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.
Holders of 5% or more of ANAB
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Anaptysbio, Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 6.20%1.90M shares | −2.20 ppfrom 8.40% | Feb 5, 20252 filings | Apr 17, 2025 | SEC |
| Sirenia Capital Management LP | 13G/A | 5.00%1.49M shares | −1.70 ppfrom 6.70% | May 15, 20262 filings | Aug 14, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
62 Schedule 13D and 13G filings on Anaptysbio, Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| May 11, 2021 | EcoR1 Capital, LLC | 13D/AOld format | – | – | – | SEC |
| Apr 13, 2021 | EcoR1 Capital, LLC | 13D/AOld format | – | – | – | SEC |
| Mar 10, 2021 | EcoR1 Capital, LLC | 13DOld format | – | – | – | SEC |
| Mar 10, 2021 | EcoR1 Capital Fund, L.P. | 13DOld format | – | New | – | SEC |
| Feb 16, 2021 | Tang Capital Partners LP | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | State Street Corp | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Biotechnology Value Fund L P | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2021 | Perceptive Advisors LLC | 13GOld format | – | New | – | SEC |
| Jan 28, 20215:56 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 14, 2021 | EcoR1 Capital, LLC | 13G/AOld format | – | – | – | SEC |
| Jan 13, 2021 | Point72 Asset Management, L.P. | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
42 notices from officers, directors and other affiliates planning to sell Anaptysbio, Inc shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Mar 30, 20265:28 PM ET | John SchmidDirector | 20.6K | $1.16M | Mar 30, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 11, 20264:36 PM ET | Eric J LoumeauOfficer | 10.0K | $540.0K | Feb 11, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 15, 20264:06 PM ET | Magda MarquetDirector | 11.0K | $530.5K | Jan 15, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 9, 20267:15 PM ET | Paul F. LizzulOfficer | 3.65K | $165.0K | Jan 8, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 9, 20267:14 PM ET | Dennis MulroyOfficer | 2.52K | $113.7K | Jan 8, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 9, 20267:12 PM ET | Eric J LoumeauOfficer | 2.21K | $99.9K | Jan 8, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 9, 20267:11 PM ET | Daniel FagaOfficer | 14.3K | $645.6K | Jan 8, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 8, 20264:12 PM ET | Eric J LoumeauOfficer | 2.02K | $88.6K | Jan 7, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 8, 20264:10 PM ET | Paul F. LizzulOfficer | 2.23K | $98.1K | Jan 7, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 8, 20264:09 PM ET | Daniel FagaOfficer | 9.20K | $404.1K | Jan 7, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 8, 20264:08 PM ET | Dennis MulroyOfficer | 1.91K | $83.8K | Jan 7, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 7, 20264:06 PM ET | Eric J LoumeauOfficer | 7.62K | $348.2K | Jan 7, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 6, 20269:07 PM ET | Daniel FagaOfficer | 15.3K | $688.1K | Jan 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 6, 20269:05 PM ET | Dennis MulroyOfficer | 3.36K | $151.2K | Jan 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 6, 20269:04 PM ET | Paul F. LizzulOfficer | 4.22K | $189.6K | Jan 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jan 6, 20269:02 PM ET | Eric J LoumeauOfficer | 2.98K | $134.1K | Jan 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 23, 20254:03 PM ET | Joe Anthony WareDirector | 3.90K | $193.3K | Dec 23, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 22, 20254:05 PM ET | Eric J LoumeauOfficer | 10.0K | $510.0K | Dec 22, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 22, 20254:04 PM ET | Paul F LizzulOfficer | 1.50K | $75.0K | Dec 22, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 22, 20254:01 PM ET | Dennis MulroyOfficer | 10.0K | $500.0K | Dec 22, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 18, 20254:11 PM ET | Eric J LoumeauOfficer | 141 | $6.63K | Dec 18, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 17, 20254:12 PM ET | Eric J LoumeauOfficer | 10.0K | $460.0K | Dec 17, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 16, 20254:58 PM ET | Dennis MulroyOfficer | 15.7K | $705.3K | Dec 16, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Dec 16, 20254:09 PM ET | Eric J LoumeauOfficer | 12.5K | $560.8K | Dec 16, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 30, 20254:13 PM ET | Eric J LoumeauOfficer | 8.24K | $239.0K | Sep 30, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
Showing the latest 25. See the ANAB notices from the last 12 months