ANNX · Annexon, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 217 13F filersWho Holds ANNX
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 216 filers, like-for-like change +14.4%; actively managed books +10.1%; index-like books +27.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 42.0% | 112 | +12.8% |
| Exempt adviser | 2.1% | 5 | -31.2% |
| Adviser | 4.2% | 4 | +73.4% |
| Bank | 8.5% | 13 | +1.3% |
| Insurer | 0.0% | 2 | +82.0% |
| Broker-dealer | 0.0% | 2 | +96.0% |
| Benefit plan | 0.3% | 4 | +257.6% |
| Non-US | 2.8% | 7 | -20.1% |
| Holding company | 23.9% | 6 | +57.8% |
| Unknown | 16.3% | 61 | -7.7% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 28.4% | 30 | +27.0% |
| Systematic-like | 11.5% | 32 | +12.5% |
| Concentrated | 21.0% | 22 | -8.3% |
| Diversified active | 39.1% | 132 | +22.5% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 55.6% | 99 | +16.0% |
| Medium turnover | 23.2% | 54 | +6.9% |
| High turnover | 14.9% | 48 | +15.6% |
| Unknown | 6.4% | 15 | +28.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 9.4% | 33 | +16.2% |
| Medium horizon | 15.5% | 29 | +27.9% |
| Long horizon | 57.8% | 128 | +12.8% |
| Unknown | 17.3% | 26 | +8.4% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 9.7% | 40 | +12.5% |
| $1B to $10B | 25.8% | 53 | -0.4% |
| $10B to $100B | 14.3% | 64 | +17.0% |
| $100B or more | 50.2% | 59 | +23.4% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.3% | 34 | -12.2% |
| Pooled investment vehicles | 29.4% | 42 | +10.9% |
| Registered funds and BDCs | 10.1% | 15 | +18.3% |
| Pension and profit sharing plans | 0.1% | 2 | +14.0% |
| Insurance companies | 0.1% | 3 | +28.9% |
| Governments and sovereign funds | 0.9% | 3 | +118.2% |
| Corporations | 0.0% | 1 | 0.0% |
| Other investment advisers | 0.0% | 3 | +250.1% |
| Diversified | 1.2% | 9 | -12.4% |
| Unknown | 58.0% | 104 | +15.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 25.9% | 52 | -1.4% |
| Private equity funds | 2.2% | 7 | +34.4% |
| Venture capital funds | 0.8% | 2 | +343206.4% |
| Real estate funds | 0.0% | 3 | +323.4% |
| Securitized asset funds | 0.1% | 1 | +38.3% |
| Other private funds | 1.8% | 9 | +66.7% |
| Mixed private funds | 3.4% | 2 | +22.3% |
| Private funds, type not stated | 1.1% | 3 | +4.2% |
| No private funds | 8.8% | 38 | +18.7% |
| Unknown | 55.9% | 99 | +18.6% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 92.7% | 175 | +17.7% |
| Outside the US | 7.3% | 41 | -15.7% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-03-31 13F and 2 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC; Trask Adam Roland continues as Burnham & Co LLC.
Conviction and Crowding
216 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $582,658 (0 buying, 1 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 93.6% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies ANNX's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | STOK Stoke Therapeutics, Inc. | 9 |
| 2 | DBVT DBV Technologies S.A. | 7 |
| 3 | COAG Hemab Therapeutics Holdings, Inc. | 6 |
| 4 | FHTX Foghorn Therapeutics Inc. | 5 |
| 5 | SLN Silence Therapeutics plc | 6 |
| 6 | IRON Disc Medicine, Inc. | 8 |
| 7 | MNPR Monopar Therapeutics | 5 |
| 8 | RCUS Arcus Biosciences, Inc. | 6 |
| 9 | QTTB Q32 Bio Inc. | 5 |
| 10 | ENTX Entera Bio Ltd. | 3 |
Shareholder Targets
13F filers that own its peers but not ANNX, quarter ended Jun 30, 2026Found through its holder-overlap peers: STOK, DBVT, COAG, FHTX, SLN, IRON, MNPR, RCUS, QTTB, ENTX, XERS, RARE, ACAD, AGIO, VERA, ZURA, DRUG, GLUE, AMLX, LXRX. 578 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | BAKER BROS. ADVISORS LP Registered adviser, Concentrated | $1,375,626,966 6 held | ACAD, STOK, GLUE |
| 2 | GILEAD SCIENCES, INC. Unknown, Concentrated | $968,825,350 1 held | RCUS |
| 3 | RTW INVESTMENTS, LP Registered adviser, Diversified active | $627,290,719 4 held | RARE, STOK, ACAD |
| 4 | RA CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated | $576,115,230 5 held | COAG, IRON, MNPR |
| 5 | Artal Group S.A. Unknown, Unknown | $420,374,548 1 held | LXRX |
| 6 | TCG Crossover Management, LLC Unknown, Diversified active | $374,273,237 5 held | AMLX, GLUE, IRON |
| 7 | Avoro Capital Advisors LLC Registered adviser, Concentrated | $316,322,793 2 held | VERA, COAG |
| 8 | Deep Track Capital, LP Adviser, Diversified active | $303,944,875 2 held | VERA, COAG |
| 9 | SUVRETTA CAPITAL MANAGEMENT, LLC Registered adviser, Diversified active | $288,869,669 3 held | RCUS, GLUE, ZURA |
| 10 | Vestal Point Capital, LP Registered adviser, Diversified active | $276,883,902 5 held | IRON, GLUE, DRUG |
Fund Ownership of ANNX by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 13.72% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 2.35% | 4,801,952 |
| Index ETFs | 11.38% | 23,257,884 |
| Active ETFs | 0.84% | 1,723,943 |
| Active funds | 10.70% | 21,865,685 |
| Unclassified | 0.00% | 9,567 |
| All registered funds | 25.27% | 51,659,031 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega FMR LLC Holding company | $111,450,610 | 10.85% | 19,518,496 | Shares | 2026-08-13 | |
| Mega BlackRock, Inc. Holding company | $77,311,931 | 7.52% | 13,539,744 | Shares | 2026-08-07 | |
| Mid Redmile Group, LLC Registered adviser | $67,776,997 | 6.60% | 11,869,877 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $56,096,872 | 5.46% | 9,824,321 | Shares | 2026-09-22 | |
| Mid BVF INC/IL | $49,666,567 | 4.83% | 8,698,173 | Shares | 2026-08-14 | |
| Large Woodline Partners LP Registered adviser | $39,542,132 | 3.85% | 6,925,067 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $39,233,495 | 3.82% | 6,871,015 | Shares | 2026-08-13 | |
| Small MAK CAPITAL ONE LLC Registered adviser | $33,473,047 | 3.26% | 5,862,180 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $33,264,054 | 3.24% | 5,825,579 | Shares | 2026-08-14 | |
| Mid Siren, L.L.C. | $25,458,868 | 2.48% | 4,458,646 | Shares | 2026-08-13 | |
| Mid Bain Capital Life Sciences Investors, LLC | $25,339,444 | 2.47% | 4,437,731 | Shares | 2026-08-14 | |
| Mid Bellevue Group AG Non-US | $23,411,091 | 2.28% | 4,100,016 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $23,052,371 | 2.24% | 4,037,193 | Shares | 2026-08-12 | |
| Mid MPM BIOIMPACT LLC Adviser | $20,238,261 | 1.97% | 3,544,354 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $20,039,945 | 1.95% | 3,509,623 | Shares | 2026-08-14 | |
| Small GREAT POINT PARTNERS LLC Registered adviser | $19,985,000 | 1.94% | 3,500,000 | Shares | 2026-08-14 | |
| Large ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser | $19,985,000 | 1.94% | 3,500,000 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $17,954,823 | 1.75% | 3,144,453 | Shares | 2026-08-13 | |
| Small Palo Alto Investors LP Registered adviser | $16,833,593 | 1.64% | 2,948,090 | Shares | 2026-08-19 | |
| Large Balyasny Asset Management L.P. Registered adviser | $16,164,872 | 1.57% | 2,830,976 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $15,788,605 | 1.54% | 2,765,080 | Shares | 2026-08-11 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $15,702,277 | 1.53% | 2,749,961 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $12,829,228 | 1.25% | 2,246,800 | Shares | 2026-08-13 | |
| Mid Opaleye Management Inc. Registered adviser | $9,789,515 | 0.95% | 1,714,451 | Shares | 2026-08-14 | |
| Mid Logos Global Management LP Registered adviser | $8,565,000 | 0.83% | 1,500,000 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $8,552,184 | 0.83% | 1,497,756 | Shares | 2026-08-11 | |
| Large Point72 Asset Management, L.P. Registered adviser | $7,895,211 | 0.77% | 1,382,699 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $7,720,180 | 0.75% | 1,352,046 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $7,182,032 | 0.70% | 1,257,799 | Shares | 2026-08-14 | |
| Small Tetragon Partners GP Ltd | $7,094,418 | 0.69% | 1,242,455 | Shares | 2026-08-13 | |
| Large Candriam S.C.A. Registered adviser | $6,824,260 | 0.66% | 1,195,142 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $6,765,956 | 0.66% | 1,184,931 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $6,312,119 | 0.61% | 1,105,450 | Shares | 2026-08-13 | |
| Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser | $5,923,359 | 0.58% | 1,037,366 | Shares | 2026-08-03 | |
| Mega JPMORGAN CHASE & CO Bank | $5,734,597 | 0.56% | 1,004,308 | Shares | 2026-08-12 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $5,584,692 | 0.54% | 978,055 | Shares | 2026-08-14 | |
| Large PANAGORA ASSET MANAGEMENT INC Registered adviser | $5,526,857 | 0.54% | 967,926 | Shares | 2026-08-06 | |
| Mid Y-Intercept (Hong Kong) Ltd Exempt adviser | $5,487,304 | 0.53% | 1,297,235 | Shares | 2026-10-16 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC Registered adviser | $5,129,829 | 0.50% | 898,394 | Shares | 2026-08-14 | |
| Small Ishara Investments LP Registered adviser | $4,682,200 | 0.46% | 820,000 | Shares | 2026-08-14 | |
| Large Ensign Peak Advisors, Inc | $4,570,946 | 0.44% | 800,516 | Shares | 2026-08-14 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $4,213,608 | 0.41% | 737,935 | Shares | 2026-08-13 | |
| Mega Russell Investments Group, Ltd. | $4,027,209 | 0.39% | 705,291 | Shares | 2026-08-06 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $3,950,243 | 0.38% | 691,812 | Shares | 2026-08-14 | |
| Small Parkman Healthcare Partners LLC Registered adviser | $3,660,275 | 0.36% | 641,029 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $3,592,315 | 0.35% | 629,127 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $3,557,866 | 0.35% | 623,094 | Shares | 2026-08-13 | |
| Mega DEUTSCHE BANK AG\ Non-US | $3,520,150 | 0.34% | 616,489 | Shares | 2026-08-07 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $3,507,001 | 0.34% | 614,186 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $3,406,482 | 0.33% | 596,582 | Shares | 2026-09-02 | |
| Mid DEERFIELD MANAGEMENT COMPANY, L.P. Registered adviser | $3,334,143 | 0.32% | 583,913 | Shares | 2026-08-14 | |
| Small SIRIOS CAPITAL MANAGEMENT L P Registered adviser | $3,250,565 | 0.32% | 569,276 | Shares | 2026-08-14 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $3,046,667 | 0.30% | 533,567 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $2,928,065 | 0.28% | 512,796 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $2,863,232 | 0.28% | 501,442 | Shares | 2026-08-06 | |
| Small Board of Trustees of The Leland Stanford Junior University | $2,755,360 | 0.27% | 482,550 | Shares | 2026-08-12 | |
| Mid Hennion & Walsh Asset Management, Inc. | $2,622,705 | 0.26% | 620,025 | Shares | 2026-10-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $2,620,890 | 0.26% | 459,000 | Shares | 2026-08-13 | |
| Small Ikarian Capital, LLC Registered adviser | $2,456,693 | 0.24% | 430,244 | Shares | 2026-08-14 | |
| Mid MOORE CAPITAL MANAGEMENT, LP Registered adviser | $2,428,645 | 0.24% | 425,332 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $2,352,520 | 0.23% | 412,000 | Call | 2026-08-14 | |
| Large Trexquant Investment LP Registered adviser | $2,339,198 | 0.23% | 409,667 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $2,322,798 | 0.23% | 406,795 | Shares | 2026-08-14 | |
| Mid Susquehanna Portfolio Strategies, LLC | $2,256,763 | 0.22% | 395,230 | Shares | 2026-08-14 | |
| Large MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC Registered adviser | $2,253,166 | 0.22% | 394,600 | Shares | 2026-08-11 | |
| Small DIADEMA PARTNERS LP Registered adviser | $2,016,772 | 0.20% | 353,200 | Call | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $1,888,461 | 0.18% | 330,729 | Shares | 2026-08-14 | |
| Mid Engineers Gate Manager LP | $1,821,815 | 0.18% | 319,057 | Shares | 2026-08-14 | |
| Small DAFNA Capital Management LLC Registered adviser | $1,700,506 | 0.17% | 297,812 | Shares | 2026-08-14 | |
| Mid Jump Financial, LLC | $1,700,438 | 0.17% | 297,800 | Shares | 2026-08-13 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $1,635,201 | 0.16% | 286,375 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $1,514,771 | 0.15% | 265,284 | Shares | 2026-08-14 | |
| Large VOLORIDGE INVESTMENT MANAGEMENT, LLC Registered adviser | $1,427,642 | 0.14% | 250,025 | Shares | 2026-08-14 | |
| Mega Swiss National Bank | $1,396,666 | 0.14% | 244,600 | Shares | 2026-08-11 | |
| Mega CITIGROUP INC Bank | $1,347,502 | 0.13% | 235,990 | Shares | 2026-08-03 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $1,340,137 | 0.13% | 234,700 | Call | 2026-09-02 | |
| Mid Cinctive Capital Management LP Registered adviser | $1,231,921 | 0.12% | 215,748 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $1,202,565 | 0.12% | 210,607 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,086,042 | 0.11% | 190,200 | Put | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $1,082,490 | 0.11% | 189,578 | Shares | 2026-08-12 | |
| Mega SEI INVESTMENTS CO | $1,049,594 | 0.10% | 183,817 | Shares | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $1,031,492 | 0.10% | 180,647 | Shares | 2026-08-13 | |
| Large Squarepoint Ops LLC Registered adviser | $989,457 | 0.10% | 173,285 | Shares | 2026-08-14 | |
| Large Rafferty Asset Management, LLC Registered adviser | $989,423 | 0.10% | 173,279 | Shares | 2026-08-14 | |
| Large OSAIC HOLDINGS, INC. Holding company | $842,932 | 0.08% | 147,624 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $840,740 | 0.08% | 147,240 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $766,618 | 0.07% | 134,259 | Shares | 2026-08-24 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $737,977 | 0.07% | 129,243 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $727,099 | 0.07% | 127,338 | Shares | 2026-08-07 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC Registered adviser | $685,936 | 0.07% | 120,129 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC Registered adviser | $685,257 | 0.07% | 120,010 | Shares | 2026-08-11 | |
| Mid J. Goldman & Co LP Registered adviser | $662,622 | 0.06% | 116,046 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $640,359 | 0.06% | 112,147 | Shares | 2026-08-14 | |
| Mid GSA CAPITAL PARTNERS LLP Registered adviser | $595,998 | 0.06% | 104,378 | Shares | 2026-08-06 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $582,802 | 0.06% | 102,067 | Shares | 2026-08-13 | |
| Mid Quarry LP | $571,000 | 0.06% | 100,000 | Shares | 2026-08-14 | |
| Mid SCS Capital Management LLC Registered adviser | $565,290 | 0.06% | 99,000 | Shares | 2026-08-06 | |
| Mega Legal & General Group Plc | $560,252 | 0.05% | 98,118 | Shares | 2026-08-14 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $523,383 | 0.05% | 91,661 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC Registered adviser | $519,638 | 0.05% | 91,005 | Shares | 2026-08-14 |
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