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Rock Springs Capital Management LP

Disclosed activity across 8 companies

Tapewire entity
117967
SEC CIK
0001595725

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Tempest Therapeutics, Inc.TPST · Entity 773410% ownerDecember 30, 2021January 10, 2022

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Tempest Therapeutics, Inc.

Report date December 30, 2021 · Filed January 10, 2022

Jointly reported with Rock Springs Capital LLC, Rock Springs Capital Master Fund LP

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee footnote750,000 Reported balance Holding disclosure · report date 2021-12-30 · row 1 Holding and transaction disclosures are not merged.
1 source row

Row 1 · Balance 750,000

F1: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee footnote73,654 Reported balance Holding disclosure · report date 2021-12-30 · row 2 Holding and transaction disclosures are not merged.
1 source row

Row 2 · Balance 73,654

F2: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Four Pines.

Filing footnotes · ownership attribution and instrument terms

F1: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

F2: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Four Pines.

Past disclosures · reporting ended (7)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

Atea Pharmaceuticals, Inc.

Report date November 03, 2020 · Filed November 04, 2020

Jointly reported with Rock Springs Capital Master Fund LP, Rock Springs Capital LLC

Section 16 reporting ended · disclosed 2020-11-04. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee Footnote1,412,016 Reported balance After 2020-11-03 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2020-11-03 · Conversion · Acquired 1,412,016 · Balance 1,412,016

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee Footnote282,403 Reported balance After 2020-11-03 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 2 · 2020-11-03 · Conversion · Acquired 282,403 · Balance 282,403

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Common StockSEC Table I · non-derivativeIndirectSee Footnote1,654,724 Reported balance After 2020-11-03 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 3 · 2020-11-03 · Purchase · Acquired 242,708 · Balance 1,654,724

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee Footnote289,695 Reported balance After 2020-11-03 transaction · row 4 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 4 · 2020-11-03 · Purchase · Acquired 7,292 · Balance 289,695

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Series D Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2020-11-03 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2020-11-03 · Conversion · Disposed 890,313 · Balance 0

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Series D Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2020-11-03 transaction · row 7 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 7 · 2020-11-03 · Conversion · Disposed 178,063 · Balance 0

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Series D-1 Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2020-11-03 transaction · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · 2020-11-03 · Conversion · Disposed 521,703 · Balance 0

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Series D-1 Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2020-11-03 transaction · row 8 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 8 · 2020-11-03 · Conversion · Disposed 104,340 · Balance 0

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Filing footnotes · ownership attribution and instrument terms

F1: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Enliven Therapeutics, Inc.

Report date March 16, 2020 · Filed March 16, 2020

Jointly reported with Rock Springs Capital Master Fund LP, Rock Springs Capital LLC

Section 16 reporting ended · disclosed 2020-03-16. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee footnote523,411 Last balance in matching sequence After 2020-03-16 transaction · row 2 Source-order balances reconcile. Account continuity and personal attribution are not independently verified.
2 source rows

Row 1 · 2020-03-16 · Conversion · Acquired 273,411 · Balance 273,411

F1: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Row 2 · 2020-03-16 · Purchase · Acquired 250,000 · Balance 523,411

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Series B Preferred StockSEC Table II · derivative / convertible securityIndirectSee footnote0 Reported balance After 2020-03-16 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2020-03-16 · Conversion · Disposed 1,722,222 · Balance 0

F1: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Filing footnotes · ownership attribution and instrument terms

F1: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Inozyme Pharma, Inc.

Report date July 28, 2020 · Filed July 28, 2020

Jointly reported with Rock Springs Capital Master Fund LP, Rock Springs Capital LLC

Section 16 reporting ended · disclosed 2020-07-28. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee footnote467,884 Reported balance After 2020-07-28 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2020-07-28 · Conversion · Acquired 467,884 · Balance 467,884

F1: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee footnote1,043,884 Reported balance After 2020-07-28 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 2 · 2020-07-28 · Purchase · Acquired 576,000 · Balance 1,043,884

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee footnote1,067,884 Reported balance After 2020-07-28 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 3 · 2020-07-28 · Purchase · Acquired 24,000 · Balance 1,067,884

F3: The securities reported herein are held of record by Four Pines Master Fund LP. RSC is the general partner of RSCM which is the investment manager to Four Pines Master Fund LP. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Four Pines Master Fund LP.

Series A-2 Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee footnote0 Reported balance After 2020-07-28 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2020-07-28 · Conversion · Disposed 3,496,504 · Balance 0

F1: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Filing footnotes · ownership attribution and instrument terms

F1: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

F3: The securities reported herein are held of record by Four Pines Master Fund LP. RSC is the general partner of RSCM which is the investment manager to Four Pines Master Fund LP. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Four Pines Master Fund LP.

Q32 Bio Inc.

Report date April 02, 2018 · Filed April 04, 2018

Jointly reported with Rock Springs Capital Master Fund LP, Rock Springs Capital LLC

Section 16 reporting ended · disclosed 2018-04-04. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee footnote645,845 Last balance in matching sequence After 2018-04-02 transaction · row 2 Source-order balances reconcile. Account continuity and personal attribution are not independently verified.
2 source rows

Row 1 · 2018-04-02 · Conversion · Acquired 395,845 · Balance 395,845

F1: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

Row 2 · 2018-04-02 · Purchase · Acquired 250,000 · Balance 645,845

F1: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

Series B Preferred StockSEC Table II · derivative / convertible securityIndirectSee footnote0 Reported balance After 2018-04-02 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2018-04-02 · Conversion · Disposed 395,845 · Balance 0

F2: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock.

F1: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

Filing footnotes · ownership attribution and instrument terms

F1: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

F2: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock.

Theseus Pharmaceuticals, Inc.

Report date October 12, 2021 · Filed October 14, 2021

Jointly reported with Rock Springs Capital Master Fund LP, Rock Springs Capital LLC

Section 16 reporting ended · disclosed 2021-10-14. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee Footnote349,320 Reported balance After 2021-10-12 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2021-10-12 · Conversion · Acquired 349,320 · Balance 349,320

F1: The total represents shares received upon conversion of shares of Series B Convertible Preferred Stock.

F2: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F3: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee Footnote87,329 Reported balance After 2021-10-12 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 2 · 2021-10-12 · Conversion · Acquired 87,329 · Balance 87,329

F1: The total represents shares received upon conversion of shares of Series B Convertible Preferred Stock.

F2: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F4: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Common StockSEC Table I · non-derivativeIndirectSee Footnote599,320 Reported balance After 2021-10-12 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 3 · 2021-10-12 · Purchase · Acquired 250,000 · Balance 599,320

F5: Represents shares purchased in the issuer's initial public offering.

F3: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Series B Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2021-10-12 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2021-10-12 · Conversion · Disposed 349,320 · Balance 0

F2: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F3: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Series B Convertible Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2021-10-12 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2021-10-12 · Conversion · Disposed 87,329 · Balance 0

F2: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F4: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Filing footnotes · ownership attribution and instrument terms

F1: The total represents shares received upon conversion of shares of Series B Convertible Preferred Stock.

F2: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F3: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

F4: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

F5: Represents shares purchased in the issuer's initial public offering.

Verve Therapeutics, Inc.

Report date June 21, 2021 · Filed June 22, 2021

Jointly reported with Rock Springs Capital Master Fund LP, Rock Springs Capital LLC

Section 16 reporting ended · disclosed 2021-06-22. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee Footnote556,298 Reported balance After 2021-06-21 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2021-06-21 · Conversion · Acquired 556,298 · Balance 556,298

F1: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee Footnote926,298 Reported balance After 2021-06-21 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 2 · 2021-06-21 · Purchase · Acquired 370,000 · Balance 926,298

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee Footnote152,926 Reported balance After 2021-06-21 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 3 · 2021-06-21 · Conversion · Acquired 152,926 · Balance 152,926

F1: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Series B Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2021-06-21 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2021-06-21 · Conversion · Disposed 5,151,043 · Balance 0

F1: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Series B Preferred StockSEC Table II · derivative / convertible securityIndirectSee Footnote0 Reported balance After 2021-06-21 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2021-06-21 · Conversion · Disposed 1,416,023 · Balance 0

F1: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Filing footnotes · ownership attribution and instrument terms

F1: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Xilio Therapeutics, Inc.

Report date October 26, 2021 · Filed October 26, 2021

Jointly reported with Rock Springs Capital LLC, Rock Springs Capital Master Fund LP, Four Pines Master Fund LP

Section 16 reporting ended · disclosed 2021-10-26. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee footnote756,472 Reported balance After 2021-10-26 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2021-10-26 · Conversion · Acquired 756,472 · Balance 756,472

F1: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Common StockSEC Table I · non-derivativeIndirectSee footnote151,294 Reported balance After 2021-10-26 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 2 · 2021-10-26 · Conversion · Acquired 151,294 · Balance 151,294

F1: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Common StockSEC Table I · non-derivativeIndirectSee footnote1,256,472 Reported balance After 2021-10-26 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 3 · 2021-10-26 · Purchase · Acquired 500,000 · Balance 1,256,472

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Series C Preferred StockSEC Table II · derivative / convertible securityIndirectSee footnote0 Reported balance After 2021-10-26 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2021-10-26 · Conversion · Disposed 7,186,490 · Balance 0

F1: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Series C Preferred StockSEC Table II · derivative / convertible securityIndirectSee footnote0 Reported balance After 2021-10-26 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2021-10-26 · Conversion · Disposed 1,437,297 · Balance 0

F1: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Filing footnotes · ownership attribution and instrument terms

F1: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F2: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

F3: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Transaction history

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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 dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 26, 2021 Filed Oct 26, 2021 21:04 UTC Xilio Therapeutics, Inc. XLO · Entity 7122 ConversionSeries C Preferred Stock · Derivative 1,437,297 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-21-130031 · tm2130646-27_4seq1.xml · derivative · entry 5

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Four Pines Master Fund LP · CIK 0001888685 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 151,294 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: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F1 · price: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Read SEC document
October 26, 2021 Filed Oct 26, 2021 21:04 UTC Xilio Therapeutics, Inc. XLO · Entity 7122 ConversionSeries C Preferred Stock · Derivative 7,186,490 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-21-130031 · tm2130646-27_4seq1.xml · derivative · entry 4

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Four Pines Master Fund LP · CIK 0001888685 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 756,472 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: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F1 · price: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
October 26, 2021 Filed Oct 26, 2021 21:04 UTC Xilio Therapeutics, Inc. XLO · Entity 7122 PurchaseCommon Stock 500,000 $16.00 $8,000,000.00
Disclosure

SEC source: 0001104659-21-130031 · tm2130646-27_4seq1.xml · nonDerivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Four Pines Master Fund LP · CIK 0001888685 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,256,472

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
October 26, 2021 Filed Oct 26, 2021 21:04 UTC Xilio Therapeutics, Inc. XLO · Entity 7122 ConversionCommon Stock 151,294 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-21-130031 · tm2130646-27_4seq1.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Four Pines Master Fund LP · CIK 0001888685 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 151,294

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: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Read SEC document
October 26, 2021 Filed Oct 26, 2021 21:04 UTC Xilio Therapeutics, Inc. XLO · Entity 7122 ConversionCommon Stock 756,472 Not disclosed Not disclosed
Disclosure

SEC source: 0001104659-21-130031 · tm2130646-27_4seq1.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Four Pines Master Fund LP · CIK 0001888685 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 756,472

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: The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
October 12, 2021 Filed Oct 14, 2021 17:00 UTC Theseus Pharmaceuticals, Inc. THRX · Entity 94301 ConversionSeries B Convertible Preferred Stock · Derivative 87,329 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-040255 · doc4.xml · derivative · entry 5

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 87,329 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.

F2 · derivative.exercise_price: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F2 · price: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F2 · derivative.exercise_date: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F2 · derivative.expiration_date: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F4 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Read SEC document
October 12, 2021 Filed Oct 14, 2021 17:00 UTC Theseus Pharmaceuticals, Inc. THRX · Entity 94301 ConversionSeries B Convertible Preferred Stock · Derivative 349,320 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-040255 · doc4.xml · derivative · entry 4

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 349,320 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.

F2 · derivative.exercise_price: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F2 · price: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F2 · derivative.exercise_date: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F2 · derivative.expiration_date: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F3 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
October 12, 2021 Filed Oct 14, 2021 17:00 UTC Theseus Pharmaceuticals, Inc. THRX · Entity 94301 PurchaseCommon Stock 250,000 $16.00 $4,000,000.00
Disclosure

SEC source: 0000899243-21-040255 · doc4.xml · nonDerivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 599,320

F5 · kind: Represents shares purchased in the issuer's initial public offering.

F3 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
October 12, 2021 Filed Oct 14, 2021 17:00 UTC Theseus Pharmaceuticals, Inc. THRX · Entity 94301 ConversionCommon Stock 87,329 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-040255 · doc4.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 87,329

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 · kind: The total represents shares received upon conversion of shares of Series B Convertible Preferred Stock.

F2 · price: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F4 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Read SEC document
October 12, 2021 Filed Oct 14, 2021 17:00 UTC Theseus Pharmaceuticals, Inc. THRX · Entity 94301 ConversionCommon Stock 349,320 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-040255 · doc4.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 349,320

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 · kind: The total represents shares received upon conversion of shares of Series B Convertible Preferred Stock.

F2 · price: The reported security converted into the issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the issuer's initial public offering without payment of further consideration. The shares have no expiration date.

F3 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
June 21, 2021 Filed Jun 22, 2021 17:20 UTC Verve Therapeutics, Inc. VERV · Entity 11259 ConversionSeries B Preferred Stock · Derivative 1,416,023 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-025312 · doc4.xml · derivative · entry 5

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 152,926 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: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F1 · price: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Read SEC document
June 21, 2021 Filed Jun 22, 2021 17:20 UTC Verve Therapeutics, Inc. VERV · Entity 11259 ConversionSeries B Preferred Stock · Derivative 5,151,043 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-025312 · doc4.xml · derivative · entry 4

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 556,298 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: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F1 · price: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F1 · derivative.exercise_date: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
June 21, 2021 Filed Jun 22, 2021 17:20 UTC Verve Therapeutics, Inc. VERV · Entity 11259 ConversionCommon Stock 152,926 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-025312 · doc4.xml · nonDerivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 152,926

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: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.

Read SEC document
June 21, 2021 Filed Jun 22, 2021 17:20 UTC Verve Therapeutics, Inc. VERV · Entity 11259 PurchaseCommon Stock 370,000 $19.00 $7,030,000.00
Disclosure

SEC source: 0000899243-21-025312 · doc4.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 926,298

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
June 21, 2021 Filed Jun 22, 2021 17:20 UTC Verve Therapeutics, Inc. VERV · Entity 11259 ConversionCommon Stock 556,298 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-21-025312 · doc4.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 556,298

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: The Series B Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on an approximately 9.2595:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series B Preferred Stock had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 ConversionSeries D-1 Convertible Preferred Stock · Derivative 104,340 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · derivative · entry 8

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 104,340 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: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · price: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.exercise_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.expiration_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 ConversionSeries D Convertible Preferred Stock · Derivative 178,063 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · derivative · entry 7

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 178,063 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: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · price: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.exercise_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.expiration_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 ConversionSeries D-1 Convertible Preferred Stock · Derivative 521,703 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · derivative · entry 6

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 521,703 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: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · price: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.exercise_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.expiration_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 ConversionSeries D Convertible Preferred Stock · Derivative 890,313 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · derivative · entry 5

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 890,313 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: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · price: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.exercise_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F1 · derivative.expiration_date: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 PurchaseCommon Stock 7,292 $24.00 $175,008.00
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · nonDerivative · entry 4

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 289,695

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 PurchaseCommon Stock 242,708 $24.00 $5,824,992.00
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · nonDerivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,654,724

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 ConversionCommon Stock 282,403 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 282,403

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: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the preferred stock held directly by Four Pines.

Read SEC document
November 03, 2020 Filed Nov 4, 2020 21:05 UTC Atea Pharmaceuticals, Inc. AVIR · Entity 5580 ConversionCommon Stock 1,412,016 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-030382 · doc4.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,412,016

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: The preferred stock was convertible at any time, at the holder's election and had no expiration date. Each share of preferred stock was automatically converted into one share of common stock upon the closing of the Issuer's initial public offering of its common stock.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of preferred stock held directly by Master Fund.

Read SEC document
July 28, 2020 Filed Jul 28, 2020 20:53 UTC Inozyme Pharma, Inc. INZY · Entity 77717 ConversionSeries A-2 Convertible Preferred Stock · Derivative 3,496,504 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-020576 · doc4.xml · derivative · entry 4

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 467,884 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: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F1 · derivative.exercise_date: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F1 · derivative.expiration_date: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Read SEC document
July 28, 2020 Filed Jul 28, 2020 20:53 UTC Inozyme Pharma, Inc. INZY · Entity 77717 PurchaseCommon Stock 24,000 $16.00 $384,000.00
Disclosure

SEC source: 0000899243-20-020576 · doc4.xml · nonDerivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,067,884

F3 · ownership.nature: The securities reported herein are held of record by Four Pines Master Fund LP. RSC is the general partner of RSCM which is the investment manager to Four Pines Master Fund LP. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Four Pines Master Fund LP.

Read SEC document
July 28, 2020 Filed Jul 28, 2020 20:53 UTC Inozyme Pharma, Inc. INZY · Entity 77717 PurchaseCommon Stock 576,000 $16.00 $9,216,000.00
Disclosure

SEC source: 0000899243-20-020576 · doc4.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,043,884

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Read SEC document
July 28, 2020 Filed Jul 28, 2020 20:53 UTC Inozyme Pharma, Inc. INZY · Entity 77717 ConversionCommon Stock 467,884 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-020576 · doc4.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 467,884

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: On July 28, 2020, the Series A-2 Convertible Preferred Stock automatically converted into Common Stock on a 7.4730-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A-2 Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Common Stock held directly by Master Fund.

Read SEC document
March 16, 2020 Filed Mar 16, 2020 21:04 UTC Enliven Therapeutics, Inc. IMRA · Entity 4024 ConversionSeries B Preferred Stock · Derivative 1,722,222 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-008475 · doc4.xml · derivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 273,411 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: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F1 · derivative.exercise_date: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F1 · derivative.expiration_date: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Read SEC document
March 16, 2020 Filed Mar 16, 2020 21:04 UTC Enliven Therapeutics, Inc. IMRA · Entity 4024 PurchaseCommon Stock 250,000 $16.00 $4,000,000.00
Disclosure

SEC source: 0000899243-20-008475 · doc4.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 523,411

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Read SEC document
March 16, 2020 Filed Mar 16, 2020 21:04 UTC Enliven Therapeutics, Inc. IMRA · Entity 4024 ConversionCommon Stock 273,411 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-008475 · doc4.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 273,411

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: On March 16, 2020, the Issuer's Series B Preferred Stock converted into Common Stock on a 6.299-for-1 basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the Series B Preferred Stock held directly by Master Fund.

Read SEC document
April 02, 2018 Filed Apr 4, 2018 20:24 UTC Q32 Bio Inc. FIXX · Entity 5594 ConversionSeries B Preferred Stock · Derivative 395,845 $0.00 $0.00
Disclosure

SEC source: 0000899243-18-009442 · doc4.xml · derivative · entry 3

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 395,845 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.

F2 · derivative.exercise_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock.

F2 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock.

F2 · derivative.expiration_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock.

F1 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

Read SEC document
April 02, 2018 Filed Apr 4, 2018 20:24 UTC Q32 Bio Inc. FIXX · Entity 5594 PurchaseCommon Stock 250,000 $16.00 $4,000,000.00
Disclosure

SEC source: 0000899243-18-009442 · doc4.xml · nonDerivative · entry 2

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 645,845

F1 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

Read SEC document
April 02, 2018 Filed Apr 4, 2018 20:24 UTC Q32 Bio Inc. FIXX · Entity 5594 ConversionCommon Stock 395,845 $0.00 $0.00
Disclosure

SEC source: 0000899243-18-009442 · doc4.xml · nonDerivative · entry 1

Rock Springs Capital Management LP · CIK 0001595725 · 10% owner

Rock Springs Capital Master Fund LP · CIK 0001735393 · 10% owner

Rock Springs Capital LLC · CIK 0001735397 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 395,845

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 · ownership.nature: The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the securities held directly by Master Fund.

Read SEC document

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