ANAB Institutional Ownership
Who owns Anaptysbio, Inc and what the big funds did with it last quarter, from every SEC 13F filing. 213 funds reported holding ANAB at Jun 30, 2026, together owning 100.8% of the company.
- ●117 buying vs 102 selling
- ▲Held by funds +6.3 pts
- ▲Funds holding +5
- ●Superinvestors: 2 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 213 | 208 | +2.4% |
| In funds' top 10 | 7 | 6 | +16.7% |
| 13F shares | 30.1M | 28.3M | +6.7% |
| Held by funds | 100.8% | 94.5% | +6.3 pts |
| New positions | 44 | 45 | −2.2% |
| Increased | 73 | 58 | +25.9% |
| Reduced | 65 | 68 | −4.4% |
| Sold out | 37 | 21 | +76.2% |
| Calls (shares) | 15K | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | 0.00 | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ANAB
All superinvestors →
Who owns ANAB
share of fund held shares- Index and passive funds21.4%
- Active managers and hedge funds70.7%
- Banks and brokers7.4%
- Pensions, insurers and other0.5%
The top 10 holders own 56.7% of all ANAB shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
40 funds changed their position- Principal Financial Group IncNew+102K sh
- Moody Aldrich Partners LLCAdded+51K sh
- Burney Co/Added+46K sh
- Hussman Strategic Advisors, Inc.Added+42K sh
- Mackenzie Financial CorpAdded+36K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | EcoR1 Capital, LLC | 26.36% | 7.9M | $532M | 0 |
| 2 | BlackRock, Inc. | 6.17% | 1.8M | $124M | +163K |
| 3 | Tang Capital Management LLC | 4.45% | 1.3M | $89.8M | 0 |
| 4 | State Street Corp | 4.30% | 1.3M | $86.8M | +294K |
| 5 | Vanguard Capital Management LLC | 3.03% | 906K | $61.2M | +53K |
| 6 | Affinity Asset Advisors, LLC | 2.76% | 826K | $55.8M | −114K |
| 7 | Sanofi | 2.75% | 822K | $55.5M | 0 |
| 8 | Millennium Management LLC | 2.70% | 807K | $54.5M | +332K |
| 9 | Woodline Partners LP | 2.40% | 717K | $48.4M | +373K |
| 10 | 683 Capital Management, LLC | 2.21% | 660K | $44.6M | +35K |
- Woodline Partners LP+373K sh+$25.2M
- Millennium Management LLC+332K sh+$22.4M
- State Street Corp+294K sh+$19.8M
- Apis Capital Advisors, LLC+259K sh+$17.5M
- First Trust Advisors LP+259K sh+$17.5M
- Goldman Sachs Group Inc+251K sh+$17M
- Sofinnova Investments, Inc.+245K sh+$16.6M
- Empowered Funds, LLC+206K sh+$13.9M
- Morgan Stanley−737K sh−$49.7M
- Synergy Asset Management, LLC−317K sh−$17.6M
- Fmr LLC−232K sh−$15.7M
- Two Sigma Investments, LP−202K sh−$13.6M
- Affinity Asset Advisors, LLC−114K sh−$7.7M
- Bnp Paribas Financial Markets−89K sh−$6M
- Bank of America Corp /de/−83K sh−$5.6M
- Jane Street Group, LLC−86K sh−$4.8M
ANAB institutional ownership FAQ
Who owns the most ANAB stock?
In Q2 2026 13F filings the largest holder of ANAB was EcoR1 Capital, LLC, followed by BlackRock, Inc. and Tang Capital Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of ANAB is owned by institutions?
Funds that file 13F reports held 100.8% of ANAB's shares at Jun 30, 2026, compared with 94.5% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ANAB?
In Q2 2026, 117 funds bought ANAB (44 of them new positions) and 102 sold (37 sold out completely). Among well known investors, 2 added and 2 cut. Our fund sentiment for ANAB is bullish.
What is ANAB's institutional put/call ratio?
Funds reported $0 of ANAB puts against $1M of calls, a put/call ratio of 0.00. Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this ANAB ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.