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BSOF Parallel Master Fund L.P.

Disclosed activity across 1 company

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15567
SEC CIK
0001736665

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Praxis Precision Medicines, Inc.PRAX · Entity 353810% ownerOctober 06, 2021October 08, 2021

Disclosed balances

About these balances

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

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectSee Footnotes0 Reported balance After 2021-10-06 transaction · row 1 Holding and transaction disclosures are not merged.
1 source row

Row 1 · 2021-10-06 · Sale · Disposed 400,000 · Balance 0

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $17.50 to $18.48, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F2: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F4: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Common StockSEC Table I · non-derivativeIndirectSee Footnotes4,894,109 Reported balance Holding disclosure · report date 2021-10-06 · row 2 Holding and transaction disclosures are not merged.
1 source row

Row 2 · Balance 4,894,109

F3: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Filing footnotes · ownership attribution and instrument terms

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $17.50 to $18.48, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F2: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F3: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

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Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 06, 2021 Filed Oct 8, 2021 20:33 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 400,000 $17.50 $7,000,000.00
Disclosure

SEC source: 0000899243-21-039704 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $17.50 to $18.48, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F2 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 05, 2021 Filed Oct 5, 2021 21:43 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 23,946 $19.15 $458,565.90
Disclosure

SEC source: 0000899243-21-039264 · doc4.xml · nonDerivative · entry 2

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 400,000

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $19.00 to $19.305, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 01, 2021 Filed Oct 5, 2021 21:43 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 22,600 $19.13 $432,338.00
Disclosure

SEC source: 0000899243-21-039264 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 423,946

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $18.835 to $19.31, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 23, 2021 Filed Aug 25, 2021 20:30 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 771 $20.04 $15,450.84
Disclosure

SEC source: 0000899243-21-034149 · doc4.xml · nonDerivative · entry 2

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 446,546

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $20.00 to $20.06, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 23, 2021 Filed Aug 25, 2021 20:30 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 351,625 $19.00 $6,680,875.00
Disclosure

SEC source: 0000899243-21-034149 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 447,317

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $19.00 to $19.99, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 18, 2021 Filed Aug 20, 2021 21:01 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 3,000 $15.88 $47,640.00
Disclosure

SEC source: 0000899243-21-033841 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 798,942

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.86 to $15.895, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F2 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 12, 2021 Filed Aug 13, 2021 20:31 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 10,060 $13.92 $140,035.20
Disclosure

SEC source: 0000899243-21-032969 · doc4.xml · nonDerivative · entry 2

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 801,942

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $13.85 to $14.0325, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 11, 2021 Filed Aug 13, 2021 20:31 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 17,222 $15.03 $258,846.66
Disclosure

SEC source: 0000899243-21-032969 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 812,002

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.00 to $15.18, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is Blackstone Inc. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 03, 2021 Filed Aug 5, 2021 23:35 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 22,300 $14.99 $334,277.00
Disclosure

SEC source: 0000899243-21-031824 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Group Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 829,224

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.82 to $15.205, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F2 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Series II preferred stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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August 02, 2021 Filed Aug 3, 2021 21:09 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 40,000 $15.78 $631,200.00
Disclosure

SEC source: 0000899243-21-031302 · doc4.xml · nonDerivative · entry 2

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Group Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 851,524

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.55 to $15.82, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Series II preferred stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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July 30, 2021 Filed Aug 3, 2021 21:09 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 SaleCommon Stock 15,854 $15.68 $248,590.72
Disclosure

SEC source: 0000899243-21-031302 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

Blackstone Holdings I L.P. · CIK 0001464694 · 10% owner

Blackstone Holdings II L.P. · CIK 0001484870 · 10% owner

Blackstone Holdings I/II GP L.L.C. · CIK 0001464695 · 10% owner

Blackstone Group Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 891,524

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.60 to $15.98, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price in the range set forth in this footnote.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F5 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Series II preferred stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F6 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionSeries C-1 Redeemable Convertible Preferred Stock · Derivative 352,734 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · derivative · entry 12

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 164,832 shares

Expires not disclosed

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

F1 · derivative.exercise_price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.exercise_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.expiration_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionSeries C Redeemable Convertible Preferred Stock · Derivative 1,941,748 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · derivative · entry 11

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 907,378 shares

Expires not disclosed

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

F1 · derivative.exercise_price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.exercise_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.expiration_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionSeries C Redeemable Convertible Preferred Stock · Derivative 559,208 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · derivative · entry 10

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 261,318 shares

Expires not disclosed

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

F1 · derivative.exercise_price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.exercise_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.expiration_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionSeries B-1 Redeemable Convertible Preferred Stock · Derivative 1,410,477 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · derivative · entry 9

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 659,116 shares

Expires not disclosed

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

F1 · derivative.exercise_price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.exercise_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.expiration_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionSeries B Redeemable Convertible Preferred Stock · Derivative 5,052,852 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · derivative · entry 8

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 2,361,198 shares

Expires not disclosed

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

F1 · derivative.exercise_price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.exercise_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.expiration_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionSeries A Redeemable Convertible Preferred Stock · Derivative 7,375,799 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · derivative · entry 7

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 3,446,711 shares

Expires not disclosed

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

F1 · derivative.exercise_price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.exercise_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F1 · derivative.expiration_date: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionCommon Stock 164,832 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · nonDerivative · entry 6

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,594,109

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

F1 · price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionCommon Stock 907,378 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · nonDerivative · entry 5

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 907,378

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

F1 · price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F3 · ownership.nature: Reflects securities held directly by BSOF Parallel Master Fund L.P. Blackstone Strategic Opportunity Associates L.L.C. is the general partner of BSOF Parallel Master Fund L.P. Blackstone Holdings II L.P. is the sole member of Blackstone Strategic Opportunity Associates L.L.C. Blackstone Alternative Solutions L.L.C. is the investment manager of BSOF Parallel Master Fund L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Alternative Solutions L.L.C.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionCommon Stock 261,318 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · nonDerivative · entry 4

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,429,277

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

F1 · price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionCommon Stock 659,116 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · nonDerivative · entry 3

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,167,959

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

F1 · price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionCommon Stock 2,361,198 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · nonDerivative · entry 2

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 6,508,843

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

F1 · price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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October 20, 2020 Filed Oct 22, 2020 22:45 UTC Praxis Precision Medicines, Inc. PRAX · Entity 3538 ConversionCommon Stock 3,446,711 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-029064 · doc4.xml · nonDerivative · entry 1

BSOF Parallel Master Fund L.P. · CIK 0001736665 · 10% owner

Blackstone Strategic Opportunity Associates L.L.C. · CIK 0001728529 · 10% owner

Blackstone Alternative Solutions L.L.C. · CIK 0001728531 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 4,147,645

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

F1 · price: All series of Preferred Stock of the Issuer automatically converted into common stock of the Issuer on a 1-for-2.14 basis. Each series of Preferred Stock had no expiration date.

F2 · ownership.nature: Reflects securities held directly by Clarus Lifesciences III, L.P. Clarus Ventures III GP, L.P. is the general partner of Clarus Lifesciences III, L.P. Blackstone Clarus III L.L.C. is the general partner of Clarus Ventures III GP, L.P. The sole member of Blackstone Clarus III L.L.C. is Blackstone Holdings II L.P.

F4 · ownership.nature: The general partner of each of Blackstone Holdings I L.P. and Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

F5 · ownership.nature: Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

F6 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F7 · ownership.nature: Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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