Boxer Capital, LLC

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

45

Stocks Covered

26

Latest Filing

Oct 26, 2024

Filings

QURE

uniQure, N.V.

SC 13G/A · Oct 26, 2024

0.0%

0 shares

SWTX

SpringWorks Therapeutics Inc.

SC 13G/A · Oct 26, 2024

0.0%

0 shares

NKTX

Nkarta, Inc.

SC 13G/A · Oct 26, 2024

0.0%

0 shares

TIL

Instil Bio, Inc.

SC 13G/A · Oct 26, 2024

0.0%

0 shares

IPSC

Century Therapeutics Inc.

SC 13G/A · Oct 26, 2024

0.0%

0 shares

FATE

Fate Therapeutics, Inc.

SC 13G/A · Oct 26, 2024

0.0%

0 shares

TYRA

Tyra Biosciences, Inc.

SC 13D/A · Oct 16, 2024

0.0%

0 shares

ITOS

iTeos Therapeutics, Inc.

SC 13D/A · Oct 16, 2024

0.0%

0 shares

TIL

Instil Bio, Inc.

SC 13G · Sep 27, 2024

5.5%

356K shares

ITOS

iTeos Therapeutics, Inc.

SC 13D/A · May 15, 2024

8.1%

2.9M shares

IPSC

Century Therapeutics, Inc.

SC 13G · Apr 22, 2024

5.8%

4.9M shares

PMVP

PMV Pharmaceuticals, Inc.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

FATE

Fate Therapeutics, Inc.

SC 13G · Feb 12, 2024

6.3%

6.2M shares

MRTX

Mirati Therapeutics, Inc.

SC 13D/A · Jan 25, 2024

0.0%

0 shares

NKTX

Nkarta, Inc.

SC 13G · Jan 18, 2024

9.0%

4.4M shares

RAIN

Rain Oncology Inc.

SC 13D/A · Dec 18, 2023

9.9%

2.9M shares

MRTX

Mirati Therapeutics, Inc.

SC 13D/A · Oct 12, 2023

4.8%

3.5M shares

MRTX

Mirati Therapeutics, Inc.

SC 13D/A · Aug 16, 2023

4.8%

3.5M shares

RAIN

Rain Oncology Inc.

SC 13D/A · May 24, 2023

9.9%

2.8M shares

MIST

Milestone Pharmaceuticals Inc.

SC 13G/A · Feb 14, 2023

2.0%

699K shares

IDYA

IDEAYA, Inc.

SC 13G/A · Feb 14, 2023

4.6%

2.2M shares

PMVP

PMV Pharmaceuticals, Inc.

SC 13G/A · Feb 14, 2023

6.9%

3.2M shares

RAIN

Rain Therapeutics Inc.

SC 13D/A · Nov 8, 2022

10.0%

2.5M shares

SWTX

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). Page 2 of 8 CUSIP No. 85205L107 1 Name of reporting persons. Boxer Capital, LLC 2 Check the appropriate box if a member of a group. (a) ☐ (b) ☒ 3 SEC use only. 4 Citizenship or place of organization. Delaware NUMBER OF SHARES 5 Sole voting power. -0- 6 Shared voting power. 3,421,541 7 Sole dispositive power. -0- 8 Shared dispositive power. 3,421,541 9 Aggregate amount . 3,421,541 10 Check box if the aggregate amount in row (9) excludes certain shares . ☐ 11 Percent of class represented by amount in row (9). 5.7%* 12 Type of reporting person OO * Based on 60,144,001 shares of Common Stock outstanding, which is the sum of (i) 49,442,662 shares of Common Stock outstanding as of July 29, 2022 as set forth in the Issuer’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission (“SEC”) on August 4, 2022, (ii) 2,050,819 shares of Common Stock issued in a private placement, as described in the Issuer’s Current Report on Form 8-K, filed with the SEC on September 7, 2022, and (iii) 8,650,520 shares of Common Stock issued in a private placement, as described in the Issuer’s Current Report on Form 8-K, filed with the SEC on September 8, 2022. Page 3 of 8 CUSIP No. 85205L107 1 Name of reporting persons. Boxer Asset Management Inc. 2 Check the appropriate box if a member of a group. (a) ☐ (b) ☒ 3 SEC use only. 4 Citizenship or place of organization. Bahamas NUMBER OF SHARES 5 Sole voting power. -0- 6 Shared voting power. 3,421,541 7 Sole dispositive power. -0- 8 Shared dispositive power. 3,421,541 9 Aggregate amount . 3,421,541 10 Check box if the aggregate amount in row (9) excludes certain shares . ☐ 11 Percent of class represented by amount in row (9). 5.7%* 12 Type of reporting person CO * Based on 60,144,001 shares of Common Stock outstanding, which is the sum of (i) 49,442,662 shares of Common Stock outstanding as of July 29, 2022 as set forth in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC on August 4, 2022, (ii) 2,050,819 shares of Common Stock issued in a private placement, as described in the Issuer’s Current Report on Form 8-K, filed with the SEC on September 7, 2022, and (iii) 8,650,520 shares of Common Stock issued in a private placement, as described in the Issuer’s Current Report on Form 8-K, filed with the SEC on September 8, 2022. Page 4 of 8 CUSIP No. 85205L107 1 Name of reporting persons. Joe Lewis 2 Check the appropriate box if a member of a group. (a) ☐ (b) ☒ 3 SEC use only. 4 Citizenship or place of organization. United Kingdom NUMBER OF SHARES : 5 Sole voting power. -0- 6 Shared voting power. 3,421,541 7 Sole dispositive power. -0- 8 Shared dispositive power. 3,421,541 9 Aggregate amount . 3,421,541 10 Check box if the aggregate amount in row (9) excludes certain shares . ☐ 11 Percent of class represented by amount in row (9). 5.7%* 12 Type of reporting person IN * Based on 60,144,001 shares of Common Stock outstanding, which is the sum of (i) 49,442,662 shares of Common Stock outstanding as of July 29, 2022 as set forth in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC on August 4, 2022, (ii) 2,050,819 shares of Common Stock issued in a private placement, as described in the Issuer’s Current Report on Form 8-K, filed with the SEC on September 7, 2022, and (iii) 8,650,520 shares of Common Stock issued in a private placement, as described in the Issuer’s Current Report on Form 8-K, filed with the SEC on September 8, 2022. Page 5 of 8 Item 1(a).

SC 13G · Sep 19, 2022

0.342 shares

TYRA

Tyra Biosciences, Inc.

SC 13D/A · Jun 15, 2022

15.1%

6.3M shares

ITOS

iTeos Therapeutics, Inc.

SC 13D/A · May 11, 2022

6.1%

2.2M shares

ITOS

iTeos Therapeutics, Inc.

SC 13D/A · Mar 19, 2022

8.9%

3.1M shares

MIST

Milestone Pharmaceuticals Inc.

SC 13G/A · Feb 14, 2022

0.224 shares

BCEL

Atreca, Inc.

SC 13G/A · Feb 14, 2022

7.2%

2.2M shares

MTNB

MATINAS BIOPHARMA HOLDINGS, INC.

SC 13G/A · Feb 14, 2022

0 shares

SLDB

SOLID BIOSCIENCES INC.

SC 13G/A · Feb 14, 2022

0.534 shares

CABA

Cabaletta Bio, Inc.

SC 13G/A · Feb 14, 2022

0.54 shares

MREO

Mereo Biopharma Group plc

SC 13G/A · Feb 14, 2022

0.408 shares

N/A

DBV Technologies S.A.

SC 13G/A · Feb 14, 2022

0.107 shares

SPRY

SILVERBACK THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2022

0 shares

MRNS

MARINUS PHARMACEUTICALS, INC.

SC 13G/A · Feb 14, 2022

0 shares

CBAY

CYMABAY THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2022

0 shares

ELEV

Elevation Oncology, Inc.

SC 13G/A · Feb 14, 2022

0.873 shares

FSTX

F-Star Therapeutics, Inc.

SC 13G/A · Feb 14, 2022

0 shares

N/A

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP No. 88339T103 Page 2 of 7 1 Name of reporting persons. Boxer Capital, LLC 2 Check the appropriate box if a member of a group. (a) ☐ (b) ☒ 3 SEC use only. 4 Citizenship or place of organization. Delaware NUMBER OF SHARES 5 Sole voting power. -0- 6 Shared voting power. 2,500,000 7 Sole dispositive power. -0- 8 Shared dispositive power. 2,500,000 9 Aggregate amount . 2,500,000 10 Check box if the aggregate amount in row (9) excludes certain shares . ☐ 11 Percent of class represented by amount in row (9). 2.8%* 12 Type of reporting person OO * Based on 90,121,794 shares of common stock outstanding as of November 8, 2021, as set forth in the Issuer’s Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission (“SEC”) on November 12, 2021. CUSIP No. 88339T103 Page 3 of 7 1 Name of reporting persons. Boxer Asset Management Inc. 2 Check the appropriate box if a member of a group. (a) ☐ (b) ☒ 3 SEC use only. 4 Citizenship or place of organization. Bahamas NUMBER OF SHARES 5 Sole voting power. -0- 6 Shared voting power. 2,500,000 7 Sole dispositive power. -0- 8 Shared dispositive power. 2,500,000 9 Aggregate amount . 2,500,000 10 Check box if the aggregate amount in row (9) excludes certain shares . ☐ 11 Percent of class represented by amount in row (9). 2.8%* 12 Type of reporting person CO * Based on 90,121,794 shares of common stock outstanding as of November 8, 2021, as set forth in the Issuer’s Quarterly Report on Form 10-Q filed with the SEC on November 12, 2021. CUSIP No. 88339T103 Page 4 of 7 1 Name of reporting persons. Joe Lewis 2 Check the appropriate box if a member of a group. (a) ☐ (b) ☒ 3 SEC use only. 4 Citizenship or place of organization. United Kingdom NUMBER OF SHARES : 5 Sole voting power. -0- 6 Shared voting power. 2,500,000 7 Sole dispositive power. -0- 8 Shared dispositive power. 2,500,000 9 Aggregate amount . 2,500,000 10 Check box if the aggregate amount in row (9) excludes certain shares . ☐ 11 Percent of class represented by amount in row (9). 2.8%* 12 Type of reporting person IN * Based on 90,121,794 shares of common stock outstanding as of November 8, 2021, as set forth in the Issuer’s Quarterly Report on Form 10-Q filed with the SEC on November 12, 2021. Page 5 of 7 This Amendment No. 1 (“Amendment No. 1”) amends and supplements the Schedule 13G filed on July 20, 2020 (the “Original Filing”) by Boxer Capital, LLC (“Boxer Capital”), Boxer Asset Management Inc. (“Boxer Management”) and Joe Lewis (together with Boxer Capital and Boxer Management, the “Reporting Persons”). The Original Filing remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment No. 1. Capitalized terms used and not defined in this Amendment No. 1 have the meanings set forth in the Original Filing, as amended. Item 1(a).

SC 13G/A · Feb 14, 2022

0.25 shares

PMVP

PMV Pharmaceuticals, Inc.

SC 13G/A · Feb 14, 2022

0.284 shares

TLIS

TALIS BIOMEDICAL CORPORATION

SC 13G/A · Feb 14, 2022

0 shares

BMEA

Biomea Fusion, Inc.

SC 13G/A · Feb 14, 2022

0.119 shares

MRUS

Merus N.V.

SC 13G/A · Feb 14, 2022

0.19 shares

ITOS

iTeos Therapeutics, Inc.

SC 13D/A · Jan 6, 2022

10.5%

3.7M shares