Institutional HoldersBeta
Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.
Share classes (cover page of the 20-F filed 2026-03-05, as of 2025-12-31)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | IMTX · NASDAQ | 134,071,432 | 99,798,104 | 74.4% | 82 | N44445109 |
Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.
Top holders (82 of 82 · N44445109)
change vs 2026-03-31| # | Filer | Shares | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | T. Rowe Price Investment Management, Inc. | 22,365,046 | 16.68% | $226.6M | +712,884 (+3.3%) |
| 2 | RTW INVESTMENTS, LP | 12,946,176 | 9.66% | $131.1M | +76,836 (+0.6%) |
| 3 | MONTANOVA CAPITAL, LLC | 11,190,129 | 8.35% | $113.4M | — |
| 4 | PERCEPTIVE ADVISORS LLC | 10,383,456 | 7.74% | $105.2M | — |
| 5 | BAKER BROS. ADVISORS LP | 9,508,565 | 7.09% | $96.3M | -1,408,128 (-12.9%) |
| 6 | Jefferies Financial Group Inc. | 6,506,802 | 4.85% | $65.9M | +1,447,251 (+28.6%) |
| 7 | Vestal Point Capital, LP | 6,175,000 | 4.61% | $62.6M | — |
| 8 | Sofinnova Investments, Inc. | 3,669,346 | 2.74% | $37.2M | +38,892 (+1.1%) |
| 9 | MORGAN STANLEY | 2,186,494 | 1.63% | $22.1M | +37,412 (+1.7%) |
| 10 | CITADEL ADVISORS LLC | 1,814,657 | 1.35% | $18.4M | -37,306 (-2.0%) |
| 11 | WELLINGTON MANAGEMENT GROUP LLP | 1,647,852 | 1.23% | $16.7M | +85,960 (+5.5%) |
| 12 | Point72 Asset Management, L.P. | 1,449,597 | 1.08% | $14.7M | -44,203 (-3.0%) |
| 13 | Woodline Partners LP | 900,736 | 0.67% | $9.1M | -99,861 (-10.0%) |
| 14 | SPHERA FUNDS MANAGEMENT LTD. | 720,057 | 0.54% | $7.3M | +23,952 (+3.4%) |
| 15 | UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO | 697,431 | 0.52% | $7.1M | — |
| 16 | Aberdeen Group plc | 653,604 | 0.49% | $6.6M | -167,113 (-20.4%) |
| 17 | Qube Research & Technologies Ltd | 523,217 | 0.39% | $5.3M | +156,445 (+42.7%) |
| 18 | Boxer Capital Management, LLC | 475,000 | 0.35% | $4.8M | NEW |
| 19 | TD Asset Management Inc | 449,348 | 0.34% | $4.6M | -21,096 (-4.5%) |
| 20 | WASATCH ADVISORS LP | 441,510 | 0.33% | $4.5M | -23,313 (-5.0%) |
| 21 | STATE STREET CORP | 419,698 | 0.31% | $4.3M | -37,300 (-8.2%) |
| 22 | PRICE T ROWE ASSOCIATES INC /MD/ | 410,712 | 0.31% | $4.2M | -241,458 (-37.0%) |
| 23 | Balyasny Asset Management L.P. | 401,643 | 0.30% | $4.1M | -581,221 (-59.1%) |
| 24 | GOLDMAN SACHS GROUP INC | 384,171 | 0.29% | $3.9M | +168,193 (+77.9%) |
| 25 | SECTORAL ASSET MANAGEMENT INC | 224,928 | 0.17% | $2.3M | +158,098 (+236.6%) |
| 26 | Atom Investors LP | 216,365 | 0.16% | $2.2M | -37,775 (-14.9%) |
| 27 | SCHRODER INVESTMENT MANAGEMENT GROUP | 197,300 | 0.15% | $1.9M | -205,052 (-51.0%) |
| 28 | MOORE CAPITAL MANAGEMENT, LP | 192,770 | 0.14% | $2.0M | NEW |
| 29 | Tidal Investments LLC | 171,499 | 0.13% | $1.7M | +1,110 (+0.7%) |
| 30 | Burkehill Global Management, LP | 150,000 | 0.11% | $1.5M | — |
| 31 | SummitTX Capital, L.P. | 146,351 | 0.11% | $1.5M | -4,761 (-3.2%) |
| 32 | GEODE CAPITAL MANAGEMENT, LLC | 141,400 | 0.11% | $1.4M | +7,123 (+5.3%) |
| 33 | JPMORGAN CHASE & CO | 137,074 | 0.10% | $1.3M | -3,391 (-2.4%) |
| 34 | ALPS ADVISORS INC | 135,599 | 0.10% | $1.4M | +26,461 (+24.2%) |
| 35 | MYDA Advisors LLC | 120,000 | 0.09% | $1.2M | — |
| 36 | DAFNA Capital Management LLC | 116,960 | 0.09% | $1.2M | -108,900 (-48.2%) |
| 37 | Jump Financial, LLC | 106,046 | 0.08% | $1.1M | +57,707 (+119.4%) |
| 38 | MILLENNIUM MANAGEMENT LLC | 104,710 | 0.08% | $1.1M | -111,011 (-51.5%) |
| 39 | JANE STREET GROUP, LLC | 104,548 | 0.08% | $1.1M | +85,605 (+451.9%) |
| 40 | SG Americas Securities, LLC | 87,277 | 0.07% | $884K | -12,164 (-12.2%) |
| 41 | CITIGROUP INC | 66,933 | 0.05% | $678K | +6,019 (+9.9%) |
| 42 | TUDOR INVESTMENT CORP ET AL | 66,434 | 0.05% | $673K | -614 (-0.9%) |
| 43 | D. E. Shaw & Co., Inc. | 59,161 | 0.04% | $599K | NEW |
| 44 | MACQUARIE GROUP LTD | 53,500 | 0.04% | $542K | NEW |
| 45 | Engineers Gate Manager LP | 50,886 | 0.04% | $515K | +10,638 (+26.4%) |
| 46 | Vanguard Personalized Indexing Management, LLC | 49,365 | 0.04% | $500K | +4,475 (+10.0%) |
| 47 | Ikarian Capital, LLC | 48,569 | 0.04% | $492K | — |
| 48 | BARCLAYS PLC | 46,265 | 0.03% | $469K | -18,389 (-28.4%) |
| 49 | BANK OF AMERICA CORP /DE/ | 43,657 | 0.03% | $442K | +18,263 (+71.9%) |
| 50 | BNP PARIBAS FINANCIAL MARKETS | 43,297 | 0.03% | $439K | -60,726 (-58.4%) |
| 51 | Prime Capital Investment Advisors, LLC | 40,000 | 0.03% | $405K | +10,000 (+33.3%) |
| 52 | NORTHERN TRUST CORP | 36,128 | 0.03% | $366K | -314 (-0.9%) |
| 53 | UBS Group AG | 35,433 | 0.03% | $359K | -225,574 (-86.4%) |
| 54 | ExodusPoint Capital Management, LP | 34,937 | 0.03% | $354K | -15,228 (-30.4%) |
| 55 | Virtus Investment Advisers, LLC | 34,882 | 0.03% | $353K | +7,723 (+28.4%) |
| 56 | BlackRock, Inc. | 33,914 | 0.03% | $344K | +7,314 (+27.5%) |
| 57 | HRT FINANCIAL LP | 31,724 | 0.02% | $321K | NEW |
| 58 | Ishara Investments LP | 30,750 | 0.02% | $311K | -123,000 (-80.0%) |
| 59 | XTX Topco Ltd | 30,020 | 0.02% | $304K | +15,727 (+110.0%) |
| 60 | MERCER GLOBAL ADVISORS INC /ADV | 29,987 | 0.02% | $304K | — |
| 61 | BRANDYWINE MANAGERS, LLC | 25,227 | 0.02% | $256K | NEW |
| 62 | FOX RUN MANAGEMENT, L.L.C. | 23,694 | 0.02% | $240K | +6,737 (+39.7%) |
| 63 | Lynx1 Capital Management LP | 23,236 | 0.02% | $235K | -193,737 (-89.3%) |
| 64 | J. Goldman & Co LP | 22,788 | 0.02% | $231K | — |
| 65 | Graham Capital Management, L.P. | 22,725 | 0.02% | $230K | -2,444 (-9.7%) |
| 66 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 21,977 | 0.02% | $223K | -33,323 (-60.3%) |
| 67 | GUGGENHEIM CAPITAL LLC | 16,434 | 0.01% | $166K | -149 (-0.9%) |
| 68 | Mitsubishi UFJ Asset Management Co., Ltd. | 15,299 | 0.01% | $155K | -1,247 (-7.5%) |
| 69 | Quadrature Capital Ltd | 14,726 | 0.01% | $149K | NEW |
| 70 | Aquatic Capital Management LLC | 14,097 | 0.01% | $143K | -7,076 (-33.4%) |
| 71 | Mariner, LLC | 13,100 | 0.01% | $133K | -353 (-2.6%) |
| 72 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 11,469 | 0.01% | $116K | NEW |
| 73 | State of Wyoming | 10,791 | 0.01% | $109K | NEW |
| 74 | Verdad Advisers, LP | 10,483 | 0.01% | $106K | NEW |
| 75 | OSAIC HOLDINGS, INC. | 5,255 | 0.00% | $53K | +80 (+1.5%) |
| 76 | Quarry LP | 3,926 | 0.00% | $40K | -14,824 (-79.1%) |
| 77 | FMR LLC | 2,232 | 0.00% | $23K | — |
| 78 | ROYAL BANK OF CANADA | 1,110 | 0.00% | $11K | NEW |
| 79 | Farther Finance Advisors, LLC | 335 | 0.00% | $3K | — |
| 80 | Tower Research Capital LLC (TRC) | 258 | 0.00% | $3K | -608 (-70.2%) |
| 81 | SBI Securities Co., Ltd. | 25 | 0.00% | $253 | — |
| 82 | HUNTINGTON NATIONAL BANK | 1 | 0.00% | $10 | — |
Exited since 2026-03-31 (13 filers; largest 13 shown)
Large holders from 13D/13G (latest per reporting person, last 2 years)
Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.
| Reporting person | Form | Filed | Event | Shares | % of class |
|---|---|---|---|---|---|
| Perceptive Life Sciences Master Fund, Ltd. | SCHEDULE 13D/A | 2026-08-27 | 2026-08-26 | 11,418,016 | 7.6% |
| Perceptive Advisors LLC | SCHEDULE 13D/A | 2026-08-27 | 2026-08-26 | 11,418,016 | 7.6% |
| Joseph Edelman | SCHEDULE 13D/A | 2026-08-27 | 2026-08-26 | 11,418,016 | 7.6% |
| Julian C. Baker | SCHEDULE 13G/A | 2026-08-14 | 2026-06-30 | 9,508,565 | 7% |
| Baker Bros. Advisors (GP) LLC | SCHEDULE 13G/A | 2026-08-14 | 2026-06-30 | 9,508,565 | 7% |
| Baker Bros. Advisors LP | SCHEDULE 13G/A | 2026-08-14 | 2026-06-30 | 9,508,565 | 7% |
| Felix J. Baker | SCHEDULE 13G/A | 2026-08-14 | 2026-06-30 | 9,508,565 | 7% |
| Roderick Wong | SCHEDULE 13G/A | 2026-05-15 | 2026-03-31 | 12,869,340 | 9.6% |
| Ryan Wilder | SCHEDULE 13G/A | 2026-05-15 | 2026-03-31 | 6,175,000 | 4.6% |
| Vestal Point Capital, LP | SCHEDULE 13G/A | 2026-05-15 | 2026-03-31 | 6,175,000 | 4.6% |
| T. Rowe Price Investment Management, Inc. | SCHEDULE 13G/A | 2026-05-15 | 2026-03-31 | 21,652,162 | 16.1% |
| The Toronto-Dominion Bank | SCHEDULE 13G | 2026-05-15 | 2026-03-31 | 7,436,342 | 5.5% |
| RTW Investments, LP | SCHEDULE 13G/A | 2026-05-15 | 2026-03-31 | 12,869,340 | 9.6% |
| SUVRETTA CAPITAL MANAGEMENT, LLC | SCHEDULE 13G/A | 2026-02-13 | 2025-12-31 | 11,190,129 | 8.3% |
| AARON COWEN | SCHEDULE 13G/A | 2026-02-13 | 2025-12-31 | 11,190,129 | 8.3% |
| AVERILL MASTER FUND, LTD | SCHEDULE 13G/A | 2026-02-13 | 2025-12-31 | 9,545,798 | 7.1% |
| Averill Master Fund, Ltd. | SCHEDULE 13G/A | 2025-08-13 | 2025-06-30 | 10,623,778 | 8.7% |
| Wellington Group Holdings LLP | SCHEDULE 13G/A | 2025-08-12 | 2025-06-30 | 5,318,624 | 4.4% |
| Wellington Investment Advisors Holdings LLP | SCHEDULE 13G/A | 2025-08-12 | 2025-06-30 | 5,318,624 | 4.4% |
| Wellington Management Group LLP | SCHEDULE 13G/A | 2025-08-12 | 2025-06-30 | 5,318,624 | 4.4% |
| Wellington Management Company LLP | SCHEDULE 13G/A | 2025-05-12 | 2025-03-31 | 8,583,568 | 6.7% |
| Roderick Wong, M.D. | SCHEDULE 13G/A | 2025-02-14 | 2024-12-31 | 6,540,540 | 5.5% |
Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.