Anaptysbio, Inc
ANAB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001370053
No open-market purchases or sales by Anaptysbio, Inc insiders were filed in the last 90 days; 213 institutions reported holding it in 13F filings for Q2 2026, worth $2.03B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Anaptysbio, Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 208
- +31 vs. Q4 2025
- Shares held
- 28.3M
- +441.4K (+1.6%) vs. Q4 2025
- Total value
- $1.55B
- +$203.4M (+15.1%) vs. Q4 2025
- New holders
- 51
- 59 more added
- Sold out
- 20
- 70 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ANAB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 213 | $2.03B |
| Q1 2026 | 208 | $1.55B |
| Q4 2025 | 179 | $1.42B |
| Q3 2025 | 166 | $980.2M |
| Q2 2025 | 148 | $816.2M |
| Q1 2025 | 153 | $742.8M |
| Q4 2024 | 136 | $468.9M |
| Q3 2024 | 160 | $1.13B |
| Q2 2024 | 135 | $746.6M |
| Q1 2024 | 133 | $658.1M |
| Q4 2023 | 119 | $646.4M |
| Q3 2023 | 116 | $544.5M |
| Q2 2023 | 116 | $614.9M |
| Q1 2023 | 113 | $675.4M |
| Q4 2022 | 118 | $1.02B |
| Q3 2022 | 114 | $830.6M |
| Q2 2022 | 124 | $632.6M |
| Q1 2022 | 131 | $735.4M |
| Q4 2021 | 136 | $964.4M |
| Q3 2021 | 127 | $748.8M |
| Q2 2021 | 122 | $720.6M |
| Q1 2021 | 122 | $628.6M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Anaptysbio, Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Palo Alto Investors LP | 638,161 | $35.4M | 5.41% | −51,871−7.5% | Reduced |
| Vanguard Capital Management LLC | 853,151 | $47.3M | 0.00% | +853,151 | New |
| Affinity Asset Advisors, LLC | 940,000 | $52.1M | 3.06% | +495,308+111.4% | Added |
| State Street Corp | 992,445 | $55.0M | 0.00% | −61,029−5.8% | Reduced |
| Morgan Stanley | 993,905 | $55.1M | 0.00% | −40,657−3.9% | Reduced |
| Tang Capital Management LLC | 1,330,879 | $73.8M | 3.75% | −1,208−0.1% | Reduced |
| BlackRock, Inc. | 1,681,380 | $93.2M | 0.00% | −53,050−3.1% | Reduced |
| EcoR1 Capital, LLC | 7,880,094 | $437.0M | 18.68% | 00.0% | Unchanged |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −356,700−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −25,368−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −24,431−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −24,280−100.0% | Sold out |
| NEOS Investment Management LLC | 0 | $0 | 0.00% | −22,895−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −20,872−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −16,400−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −10,695−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −8,549−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −8,300−100.0% | Sold out |
| Blueshift Asset Management, LLC | 0 | $0 | 0.00% | −7,852−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −7,761−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −6,528−100.0% | Sold out |
| nVerses Capital, LLC | 0 | $0 | 0.00% | −4,438−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −3,174−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −580−100.0% | Sold out |
| Whittier Trust Co | 0 | $0 | 0.00% | −224−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −75−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −54−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |