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Livermore
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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.

Holders of 5% or more of ANAB
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A6.20%1.90M shares−2.20 ppfrom 8.40%Feb 5, 20252 filingsApr 17, 2025SEC
Sirenia Capital Management LP13G/A5.00%1.49M shares−1.70 ppfrom 6.70%May 15, 20262 filingsAug 14, 2026SEC

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

56 Schedule 13D and 13G filings on Anaptysbio, Inc, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on ANAB
Filed (ET)FilerFormStakeChangeEvent dateFiling
Aug 14, 20268:31 AM ETSirenia Capital Management LPand 1 other13G/A5.00%1.49M shares−1.70 ppfrom 6.70%Jun 30, 2026SEC
May 15, 20264:22 PM ETPoint72 Asset Management, L.P.and 2 others13G/A0.20%55.3K shares−7.50 ppfrom 7.70%Below 5%Mar 31, 2026SEC
May 15, 20268:09 AM ETSirenia Capital Management LPand 1 other13G6.70%1.92M sharesNewMar 31, 2026SEC
Mar 26, 20263:43 PM ETVanguard Group Inc13G/A0.00%0 shares−5.23 ppfrom 5.23%Below 5%Mar 13, 2026SEC
Feb 11, 20261:16 PM ETMorgan Stanleyand 1 other13G/A3.60%1.01M shares−2.70 ppfrom 6.30%Below 5%Dec 31, 2025SEC
Jan 16, 20264:16 PM ETMillennium Management LLCand 2 others13G/A2.90%813.6K shares−2.20 ppfrom 5.10%Below 5%Dec 31, 2025SEC
Nov 14, 20254:38 PM ETFirst Light Asset Management, LLCand 1 other13G/A3.12%864.6K shares−4.59 ppfrom 7.71%Below 5%Sep 30, 2025SEC
Nov 12, 20252:04 PM ETGoldman Sachs Group Incand 1 other13G/A4.50%1.25M shares−0.70 ppfrom 5.20%Below 5%Sep 30, 2025SEC
Sep 23, 20254:00 PM ETMillennium Management LLCand 2 others13G5.10%1.43M sharesNewSep 16, 2025SEC
Aug 7, 20254:35 PM ETFirst Light Asset Management, LLCand 1 other13G/A7.71%2.27M shares−7.46 ppfrom 15.17%Jul 31, 2025SEC
Aug 5, 202511:31 AM ETMorgan Stanleyand 1 other13G6.30%1.85M sharesNewJun 30, 2025SEC
Jul 29, 202511:23 AM ETVanguard Group Inc13G5.23%1.54M shares+0.29 ppfrom 4.94%Jun 30, 2025SEC
Jun 6, 202510:03 AM ETFMR LLCand 1 other13G/A0.90%254.2K shares−5.30 ppfrom 6.20%Below 5%May 30, 2025SEC
May 15, 20254:33 PM ETPoint72 Asset Management, L.P.and 2 others13G/A7.70%2.37M shares+2.10 ppfrom 5.60%Mar 31, 2025SEC
May 12, 202511:11 AM ETGoldman Sachs Group Incand 1 other13G5.20%1.59M sharesNewMar 31, 2025SEC
May 12, 202510:24 AM ETFMR LLCand 1 other13G/A6.20%1.91M shares–Mar 31, 2025SEC
Apr 30, 202510:57 AM ETVanguard Group Inc13G/A4.94%1.52M shares–Below 5%Mar 31, 2025SEC
Apr 17, 20259:35 AM ETBlackRock, Inc.13G/A6.20%1.90M shares−2.20 ppfrom 8.40%Mar 31, 2025SEC
Mar 7, 20254:42 PM ETFirst Light Asset Management, LLCand 1 other13G15.17%4.65M sharesNewFeb 28, 2025SEC
Feb 18, 20254:36 PM ETPoint72 Asset Management, L.P.and 2 others13G5.60%1.69M shares–Feb 14, 2025SEC
Feb 14, 20253:45 PM ETFairmount Funds Management LLCand 3 others13G/A0.00%0 shares−5.50 ppfrom 5.50%Below 5%Dec 31, 2024SEC
Feb 14, 202511:27 AM ETFrazier Life Sciences Public Fund, L.P.and 24 others13G/A1.50%463.2K shares−3.90 ppfrom 5.40%Below 5%Jan 31, 2025SEC
Feb 14, 202511:25 AM ETFrazier Life Sciences Public Fund, L.P.and 24 others13G/A5.40%1.66M shares–Dec 31, 2024SEC
Feb 5, 20251:23 PM ETBlackRock, Inc.13G/A8.40%2.55M shares–Dec 31, 2024SEC
Dec 18, 20244:30 PM ETFairmount Funds Management LLCand 3 others13G5.50%1.67M sharesNewDec 11, 2024SEC
Nov 14, 2024Tang Capital Management LLC13G/AOld format–––SEC
Nov 14, 2024Deep Track Capital, LP13G/AOld format–––SEC
Aug 16, 2024EcoR1 Capital, LLC13D/AOld format–––SEC
Jul 10, 2024FMR LLC13GOld format–New–SEC
May 6, 2024Frazier Life Sciences Public Fund, L.P.13GOld format–New–SEC
Feb 14, 2024Tang Capital Partners LP13G/AOld format–––SEC
Feb 14, 2024Deep Track Capital, LP13G/AOld format–––SEC
Feb 14, 2024Point72 Asset Management, L.P.13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Jan 26, 20245:25 PM ETBlackRock Inc.13G/AOld format–––SEC
Oct 2, 2023Deep Track Capital, LP13GOld format–New–SEC
Feb 14, 2023Point72 Asset Management, L.P.13G/AOld format–––SEC
Feb 10, 2023Flynn James E13G/AOld format–––SEC
Feb 9, 202310:39 AM ETFederated Hermes, Inc.13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 1, 20239:49 AM ETFederated Hermes, Inc.13G/AOld format–––SEC
Jan 31, 20235:52 PM ETBlackRock Inc.13G/AOld format–––SEC
Sep 9, 2022Point72 Asset Management, L.P.13GOld format–––SEC
Aug 15, 2022Flynn James E13GOld format–New–SEC
May 10, 202212:08 PM ETFederated Hermes, Inc.13G/AOld format–––SEC
Feb 15, 2022Perceptive Advisors LLC13G/AOld format–––SEC
Feb 14, 20221:34 PM ETFederated Hermes, Inc.13GOld format–New–SEC
Feb 14, 2022Point72 Asset Management, L.P.13G/AOld format–––SEC
Feb 9, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 2, 20227:11 PM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Anaptysbio, Inc shares.

No Form 144 notices for Anaptysbio, Inc are on file.