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Baker Bros. Advisors LP

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

Total Filings

174

Stocks Covered

68

Latest Filing

Feb 17, 2026

Filings

Mirati Therapeutics, Inc.

SC 13G · Feb 14, 2024

0.0%

0 shares

AbCellera Biologics Inc.

SC 13G · Feb 14, 2024

7.9%

22.9M shares

2seventy bio, Inc.

SC 13G/A · Feb 14, 2024

5.0%

2.5M shares

Adaptimmune Therapeutics plc

SC 13G/A · Feb 14, 2024

4.8%

65.8M shares

Zymeworks Inc.

SC 13G/A · Feb 14, 2024

0.0%

27K shares

Inozyme Pharma, Inc.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

Achilles Therapeutics plc

SC 13G/A · Feb 14, 2024

8.1%

3.3M shares

Aligos Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

5.0%

3.7M shares

Athira Pharma, Inc.

SC 13G · Feb 14, 2024

8.3%

3.2M shares

Sagimet Biosciences Inc.

SC 13G · Feb 14, 2024

6.8%

1.5M shares

Nurix Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

10.0%

5.0M shares

Aravive, Inc.

SC 13G/A · Feb 14, 2024

5.0%

3.9M shares

BioCryst Pharmaceuticals, Inc.

SC 13G/A · Feb 14, 2024

4.9%

10.1M shares

Cabaletta Bio, Inc.

SC 13G/A · Feb 14, 2024

3.4%

1.5M shares

Ascendis Pharma A/S

SC 13G/A · Feb 14, 2024

0.0%

0 shares

Akero Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

4.3%

2.4M shares

Spyre Therapeutics, Inc. (f/k/a Aeglea Biotherapeutics, Inc.)

SC 13G/A · Feb 14, 2024

0.0%

0 shares

Cyteir Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

0.0%

0 shares

HOOKIPA Pharma Inc.

SC 13G/A · Feb 14, 2024

10.0%

8.1M shares

Aerovate Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

6.1%

1.7M shares

Heron Therapeutics, Inc.

SC 13G/A · Feb 14, 2024

5.0%

7.9M shares

Rhythm Pharmaceuticals, Inc.

SC 13G/A · Feb 14, 2024

10.8%

6.4M shares

Cerus Corporation

SC 13G/A · Feb 14, 2024

10.7%

19.5M shares

Immatics N.V.

SC 13G/A · Feb 14, 2024

6.9%

5.8M shares

Monte Rosa Therapeutics, Inc.

SC 13G · Feb 14, 2024

9.8%

4.9M shares

Opthea Limited

SC 13G/A · Feb 14, 2024

4.2%

28.1M shares

Biomea Fusion, Inc.

SC 13G/A · Feb 14, 2024

5.9%

2.1M shares

KALA BIO, Inc. (f/k/a Kala Pharmaceuticals, Inc.)

SC 13G/A · Feb 14, 2024

10.0%

269K shares

Bicycle Therapeutics plc

SC 13G · Feb 12, 2024

12.8%

4.8M shares

Immunocore Holdings plc

SC 13D/A · Feb 1, 2024

5.0%

2.5M shares

Sera Prognostics, Inc.

SC 13G · Jan 10, 2024

17.9%

5.4M shares

Replimune Group, Inc.

SC 13G/A · Jan 10, 2024

16.2%

9.5M shares

Atreca, Inc.

SC 13G · Jan 10, 2024

20.0%

7.7M shares

Kymera Therapeutics, Inc.

SC 13G/A · Jan 10, 2024

10.8%

6.0M shares

Neurogene Inc. (f/k/a Neoleukin Therapeutics, Inc.)

SC 13D/A · Dec 20, 2023

5.0%

650K shares

Seagen Inc.

SC 13D/A · Dec 18, 2023

0.0%

0 shares

IGM Biosciences, Inc.

SC 13D/A · Dec 15, 2023

11.4%

3.7M shares

Prelude Therapeutics Incorporated

SC 13D/A · Dec 13, 2023

24.3%

10.2M shares

Bellicum Pharmaceuticals, Inc.

SC 13D/A · Nov 24, 2023

20.0%

2.4M shares

Madrigal Pharmaceuticals, Inc.

SC 13D/A · Nov 21, 2023

10.0%

2.0M shares

BeiGene, Ltd.

SC 13D/A · Nov 14, 2023

10.2%

138.2M shares

Cerus Corporation

SC 13G/A · Nov 13, 2023

10.5%

19.1M shares

Neoleukin Therapeutics, Inc.

SC 13D/A · Oct 10, 2023

20.0%

1.9M shares

Madrigal Pharmaceuticals, Inc.

SC 13D/A · Oct 5, 2023

10.0%

2.0M shares

Neoleukin Therapeutics, Inc.

SC 13D/A · Aug 17, 2023

20.0%

9.5M shares

Mereo BioPharma Group plc

SC 13G/A · Aug 10, 2023

2.2%

14.6M shares

Verastem, Inc.

SC 13G/A · Aug 10, 2023

0.0%

0 shares

Madrigal Pharmaceuticals, Inc.

SC 13D/A · Aug 8, 2023

8.4%

1.5M shares

Neoleukin Therapeutics, Inc.

SC 13D/A · Jul 19, 2023

20.0%

10.0M shares

IGM Biosciences, Inc.

SC 13D/A · Jun 28, 2023

10.0%

3.3M shares