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RA Capital Management, L.P.

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

Total Filings

441

Stocks Covered

166

Latest Filing

Feb 17, 2026

Filings

AN2 THERAPEUTICS, INC.

SC 13G/A · Aug 13, 2024

6.7%

2.0M shares

Adagio Medical Holdings, Inc.

SC 13G · Aug 12, 2024

10.0%

1.3M shares

89bio, Inc.

SC 13D/A · Aug 7, 2024

13.4%

14.3M shares

Artiva Biotherapeutics, Inc.

SC 13D · Jul 29, 2024

42.3%

9.9M shares

Cidara Therapeutics, Inc.

SC 13D · Jul 25, 2024

10.0%

703K shares

Recursion Pharmaceuticals, Inc.

SC 13G · Jul 8, 2024

5.9%

15.4M shares

Praxis Precision Medicines, Inc.

SC 13G · Jul 2, 2024

7.2%

1.2M shares

Eliem Therapeutics, Inc.

SC 13D/A · Jul 2, 2024

47.1%

31.5M shares

Perceptive Capital Solutions Corp

SC 13G · Jun 24, 2024

8.4%

750K shares

Aerovate Therapeutics, Inc.

SC 13D/A · Jun 20, 2024

32.0%

9.2M shares

Evolent Health, Inc.

SC 13G · Jun 18, 2024

7.1%

8.3M shares

Solid Biosciences Inc.

SC 13D/A · Jun 12, 2024

11.3%

4.4M shares

Bicycle Therapeutics plc

SC 13G · Jun 7, 2024

5.0%

2.3M shares

N/A

Eliem Therapeutics, Inc.

SC 13D/A · Jun 6, 2024

44.3%

13.2M shares

Tourmaline Bio, Inc.

SC 13G · Jun 4, 2024

8.0%

2.0M shares

Structure Therapeutics Inc.

SC 13G · May 30, 2024

5.2%

7.2M shares

N/A

Eliem Therapeutics, Inc.

SC 13D/A · May 17, 2024

45.3%

13.2M shares

iTeos Therapeutics, Inc.

SC 13D/A · May 15, 2024

10.0%

3.7M shares

Medicenna Therapeutics Corp.

SC 13G · May 10, 2024

10.0%

7.7M shares

Black Diamond Therapeutics, Inc.

SC 13D/A · May 10, 2024

5.0%

2.8M shares

Werewolf Therapeutics, Inc.

SC 13D/A · May 7, 2024

14.2%

6.2M shares

Avidity Biosciences, Inc.

SC 13G · May 6, 2024

5.1%

4.9M shares

Zura Bio Limited

SC 13G · May 2, 2024

5.1%

3.2M shares

Aerovate Therapeutics, Inc.

SC 13D/A · Apr 30, 2024

28.9%

8.3M shares

Protara Therapeutics, Inc.

SC 13G · Apr 26, 2024

10.0%

2.1M shares

Surrozen, Inc.

SC 13G · Apr 15, 2024

10.0%

324K shares

N/A

Eliem Therapeutics, Inc.

SC 13D/A · Apr 12, 2024

47.5%

13.2M shares

Boundless Bio, Inc.

SC 13G · Apr 12, 2024

9.8%

2.2M shares

CervoMed Inc.

SC 13G · Apr 11, 2024

10.0%

825K shares

Acrivon Therapeutics, Inc.

SC 13D/A · Apr 11, 2024

27.1%

8.4M shares

Dyne Therapeutics, Inc.

SC 13G · Apr 4, 2024

6.4%

5.2M shares

Sera Prognostics, Inc.

SC 13G · Apr 1, 2024

6.5%

2.0M shares

Nkarta, Inc.

SC 13D/A · Mar 29, 2024

18.9%

13.8M shares

ARS Pharmaceuticals, Inc.

SC 13D/A · Mar 29, 2024

11.3%

10.9M shares

Alto Neuroscience, Inc.

SC 13G · Mar 29, 2024

5.2%

1.4M shares

N/A

LENZ Therapeutics, Inc.

SC 13D · Mar 28, 2024

16.6%

4.3M shares

N/A

Regulus Therapeutics Inc.

SC 13G · Mar 25, 2024

9.5%

6.3M shares

N/A

Cybin Inc.

SC 13G · Mar 25, 2024

7.7%

58.1M shares

N/A

Eliem Therapeutics, Inc.

SC 13D/A · Mar 18, 2024

47.5%

13.2M shares

PEPGEN INC.

SC 13D/A · Mar 11, 2024

33.1%

10.7M shares

Janux Therapeutics, Inc.

SC 13D/A · Mar 6, 2024

20.0%

10.6M shares

89bio, Inc.

SC 13D/A · Mar 6, 2024

14.8%

14.3M shares

CONNECT BIOPHARMA HOLDINGS LIMITED

SC 13D/A · Feb 27, 2024

0.0%

0 shares

Larimar Therapeutics, Inc.

SC 13G · Feb 26, 2024

9.5%

6.0M shares

Cytek Biosciences, Inc.

SC 13G · Feb 23, 2024

5.2%

6.8M shares

Icosavax, Inc.

SC 13D/A · Feb 21, 2024

0.0%

0 shares

EyePoint Pharmaceuticals, Inc.

SC 13G/A · Feb 15, 2024

6.1%

3.1M shares

UNICYCIVE THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2024

10.0%

3.5M shares

ORCHARD THERAPEUTICS PLC

SC 13G/A · Feb 14, 2024

0.0%

0 shares

Werewolf Therapeutics, Inc.

SC 13D/A · Feb 14, 2024

15.2%

6.2M shares