Avista Acquisition, LLC

SEC source: 0001140361-21-017951 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 7,721,298

F2 · shares: Represents an aggregate of 9,664,970 shares of common stock distributed by ACP Onshore and 11,489,556 shares of common stock distributed by ACP Offshore, in each case, on a pro rata basis to their respective limited partners in accordance with their organizational documents for no additional consideration (the "Distribution").

F3 · shares: Represents an aggregate of 4,811,747 shares of common stock directly held by ACP Onshore and 2,909,551 shares of common stock directly held by ACP Offshore, in each case following the Distribution.

F2 · price: Represents an aggregate of 9,664,970 shares of common stock distributed by ACP Onshore and 11,489,556 shares of common stock distributed by ACP Offshore, in each case, on a pro rata basis to their respective limited partners in accordance with their organizational documents for no additional consideration (the "Distribution").

F3 · balance_after: Represents an aggregate of 4,811,747 shares of common stock directly held by ACP Onshore and 2,909,551 shares of common stock directly held by ACP Offshore, in each case following the Distribution.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F6 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-026482 · form4.xml · nonDerivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 29,924,515

F5 · shares: Represents an aggregate of 50 shares of Common Stock purchased by ACP Onshore and 50 shares of Common Stock purchased by ACP Offshore.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F6 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests

SEC source: 0001140361-20-026482 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 29,924,415

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the Securities and Exchange Commission, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F3 · shares: Represents an aggregate of 1,373 shares of Common Stock purchased by ACP Onshore and 1,366 shares of Common Stock purchased by ACP Offshore.

F4 · price: Purchase prices range from $4.98 to $5.00 per share, inclusive.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F6 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests

SEC source: 0001140361-20-026147 · form4.xml · nonDerivative · entry 4

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 29,921,676

F4 · shares: The number of securities reported represents an aggregate number of shares of Common Stock purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the Securities and Exchange Commission, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F9 · shares: Represents an aggregate of 18,111 shares of Common Stock purchased by ACP Onshore and 18,016 shares of Common Stock purchased by ACP Offshore.

F10 · price: Purchase prices range from $4.86 to $5.00 per share, inclusive.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F11 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F12 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-026147 · form4.xml · nonDerivative · entry 3

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 29,885,549

F4 · shares: The number of securities reported represents an aggregate number of shares of Common Stock purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the Securities and Exchange Commission, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F7 · shares: Represents an aggregate of 22,747 shares of Common Stock purchased by ACP Onshore and 22,631 shares of Common Stock purchased by ACP Offshore.

F8 · price: Purchase prices range from $4.58 to $4.75 per share, inclusive.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F11 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F12 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-026147 · form4.xml · nonDerivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 29,840,171

F4 · shares: The number of securities reported represents an aggregate number of shares of Common Stock purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the Securities and Exchange Commission, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F5 · shares: Represents an aggregate of 25,065 shares of Common Stock purchased by ACP Onshore and 24,935 shares of Common Stock purchased by ACP Offshore.

F6 · price: Purchase prices range from $4.38 to $4.50 per share, inclusive.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F11 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F12 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-026147 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 29,790,171

F2 · shares: Represents an aggregate of 2,142,071 shares of Class A common stock of the Issuer ("Common Stock") purchased by ACP Onshore and 2,130,586 shares of Common Stock purchased by ACP Offshore in the Issuer's underwritten public offering (the "Offering") that was completed on November 17, 2020.

F3 · price: Represents the public offering price of $3.25 per share of Common Stock, without giving effect to the fee paid by the Issuer to Avista Capital Holdings, L.P., an affiliate of the Avista Funds ("Avista Management"), pursuant to the Fee Letter Agreement, dated November 12, 2020, among the Issuer, Avista Management and the Avista Funds, made in connection with the Offering, as described in the Issuer's Current Report on Form 8-K filed on November 18, 2020 and filed as Exhibit 10.1 thereto.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F11 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F12 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-005973 · form4.xml · nonDerivative · entry 4

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 25,517,514

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F12 · shares: Represents an aggregate of 37,601 shares of Common Stock purchased by ACP Onshore and 37,399 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F13 · price: Purchase prices range from $3.67 to $4.29 per share, inclusive.

F14 · balance_after: Represents 12,267,300 shares of Common Stock owned directly by ACP Onshore, 12,201,523 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F15 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F16 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-005973 · form4.xml · nonDerivative · entry 3

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 25,442,514

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F9 · shares: Represents an aggregate of 67,681 shares of Common Stock purchased by ACP Onshore and 67,319 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F10 · price: Purchase prices range from $4.02 to $4.47 per share, inclusive.

F11 · balance_after: Represents 12,229,699 shares of Common Stock owned directly by ACP Onshore, 12,164,124 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F15 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F16 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-005973 · form4.xml · nonDerivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 25,307,514

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F6 · shares: Represents an aggregate of 70,921 shares of Common Stock purchased by ACP Onshore and 70,541 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F7 · price: Purchase prices range from $3.975 to $4.50 per share, inclusive.

F8 · balance_after: Represents 12,162,018 shares of Common Stock owned directly by ACP Onshore, 12,096,805 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F15 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F16 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-20-005973 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 25,166,052

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F3 · shares: Represents an aggregate of 95,700 shares of Common Stock purchased by ACP Onshore and 95,187 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F4 · price: Purchase prices range from $2.98 to $3.97 per share, inclusive.

F5 · balance_after: Represents 12,091,097 shares of Common Stock owned directly by ACP Onshore, 12,026,264 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F15 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F16 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-021634 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 24,975,165

F2 · shares: Represents an aggregate of 3,008,064 shares of Common Stock purchased by ACP Onshore and 2,991,936 shares of Common Stock purchased by ACP Offshore in the Issuer's underwritten public offering (the "Offering") that was completed on November 26, 2019.

F3 · price: Represents the public offering price of $5.00 per share of Common Stock, without giving effect to the fee paid by the Issuer to Avista Capital Holdings, L.P., an affiliate of the Avista Funds ("Avista Management"), pursuant to the Fee Letter Agreement, dated November 19, 2019, among the Issuer, Avista Management and the Avista Funds, made in connection with the Offering, as described in the Issuer's Current Report on Form 8-K filed on November 22, 2019 and filed as Exhibit 10.1 thereto.

F2 · balance_after: Represents an aggregate of 3,008,064 shares of Common Stock purchased by ACP Onshore and 2,991,936 shares of Common Stock purchased by ACP Offshore in the Issuer's underwritten public offering (the "Offering") that was completed on November 26, 2019.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore" and together with ACP Onshore, the "Avista Funds"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F4 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F5 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016669 · form4.xml · nonDerivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 18,975,165

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F6 · shares: Represents an aggregate of 207,507 shares of Common Stock purchased by ACP Onshore and 206,393 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F7 · price: Purchase prices range from $5.62 to $6.25 per share, inclusive.

F8 · balance_after: Represents 8,987,333 shares of Common Stock owned directly by ACP Onshore, 8,939,141 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F9 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F10 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016669 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 18,561,265

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F3 · shares: Represents an aggregate of 224,101 shares of Common Stock purchased by ACP Onshore and 222,899 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F4 · price: Purchase prices range from $5.365 to $5.905 per share, inclusive.

F5 · balance_after: Represents 8,779,826 shares of Common Stock owned directly by ACP Onshore, 8,732,748 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F9 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F10 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016483 · form4.xml · nonDerivative · entry 3

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 18,114,265

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F9 · shares: Represents an aggregate of 6,016 shares of Common Stock purchased by ACP Onshore and 5,984 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F10 · price: Purchase prices range from $4.99 to $5.25 per share, inclusive.

F11 · balance_after: Represents 8,555,725 shares of Common Stock owned directly by ACP Onshore, 8,509,849 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F12 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F13 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016483 · form4.xml · nonDerivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 18,102,265

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F6 · shares: Represents an aggregate of 12,534 shares of Common Stock purchased by ACP Onshore and 12,466 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F7 · price: Purchase prices range from $4.91 to $5.68 per share, inclusive.

F8 · balance_after: Represents 8,549,709 shares of Common Stock owned directly by ACP Onshore, 8,503,865 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F12 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F13 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016483 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 18,077,265

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F3 · shares: Represents an aggregate of 250,673 shares of Common Stock purchased by ACP Onshore and 249,327 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F4 · price: Purchase prices range from $4.73 to $5.35 per share, inclusive.

F5 · balance_after: Represents 8,537,175 shares of Common Stock owned directly by ACP Onshore, 8,491,399 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F12 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F13 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016217 · form4.xml · nonDerivative · entry 3

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 17,577,265

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F9 · shares: Represents an aggregate of 89,039 shares of Common Stock purchased by ACP Onshore and 88,561 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F10 · price: Purchase prices range from $4.52 to $4.90 per share, inclusive.

F11 · balance_after: Represents 8,286,502 shares of Common Stock owned directly by ACP Onshore, 8,242,072 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F12 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F13 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016217 · form4.xml · nonDerivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 17,399,665

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F6 · shares: Represents an aggregate of 100,269 shares of Common Stock purchased by ACP Onshore and 99,731 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F7 · price: Purchase prices range from $4.70 to $4.90 per share, inclusive.

F8 · balance_after: Represents 8,197,463 shares of Common Stock owned directly by ACP Onshore, 8,153,511 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F12 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F13 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-016217 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 17,199,665

F2 · shares: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F3 · shares: Represents an aggregate of 100,269 shares of Common Stock purchased by ACP Onshore and 99,731 shares of Common Stock purchased by ACP Offshore.

F2 · price: The number of securities reported represents an aggregate number of shares of Class A common stock of the Issuer ("Common Stock") purchased in multiple market transactions over a range of purchase prices. The price reported represents the weighted average price per share. Each Reporting Person undertakes to provide the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares of Common Stock purchased by the Reporting Person at each separate price within the range.

F4 · price: Purchase prices range from $4.44 to $4.75 per share, inclusive.

F5 · balance_after: Represents 8,097,194 shares of Common Stock owned directly by ACP Onshore, 8,053,780 shares of Common Stock owned directly by ACP Offshore, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thompson Dean; and David Burgstahler.

F12 · ownership.nature: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F13 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-015434 · form4.xml · derivative · entry 2

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 0

Underlying: Class A common stock · 2,050,000 shares

Expires 2023-12-10

F5 · derivative.exercise_price: Each warrant entitled the holder to purchase from the Issuer shares of Common Stock at a price of $5.75 per-half share of Common Stock (or $11.50 per whole share), subject to adjustments.

F2 · kind: Based on a ratio of 0.095 shares per warrant, ACP Onshore and ACP Offshore exchanged (with the Issuer) 2,055,510 warrants and 2,044,490 warrants, respectively, for 195,274 shares and 194,227 shares, respectively (the "Warrant Exchange").

F2 · price: Based on a ratio of 0.095 shares per warrant, ACP Onshore and ACP Offshore exchanged (with the Issuer) 2,055,510 warrants and 2,044,490 warrants, respectively, for 195,274 shares and 194,227 shares, respectively (the "Warrant Exchange").

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thomspon Dean; and David Burgstahler.

F6 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-19-015434 · form4.xml · nonDerivative · entry 1

Avista Capital Managing Member IV, LLC · CIK 0001761175 · Director · 10% owner

Avista Acquisition Corp. · CIK 0001661187 · Director · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · Director · 10% owner

Avista Capital Partners IV, L.P. · CIK 0001664176 · Director · 10% owner

Avista Capital Partners (Offshore) IV, L.P. · CIK 0001664173 · Director · 10% owner

Avista Capital Partners IV GP, L.P. · CIK 0001761195 · Director · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Notes

Disclosed balance after: 16,999,665

F2 · kind: Based on a ratio of 0.095 shares per warrant, ACP Onshore and ACP Offshore exchanged (with the Issuer) 2,055,510 warrants and 2,044,490 warrants, respectively, for 195,274 shares and 194,227 shares, respectively (the "Warrant Exchange").

F2 · price: Based on a ratio of 0.095 shares per warrant, ACP Onshore and ACP Offshore exchanged (with the Issuer) 2,055,510 warrants and 2,044,490 warrants, respectively, for 195,274 shares and 194,227 shares, respectively (the "Warrant Exchange").

F3 · balance_after: Represents 7,996,925 shares of Common Stock owned directly by ACP Onshore and 7,954,049 shares of Common Stock owned directly by ACP Offshore, in each case, following the Warrant Exchange, and 1,048,691 shares of Common Stock owned directly by the Sponsor.

F4 · balance_after: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests.Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Joshua Tamaroff, an employee of an affiliate of the Reporting Persons, serves on the board of directors of the Issuer as a representative of the Reporting Persons.

F1 · ownership.nature: This statement is being filed by the following Reporting Persons: Avista Acquisition Corp. (the "Sponsor"); Avista Acquisition LLC, which is the sole shareholder of the Sponsor; Avista Capital Partners IV, L.P. ("ACP Onshore"); Avista Capital Partners (Offshore) IV, L.P. ("ACP Offshore"); Avista Capital Partners IV GP, L.P. ("Avista GP"), which is the general partner of ACP Onshore and ACP Offshore; Avista Capital Managing Member IV, LLC, which is the general partner of Avista GP; Thomspon Dean; and David Burgstahler.

F6 · ownership.nature: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-18-045058 · form4.xml · derivative · entry 1

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,048,691

Underlying: Class A Ordinary Shares · 3,247,668 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of Avista Healthcare Public Acquisition Corp. (the "Issuer"), the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F2 · kind: The 3,247,668 Class B ordinary shares were forfeited by Avista Acquisition Corp. (the "Sponsor") to the Issuer for no consideration prior to the closing of the Business Combination.

F2 · price: The 3,247,668 Class B ordinary shares were forfeited by Avista Acquisition Corp. (the "Sponsor") to the Issuer for no consideration prior to the closing of the Business Combination.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of Avista Healthcare Public Acquisition Corp. (the "Issuer"), the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of Avista Healthcare Public Acquisition Corp. (the "Issuer"), the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F3 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition" and, together with Sponsor, the "Reporting Persons").

F4 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F5 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001104659-18-065497 · a4.xml · derivative · entry 1

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

Burgstahler David F · CIK 0001374179 · Director · President & CEO · 10% owner

Dean Thompson · CIK 0001069096 · Director · Executive Chairman · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,296,359

Underlying: Class A Ordinary Shares · 26,984 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F2 · kind: Represents 7,158 Class B ordinary shares received by Avista Acquisition Corp. (the "Sponsor") from each of Hakan Bjorklund, Charles Harwood and Robert O'Neil and 5,510 Class B ordinary shares received from Brian Markison, in each case, for no consideration.

F2 · price: Represents 7,158 Class B ordinary shares received by Avista Acquisition Corp. (the "Sponsor") from each of Hakan Bjorklund, Charles Harwood and Robert O'Neil and 5,510 Class B ordinary shares received from Brian Markison, in each case, for no consideration.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F3 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Avista Acquisition, Messrs. Dean and Burgstahler are the "Reporting Persons").

F4 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F5 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001104659-18-062196 · a4.xml · derivative · entry 1

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

Dean Thompson · CIK 0001069096 · Director · 10% owner

Burgstahler David F · CIK 0001374179 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,269,375

Underlying: Class A Ordinary Shares · 1,423,125 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F2 · kind: 1,423,125 Class B ordinary shares were forfeited by Avista Acquisition Corp. (the "Sponsor") to the Issuer for no consideration.

F2 · price: 1,423,125 Class B ordinary shares were forfeited by Avista Acquisition Corp. (the "Sponsor") to the Issuer for no consideration.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F3 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Messrs. Dean and Burgstahler are the "Reporting Persons").

F4 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F5 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-17-036823 · form4.xml · derivative · entry 1

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

Dean Thompson · CIK 0001069096 · Director · Executive Chairman · 10% owner

Burgstahler David F · CIK 0001374179 · Director · President and CEO · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,692,500

Underlying: Class A Ordinary Shares · 186,320 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F5 · date: The original Form 4 filed on July 7, 2017 is amended by this Form 4 amendment solely to correctly reflect the ownership of Class B shares by the Reporting Persons and the transaction date. No other changes have been made to the original Form 4.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F5 · balance_after: The original Form 4 filed on July 7, 2017 is amended by this Form 4 amendment solely to correctly reflect the ownership of Class B shares by the Reporting Persons and the transaction date. No other changes have been made to the original Form 4.

F2 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Messrs. Dean and Burgstahler are the "Reporting Persons").

F3 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F4 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-16-088066 · form4.xml · derivative · entry 2

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

Dean Thompson · CIK 0001069096 · Director · Executive Chairman · 10% owner

Burgstahler David F · CIK 0001374179 · Director · President and CEO · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,878,820

Underlying: Class A Ordinary Shares · 161,180 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F3 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Messrs. Dean and Burgstahler are the "Reporting Persons").

F4 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F5 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-17-027467 · form4.xml · derivative · entry 1

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

Dean Thompson · CIK 0001069096 · Director · Executive Chairman · 10% owner

Burgstahler David F · CIK 0001374179 · Director · President and CEO · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,792,500

Underlying: Class A Ordinary Shares · 186,320 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F2 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Messrs. Dean and Burgstahler are the "Reporting Persons").

F3 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F4 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

SEC source: 0001140361-16-088066 · form4.xml · derivative · entry 1

Avista Acquisition Corp. · CIK 0001661187 · 10% owner

Avista Acquisition, LLC · CIK 0001686388 · 10% owner

Dean Thompson · CIK 0001069096 · Director · Executive Chairman · 10% owner

Burgstahler David F · CIK 0001374179 · Director · President and CEO · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,040,000

Underlying: Class A Ordinary Shares · 700,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F2 · kind: 700,000 shares of the Class B Shares were forfeited by Avista Acquisition Corp. (the "Sponsor") to the Issuer at no cost in connection with the underwriters' election not to exercise the remaining unused portion of the over-allotment option, as described in the Issuer's registration statement on Form S-1 (File No. 333-213465). Any indirect forfeitures by Thompson Dean and David Burgstahler (see footnote 3) are exempt transactions pursuant to Rule 16b-3(e) under the Exchange Act.

F2 · price: 700,000 shares of the Class B Shares were forfeited by Avista Acquisition Corp. (the "Sponsor") to the Issuer at no cost in connection with the underwriters' election not to exercise the remaining unused portion of the over-allotment option, as described in the Issuer's registration statement on Form S-1 (File No. 333-213465). Any indirect forfeitures by Thompson Dean and David Burgstahler (see footnote 3) are exempt transactions pursuant to Rule 16b-3(e) under the Exchange Act.

F1 · derivative.exercise_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F1 · derivative.expiration_date: Pursuant to the Amended and Restated Memorandum and Articles of Association (the "Articles") of the Issuer, the Class B ordinary shares, par value $0.0001 per share (the "Class B Shares") will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's Business Combination, as defined in the Articles, on a one-for-one basis, subject to adjustment, and have no expiration date.

F3 · ownership.direct: Directly owned by Sponsor. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisition"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Messrs. Dean and Burgstahler are the "Reporting Persons").

F4 · ownership.direct: Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

F5 · ownership.direct: Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.