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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

TOURMALINE BIO, INC.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

NEKTAR THERAPEUTICS

SC 13G/A · Feb 14, 2024

0.0%

0 shares

ImmunoGen, Inc.

SC 13G/A · Feb 14, 2024

10.0%

26.9M shares

CHIMERIX, INC.

SC 13G/A · Feb 14, 2024

9.9%

8.8M shares

AN2 THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2024

18.7%

5.6M shares

4D MOLECULAR THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2024

9.7%

4.2M shares

CUREVAC N.V.

SC 13G/A · Feb 14, 2024

1.2%

2.7M shares

ALPINE IMMUNE SCIENCES, INC.

SC 13G/A · Feb 14, 2024

10.0%

5.9M shares

GERON CORPORATION

SC 13G/A · Feb 14, 2024

10.0%

55.1M shares

FULCRUM THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2024

18.8%

11.6M shares

GH Research PLC

SC 13G/A · Feb 14, 2024

10.7%

5.6M shares

AVIDITY BIOSCIENCES, INC.

SC 13G/A · Feb 14, 2024

3.3%

2.5M shares

Ascendis Pharma A/S

SC 13G/A · Feb 14, 2024

17.5%

10.1M shares

Day One Biopharmaceuticals, Inc.

SC 13G/A · Feb 14, 2024

9.0%

7.8M shares

GRACELL BIOTECHNOLOGIES INC.

SC 13G/A · Feb 14, 2024

10.0%

48.6M shares

Tenaya Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

10.0%

6.9M shares

VAXCYTE, INC.

SC 13G/A · Feb 14, 2024

10.0%

9.7M shares

CELCUITY INC.

SC 13G/A · Feb 14, 2024

5.0%

1.3M shares

INHIBRX, INC.

SC 13G/A · Feb 14, 2024

10.0%

4.7M shares

Apogee Therapeutics, Inc.

SC 13G · Feb 14, 2024

5.3%

2.0M shares

TAYSHA GENE THERAPIES, INC.

SC 13G/A · Feb 14, 2024

10.0%

18.7M shares

RxSIGHT, Inc.

SC 13G/A · Feb 14, 2024

9.5%

3.4M shares

MACROGENICS, INC.

SC 13G/A · Feb 14, 2024

6.5%

4.1M shares

HARPOON THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2024

10.0%

1.7M shares

Verona Pharma plc

SC 13G/A · Feb 14, 2024

10.0%

7.5M shares

RHYTHM PHARMACEUTICALS, INC.

SC 13G/A · Feb 14, 2024

9.0%

5.3M shares

UROGEN PHARMA LTD .

SC 13G/A · Feb 14, 2024

10.0%

3.1M shares

NEWAMSTERDAM PHARMA COMPANY N.V.

SC 13G/A · Feb 14, 2024

9.9%

8.2M shares

COGENT BIOSCIENCES, INC.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

HILLEVAX, INC.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

ACLARIS THERAPEUTICS, INC.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

NANOSTRING TECHNOLOGIES, INC.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

PEPGEN INC.

SC 13D/A · Feb 13, 2024

34.1%

10.7M shares

Mineralys Therapeutics, Inc.

SC 13D/A · Feb 12, 2024

10.0%

4.9M shares

Corbus Pharmaceuticals Holdings, Inc.

SC 13G · Feb 12, 2024

4.1%

430K shares

Astria Therapeutics, Inc.

SC 13G · Feb 12, 2024

8.1%

4.4M shares

DIANTHUS THERAPEUTICS, INC.

SC 13G · Feb 1, 2024

10.0%

3.0M shares

EDGEWISE THERAPEUTICS, INC.

SC 13G · Jan 29, 2024

9.6%

8.9M shares

VAXART, INC.

SC 13G · Jan 19, 2024

9.1%

15.4M shares

LONGBOARD PHARMACEUTICALS, INC.

SC 13G · Jan 12, 2024

8.7%

3.1M shares

SOLID BIOSCIENCES INC.

SC 13D/A · Jan 11, 2024

11.7%

4.3M shares

UROGEN PHARMA LTD.

SC 13G · Dec 29, 2023

10.0%

3.1M shares

C4 THERAPEUTICS, INC.

SC 13G · Dec 26, 2023

9.9%

4.9M shares

CONNECT BIOPHARMA HOLDINGS LIMITED

SC 13D/A · Dec 20, 2023

5.6%

3.1M shares

CONNECT BIOPHARMA HOLDINGS LIMITED

SC 13D/A · Dec 14, 2023

9.3%

5.1M shares

89BIO, INC.

SC 13D/A · Dec 13, 2023

13.6%

12.9M shares

CONNECT BIOPHARMA HOLDINGS LIMITED

SC 13D/A · Dec 4, 2023

10.8%

6.0M shares

THIRD HARMONIC BIO, INC.

SC 13G · Nov 27, 2023

5.0%

2.0M shares

N/A

Eliem Therapeutics, Inc.

SC 13D/A · Nov 17, 2023

47.7%

13.2M shares

DESIGN THERAPEUTICS, INC.

SC 13G/A · Nov 14, 2023

0.0%

0 shares