ANAB Institutional Ownership & Shareholders
ANAPTYSBIO INC (ANAB) is currently held by 207 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $2.05B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Ecor1 Capital, Llc is currently the largest disclosed institutional shareholder of ANAB tracked by InsiderSet, reporting ownership valued at approximately $531.91M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $380.45M, representing an estimated loss of -28.47% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 56% of the total disclosed ANAB value among the investors covered in this analysis. Major shareholders include Ecor1 Capital, Llc, Blackrock, Inc., Tang Capital Management Llc, and several other long-term asset managers with concentrated positions in ANAPTYSBIO INC (ANAB).
This page ranks the largest institutional ANAB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
207
Total Reported Value
$2.05B
Largest Holder
Ecor1 Capital, Llc
Largest Position
$531.91M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
81
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ecor1 Capital, Llc | 26.37% | 7,880,094 | $531,906,345 | $380,450,938 | -$151,455,407 | -28.47% | |
| Blackrock, Inc. | 0.00% | 1,844,049 | $124,473,310 | $89,030,686 | -$35,442,624 | -28.47% | |
| Tang Capital Management Llc | 4.08% | 1,330,879 | $89,834,333 | $64,254,838 | -$25,579,495 | -28.47% | |
| State Street Corp | 0.00% | 1,286,194 | $86,818,095 | $62,097,446 | -$24,720,649 | -28.47% | |
| Vanguard Capital Management Llc | 0.00% | 906,233 | $61,170,728 | $43,752,929 | -$17,417,799 | -28.47% | |
| Affinity Asset Advisors, Llc | 2.73% | 826,109 | $55,762,358 | $39,884,543 | -$15,877,815 | -28.47% | |
| Sanofi | 10.39% | 821,917 | $55,479,398 | $39,682,153 | -$15,797,245 | -28.47% | |
| Millennium Management Llc | 0.04% | 807,316 | $54,493,830 | $38,977,216 | -$15,516,614 | -28.47% | |
| Woodline Partners Lp | 0.15% | 717,014 | $48,398,445 | $34,617,436 | -$13,781,009 | -28.47% | |
| 683 Capital Management, Llc | 4.10% | 660,000 | $44,550,001 | $31,864,800 | -$12,685,201 | -28.47% | |
| Geode Capital Management, Llc | 0.00% | 637,873 | $43,064,353 | $30,796,508 | -$12,267,845 | -28.49% | |
| Palo Alto Investors Lp | 5.63% | 603,489 | $40,735,508 | $29,136,449 | -$11,599,059 | -28.47% | |
| Goldman Sachs Group Inc | 0.00% | 584,070 | $39,424,725 | $28,198,900 | -$11,225,825 | -28.47% | |
| First Light Asset Management, Llc | 2.39% | 582,004 | $39,285,270 | $28,099,153 | -$11,186,117 | -28.47% | |
| D. E. Shaw & Co., Inc. | 0.02% | 539,666 | $36,427,456 | $26,055,074 | -$10,372,382 | -28.47% | |
| Vanguard Portfolio Management Llc | 0.00% | 527,858 | $35,630,415 | $25,484,984 | -$10,145,431 | -28.47% | |
| Apis Capital Advisors, Llc | 3.27% | 497,000 | $33,547,500 | $23,995,160 | -$9,552,340 | -28.47% | |
| Sofinnova Investments, Inc. | 1.78% | 493,536 | $33,313,680 | $23,827,918 | -$9,485,762 | -28.47% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 488,651 | $32,983,943 | $23,592,070 | -$9,391,873 | -28.47% | |
| Nuveen, Llc | 0.01% | 420,664 | $28,394,821 | $20,309,658 | -$8,085,163 | -28.47% | |
| Bank Of America Corp | 0.00% | 417,812 | $28,202,310 | $20,171,963 | -$8,030,347 | -28.47% | |
| Citadel Advisors Llc | 0.02% | 394,373 | $26,620,178 | $19,040,328 | -$7,579,850 | -28.47% | |
| Federated Hermes, Inc. | 0.04% | 391,667 | $26,437,523 | $18,909,683 | -$7,527,840 | -28.47% | |
| Squarepoint Ops Llc | 0.04% | 324,446 | $21,900,105 | $15,664,253 | -$6,235,852 | -28.47% | |
| Two Sigma Investments, Lp | 0.01% | 262,995 | $17,752,163 | $12,697,399 | -$5,054,764 | -28.47% | |
| First Trust Advisors Lp | 0.01% | 258,989 | $17,481,757 | $12,503,989 | -$4,977,768 | -28.47% | |
| Morgan Stanley | 0.00% | 257,091 | $17,353,682 | $12,412,353 | -$4,941,329 | -28.47% | |
| Coppell Advisory Solutions Llc | 1.37% | 3,638 | $16,575,695 | $175,643 | -$16,400,052 | -98.94% | |
| Fmr Llc | 0.00% | 240,511 | $16,234,486 | $11,611,871 | -$4,622,615 | -28.47% | |
| Qube Research & Technologies Ltd | 0.02% | 228,777 | $15,442,448 | $11,045,354 | -$4,397,094 | -28.47% | |
| Hsbc Holdings Plc | 0.01% | 216,949 | $14,928,261 | $10,474,298 | -$4,453,963 | -29.84% | |
| Empowered Funds, Llc | 0.07% | 206,010 | $13,905,675 | $9,946,163 | -$3,959,512 | -28.47% | |
| Northern Trust Corp | 0.00% | 202,767 | $13,686,773 | $9,789,591 | -$3,897,182 | -28.47% | |
| Charles Schwab Investment Management Inc | 0.00% | 202,305 | $13,655,588 | $9,767,285 | -$3,888,303 | -28.47% | |
| Invesco Ltd. | 0.00% | 202,056 | $13,638,781 | $9,755,264 | -$3,883,517 | -28.47% | |
| Dimensional Fund Advisors Lp | 0.00% | 185,444 | $12,517,471 | $8,953,236 | -$3,564,235 | -28.47% | |
| Greenhaven Road Investment Management, L.P. | 7.50% | 171,059 | $11,546,483 | $8,258,729 | -$3,287,754 | -28.47% | |
| Victory Capital Management Inc | 0.01% | 169,227 | $11,422,823 | $8,170,280 | -$3,252,543 | -28.47% | |
| Ubs Group Ag | 0.00% | 146,832 | $9,911,161 | $7,089,049 | -$2,822,112 | -28.47% | |
| Vanguard Fiduciary Trust Co | 0.00% | 146,724 | $9,903,870 | $7,083,835 | -$2,820,035 | -28.47% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | 141,026 | $9,519,256 | $6,808,735 | -$2,710,521 | -28.47% | |
| Mackenzie Financial Corp | 0.01% | 186,688 | $9,382,939 | $9,013,297 | -$369,642 | -3.94% | |
| Ensign Peak Advisors, Inc | 0.01% | 125,633 | $6,967,606 | $6,065,561 | -$902,045 | -12.95% | |
| Citigroup Inc | 0.00% | 99,114 | $6,690,195 | $4,785,224 | -$1,904,971 | -28.47% | |
| Nomura Asset Management International Inc. | 0.01% | 93,732 | $6,327,000 | $4,525,381 | -$1,801,619 | -28.48% | |
| Prudential Financial Inc | 0.01% | 85,932 | $5,800,410 | $4,148,797 | -$1,651,613 | -28.47% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 0.00% | 83,942 | $5,666,085 | $4,052,720 | -$1,613,365 | -28.47% | |
| Jpmorgan Chase & Co | 0.00% | 80,236 | $5,293,169 | $3,873,794 | -$1,419,375 | -26.82% | |
| Granahan Investment Management, Llc | 0.18% | 75,962 | $5,127,435 | $3,667,445 | -$1,459,990 | -28.47% | |
| Principal Financial Group Inc | 0.00% | 101,767 | $5,114,809 | $4,913,311 | -$201,498 | -3.94% |
Frequently asked questions about ANAB
Who are the largest institutional holders of ANAB?
The largest institutional holders of ANAB reported in the latest SEC Form 13F filings include Ecor1 Capital, Llc, Blackrock, Inc., Tang Capital Management Llc, State Street Corp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported ANAB position.
What is ANAB institutional ownership?
This page tracks ANAB positions reported by institutional investment managers through SEC Form 13F. ANAPTYSBIO INC (ANAB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ANAB?
InsiderSet currently tracks 207 institutional managers reporting ANAB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ANAB shareholders.
How much ANAB stock do institutions own?
Institutional investment managers disclosed approximately $2.05B in ANAB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ANAB institutional ownership last updated?
The latest ANAB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ANAB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ANAB position after the reporting date.
Are institutions buying or selling ANAB?
Institutional buying and selling can be analyzed by comparing ANAB positions across consecutive 13F reporting periods. InsiderSet's ANAB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ANAB ownership changes.
How has ANAB institutional ownership changed over time?
InsiderSet tracks ANAB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.