Filing Details

The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

  Names of Reporting Persons

  Summit Partners L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  44,034,960

  Sole Dispositive Power

  0

  Shared Dispositive Power

  44,034,960

  Aggregate Amount Beneficially Owned by Each Reporting Person

  44,034,960⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  56.77%⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents (i) 29,867,378 shares of Class A common stock and (ii) 14,167,582 shares of Class A common stock issuable in respect of 14,167,582 shares of Class B common stock (Class B Shares) convertible (together with an equal number of common membership interests in Solo Stove Holdings, LLC (Units)) into Class A common stock on a one-to-one basis.

Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Partners Growth Equity Fund X-A, L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  11,304,941

  Sole Dispositive Power

  0

  Shared Dispositive Power

  11,304,941

  Aggregate Amount Beneficially Owned by Each Reporting Person

  11,304,941⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  14.57%⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents 11,304,941 shares of Class A common stock.

Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Partners Growth Equity Fund X-B, L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  17,271,224

  Sole Dispositive Power

  0

  Shared Dispositive Power

  17,271,224

  Aggregate Amount Beneficially Owned by Each Reporting Person

  17,271,224⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  22.27%⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents 17,271,224 shares of Class A common stock.

Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Partners Growth Equity Fund X-C, L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  466,295

  Sole Dispositive Power

  0

  Shared Dispositive Power

  466,295

  Aggregate Amount Beneficially Owned by Each Reporting Person

  466,295⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  *⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents 466,295 shares of Class A common stock.

Beneficial ownership representing less than 1% is denoted with an asterisk (*). Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Partners Subordinated Debt Fund V-A, L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  569,102

  Sole Dispositive Power

  0

  Shared Dispositive Power

  569,102

  Aggregate Amount Beneficially Owned by Each Reporting Person

  569,102⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  *⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents 569,102 shares of Class A common stock.

Beneficial ownership representing less than 1% is denoted with an asterisk (*). Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Partners Subordinated Debt Fund V-B, L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  201,182

  Sole Dispositive Power

  0

  Shared Dispositive Power

  201,182

  Aggregate Amount Beneficially Owned by Each Reporting Person

  201,182⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  *⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents 201,182 shares of Class A common stock.

Beneficial ownership representing less than 1% is denoted with an asterisk (*). Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Investors X, LLC

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  50,735

  Sole Dispositive Power

  0

  Shared Dispositive Power

  50,735

  Aggregate Amount Beneficially Owned by Each Reporting Person

  50,735⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  *⁽²⁾

  Type of Reporting Person (See Instructions)

  OO

Represents 50,735 shares of Class A common stock.

Beneficial ownership representing less than 1% is denoted with an asterisk (*). Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  Summit Investors X (UK), L.P.

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  3,899

  Sole Dispositive Power

  0

  Shared Dispositive Power

  3,899

  Aggregate Amount Beneficially Owned by Each Reporting Person

  3,899⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  *⁽²⁾

  Type of Reporting Person (See Instructions)

  PN

Represents 3,899 shares of Class A common stock.

Beneficial ownership representing less than 1% is denoted with an asterisk (*). Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

  Names of Reporting Persons

  SP-SS Aggregator LLC

  Check The Appropriate Box if a Member of a Group (See Instructions)

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  Delaware

Number of

Shares

 Beneficially 

Owned By

Each

Reporting

Person

With

  Sole Voting Power

  0

  Shared Voting Power

  14,167,582

  Sole Dispositive Power

  0

  Shared Dispositive Power

  14,167,582

  Aggregate Amount Beneficially Owned by Each Reporting Person

  14,167,582⁽¹⁾

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented By Amount in Row (9)

  18.27%⁽²⁾

  Type of Reporting Person (See Instructions)

  OO

Represents 14,167,582 shares of Class A common stock issuable and acquirable by the Reporting Person in respect of 14,167,582 Class B Shares and Units.

Calculated based on (i) 63,397,635 shares of Class A common stock outstanding as of November 30, 2021 as reported on the Issuers Form 10-Q, filed on December 9, 2021 and (ii) 14,167,582 shares Class A common stock issuable in respect of the Class B Shares and Units.

1001 Mustang Drive

Grapevine, TX 76051

This statement is filed by the entities and persons listed below, all of whom together are referred to herein as the Reporting Persons:

(i)  Summit Partners L.P.

(ii)  Summit Partners Growth Equity Fund X-A, L.P.

(iii)   Summit Partners Growth Equity Fund X-B, L.P.

(iv) Summit Partners Growth Equity Fund X-C, L.P.

(v)   Summit Partners Subordinated Debt Fund V-A, L.P.

(vi) Summit Partners Subordinated Debt Fund V-B, L.P.

(vii)  Summit Investors X, LLC

(viii)  Summit Investors X (UK), L.P.

(ix) SP-SS Aggregator LLC

222 Berkeley Street, 18th Floor

Boston, MA 02116

Ownership

(a)   Amount beneficially owned: See #9 in each Reporting Persons table.

(b)  Percent of Class: See #11 in each Reporting Persons table.

(c)   Number of shares as to which the Reporting Person has:

(i)  Sole power to vote or to direct the vote:

See responses to Item 5 on each cover page.

(ii)  Shared power to vote or to direct the vote:

See responses to Item 6 on each cover page.

(iii)   Sole power to dispose or to direct the disposition of:

See responses to Item 7 on each cover page.

(iv) Shared power to dispose or to direct the disposition of:

See responses to Item 8 on each cover page.

Summit Partners, L.P. is the managing member of Summit Partners GE X, LLC, which is the general partner of Summit Partners GE X, L.P., the general partner of each of Summit Partners Growth Equity Fund X-A, L.P., Summit Partners Growth Equity Fund X-B, L.P., and Summit Partners Growth Equity Fund X-C, L.P. Summit Partners, L.P. also is the managing member of Summit Partners SD V, LLC, which is the general partner of Summit Partners SD V, L.P., the general partner of each of Summit Partners Subordinated Debt Fund V-A, L.P. and Summit Partners Subordinated Debt Fund V-B, L.P. Summit Master Company, LLC is the sole managing member of Summit Investors Management, LLC, which is (A) the manager of Summit Investors X, LLC, and (B) the general partner of Summit Investors X (UK), L.P. Summit Master Company, LLC, as the managing member of Summit Investors Management, LLC, has delegated investment decisions, including voting and dispositive power, to Summit Partners, L.P. and its Investment Committee. This Statement shall not be construed as an admission that any of the foregoing is the beneficial owner of any of the reported securities.