal Officer
Tax withholdingCommon Stock 306 $6.30 $1,927.80
Disclosure

SEC source: 0001209191-18-063795 · doc4.xml · nonDerivative · entry 2

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,645

F2 · kind: The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting and settlement of the restricted stock units being reported in this Form 4.

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December 18, 2018 Filed Dec 21, 2018 02:59 UTC
Ali-Jackson KamilChief Legal Officer
Exercise / conversionCommon Stock 1,075 Not disclosed Not disclosed
Disclosure

SEC source: 0001209191-18-063795 · doc4.xml · nonDerivative · entry 1

Ali-Jackson Kamil · CIK 0001654337 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,951

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

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December 18, 2018 Filed Dec 21, 2018 07:32 UTC
Shanler StuartChief Scientific Officer
Exercise / conversionRestricted Stock Units · Derivative 1,450 $0.00 $0.00
Disclosure

SEC source: 0001209191-18-063803 · doc4.xml · derivative · entry 3

Shanler Stuart · CIK 0001654332 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,450

Underlying: Common Stock · 1,450 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On December 18, 2015, the reporting person was granted 5,800 restricted stock units, vesting in four equal annual installments beginning on December 18, 2016, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

F3 · derivative.expiration_date: On December 18, 2015, the reporting person was granted 5,800 restricted stock units, vesting in four equal annual installments beginning on December 18, 2016, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.