ERAS · Erasca, 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 257 13F filersWho Holds ERAS
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: 256 filers, like-for-like change +2.5%; actively managed books +0.9%; index-like books +8.3%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 59.7% | 130 | -2.3% |
| Exempt adviser | 3.0% | 7 | +6.0% |
| Adviser | 8.8% | 9 | +6.9% |
| Bank | 7.6% | 15 | +21.2% |
| Insurer | 0.0% | 2 | -88.4% |
| Broker-dealer | 0.0% | 1 | +75.5% |
| Benefit plan | 0.2% | 5 | +13.2% |
| Non-US | 0.9% | 6 | +63.9% |
| Holding company | 10.4% | 6 | +3.7% |
| Unknown | 9.4% | 75 | +14.6% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 22.8% | 33 | +8.3% |
| Systematic-like | 3.0% | 22 | -32.9% |
| Concentrated | 23.3% | 30 | -7.3% |
| Diversified active | 50.9% | 171 | +8.5% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 46.9% | 116 | +9.8% |
| Medium turnover | 35.5% | 66 | -6.5% |
| High turnover | 11.3% | 49 | +15.3% |
| Unknown | 6.3% | 25 | -11.0% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 9.2% | 45 | +5.3% |
| Medium horizon | 41.0% | 45 | -0.1% |
| Long horizon | 42.4% | 142 | +18.2% |
| Unknown | 7.4% | 24 | -37.8% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 2.6% | 51 | -22.3% |
| $1B to $10B | 40.0% | 63 | -3.5% |
| $10B to $100B | 12.1% | 75 | -6.8% |
| $100B or more | 45.3% | 67 | +13.8% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.6% | 41 | +119.5% |
| Pooled investment vehicles | 42.8% | 47 | -12.2% |
| Registered funds and BDCs | 13.2% | 17 | +35.4% |
| Pension and profit sharing plans | 0.0% | 1 | -19.4% |
| Insurance companies | 0.2% | 3 | +27.7% |
| Governments and sovereign funds | 0.6% | 5 | -1.8% |
| Other investment advisers | 0.0% | 4 | +74.9% |
| Other | 0.0% | 1 | +100.7% |
| Diversified | 2.0% | 9 | +45.7% |
| Unknown | 40.6% | 128 | +10.7% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 20.2% | 50 | -10.9% |
| Private equity funds | 10.9% | 8 | -16.6% |
| Venture capital funds | 7.9% | 4 | -10.1% |
| Real estate funds | 0.0% | 4 | +7.1% |
| Securitized asset funds | 0.1% | 1 | +2.8% |
| Other private funds | 4.2% | 11 | +193.5% |
| Mixed private funds | 10.5% | 5 | +7.0% |
| Private funds, type not stated | 0.0% | 4 | +225.1% |
| No private funds | 8.8% | 49 | +8.8% |
| Unknown | 37.4% | 120 | +11.1% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 96.4% | 206 | +0.7% |
| Outside the US | 3.6% | 50 | +94.9% |
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 2 holders 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.
Conviction and Crowding
256 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 $12,300,148 (0 buying, 2 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 86.3% 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 ERAS's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | DNTH Dianthus Therapeutics, Inc. /DE/ | 20 |
| 2 | ELVN Enliven Therapeutics, Inc. | 19 |
| 3 | TNGX Tango Therapeutics, Inc. | 18 |
| 4 | SYRE Spyre Therapeutics, Inc. | 18 |
| 5 | PRAX Praxis Precision Medicines, Inc. | 17 |
| 6 | SVRA Savara Inc | 13 |
| 7 | AVTX Avalo Therapeutics, Inc. | 14 |
| 8 | MBX MBX Biosciences, Inc. | 13 |
| 9 | ACHV Achieve Life Sciences, Inc. | 9 |
| 10 | ORKA Oruka Therapeutics, Inc. | 16 |
Shareholder Targets
13F filers that own its peers but not ERAS, quarter ended Jun 30, 2026Found through its holder-overlap peers: DNTH, ELVN, TNGX, SYRE, PRAX, SVRA, AVTX, MBX, ACHV, ORKA, GPCR, RLMD, TARS, COGT, SION, AMLX, MLYS, NERV, DSGN, SABS. 511 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | PERCEPTIVE ADVISORS LLC Registered adviser, Diversified active | $1,522,787,971 9 held | PRAX, SYRE, AMLX |
| 2 | Polar Capital Holdings Plc Registered adviser, Diversified active | $1,090,331,740 11 held | ELVN, COGT, ORKA |
| 3 | TCG Crossover Management, LLC Unknown, Diversified active | $1,083,842,414 8 held | TNGX, COGT, SYRE |
| 4 | Deep Track Capital, LP Adviser, Diversified active | $1,050,944,819 8 held | GPCR, TARS, ORKA |
| 5 | DEERFIELD MANAGEMENT COMPANY, L.P. Registered adviser, Diversified active | $1,035,561,509 8 held | PRAX, COGT, TNGX |
| 6 | ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active | $982,970,241 14 held | PRAX, TNGX, SYRE |
| 7 | Fairmount Funds Management LLC Registered adviser, Concentrated | $907,111,371 4 held | ORKA, DNTH, COGT |
| 8 | Driehaus Capital Management LLC Registered adviser, Diversified active | $884,804,755 10 held | PRAX, SYRE, GPCR |
| 9 | BAKER BROS. ADVISORS LP Registered adviser, Concentrated | $869,781,249 8 held | PRAX, DNTH, GPCR |
| 10 | RA CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated | $826,870,170 5 held | SION, MLYS, ORKA |
Fund Ownership of ERAS by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 11.34% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 2.23% | 7,804,134 |
| Index ETFs | 9.11% | 31,855,174 |
| Active ETFs | 0.59% | 2,051,064 |
| Active funds | 9.70% | 33,925,464 |
| Unclassified | 0.02% | 70,859 |
| All registered funds | 21.65% | 75,706,695 |
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 |
|---|---|---|---|---|---|---|
| Mid Frazier Life Sciences Management, L.P. Registered adviser | $457,545,444 | 8.57% | 24,975,188 | Shares | 2026-08-14 | |
| Mega T. Rowe Price Investment Management, Inc. Adviser | $388,124,570 | 7.27% | 21,185,839 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. Holding company | $387,543,949 | 7.26% | 21,154,146 | Shares | 2026-08-07 | |
| Large RTW INVESTMENTS, LP Registered adviser | $328,784,533 | 6.16% | 17,946,754 | Shares | 2026-08-14 | |
| Mid Venrock Adviser, LLC Registered adviser | $327,777,995 | 6.14% | 17,891,812 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $223,221,047 | 4.18% | 12,184,555 | Shares | 2026-09-22 | |
| Mid Logos Global Management LP Registered adviser | $222,588,000 | 4.17% | 12,150,000 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $208,888,285 | 3.91% | 11,402,199 | Shares | 2026-08-13 | |
| Mid Siren, L.L.C. | $208,807,347 | 3.91% | 11,397,781 | Shares | 2026-08-13 | |
| Mid Paradigm Biocapital Advisors LP Registered adviser | $174,956,000 | 3.28% | 9,550,000 | Shares | 2026-08-14 | |
| Mid ARCH Venture Management, LLC Exempt adviser | $129,917,324 | 2.43% | 7,091,557 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $119,106,123 | 2.23% | 6,501,426 | Shares | 2026-08-12 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $114,912,346 | 2.15% | 6,272,508 | Shares | 2026-08-14 | |
| Mid Cormorant Asset Management, LP Registered adviser | $109,920,000 | 2.06% | 6,000,000 | Shares | 2026-08-14 | |
| Mid Affinity Asset Advisors, LLC Registered adviser | $96,180,000 | 1.80% | 5,250,000 | Shares | 2026-08-13 | |
| Mid Vivo Capital, LLC Registered adviser | $75,614,187 | 1.42% | 4,127,412 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $75,453,008 | 1.41% | 4,118,614 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $70,021,109 | 1.31% | 3,822,113 | Shares | 2026-08-14 | |
| Large Caption Management, LLC Registered adviser | $68,535,120 | 1.28% | 3,741,000 | Call | 2026-08-14 | |
| Large Assenagon Asset Management S.A. | $60,521,347 | 1.13% | 4,128,332 | Shares | 2026-10-15 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $55,852,860 | 1.05% | 3,048,737 | Shares | 2026-08-14 | |
| Mega FMR LLC Holding company | $52,824,198 | 0.99% | 2,883,417 | Shares | 2026-08-13 | |
| Large a16z Capital Management, L.L.C. Registered adviser | $52,441,000 | 0.98% | 2,862,500 | Shares | 2026-08-14 | |
| Large Woodline Partners LP Registered adviser | $51,879,803 | 0.97% | 2,831,867 | Shares | 2026-08-14 | |
| Mega JENNISON ASSOCIATES LLC Registered adviser | $51,083,707 | 0.96% | 2,788,412 | Shares | 2026-08-03 | |
| Mid Soleus Capital Management, L.P. | $49,464,000 | 0.93% | 2,700,000 | Shares | 2026-08-11 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $43,782,308 | 0.82% | 2,389,864 | Shares | 2026-08-13 | |
| Mid SAMLYN CAPITAL, LLC Registered adviser | $41,347,982 | 0.77% | 2,256,986 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $37,410,062 | 0.70% | 2,042,034 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $35,872,755 | 0.67% | 1,958,120 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $35,628,552 | 0.67% | 1,944,790 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $35,475,983 | 0.66% | 1,936,462 | Shares | 2026-08-07 | |
| Mega Nuveen, LLC | $33,740,584 | 0.63% | 1,841,735 | Shares | 2026-08-11 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $32,316,111 | 0.61% | 1,763,980 | Shares | 2026-08-11 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $31,107,195 | 0.58% | 1,697,991 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $29,250,847 | 0.55% | 1,596,662 | Shares | 2026-08-13 | |
| Small STEMPOINT CAPITAL LP Registered adviser | $28,687,526 | 0.54% | 1,565,913 | Shares | 2026-08-14 | |
| Mid Rock Springs Capital Management LP Registered adviser | $25,687,388 | 0.48% | 1,402,150 | Shares | 2026-08-14 | |
| Mid Evergreen Quality Fund GP, Ltd. | $25,195,496 | 0.47% | 1,375,300 | Shares | 2026-08-14 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $25,078,577 | 0.47% | 1,368,918 | Shares | 2026-08-13 | |
| Large FRED ALGER MANAGEMENT, LLC Registered adviser | $23,970,895 | 0.45% | 1,308,455 | Shares | 2026-08-14 | |
| Small SILVERARC CAPITAL MANAGEMENT, LLC Registered adviser | $23,138,636 | 0.43% | 1,263,026 | Shares | 2026-08-13 | |
| Large Point72 Asset Management, L.P. Registered adviser | $22,848,758 | 0.43% | 1,247,203 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $22,780,920 | 0.43% | 1,243,500 | Call | 2026-08-14 | |
| Small First Turn Management, LLC Registered adviser | $22,381,928 | 0.42% | 1,221,721 | Shares | 2026-08-14 | |
| Large FEDERATED HERMES, INC. Adviser | $19,827,039 | 0.37% | 1,082,262 | Shares | 2026-08-12 | |
| Large Caption Management, LLC Registered adviser | $19,075,242 | 0.36% | 1,041,225 | Shares | 2026-08-14 | |
| Mid Integral Health Asset Management, LLC Registered adviser | $18,320,000 | 0.34% | 1,000,000 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $17,396,488 | 0.33% | 949,590 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $16,667,792 | 0.31% | 909,814 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $15,838,132 | 0.30% | 864,527 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $13,868,074 | 0.26% | 756,991 | Shares | 2026-08-13 | |
| Large Caption Management, LLC Registered adviser | $13,245,360 | 0.25% | 723,000 | Put | 2026-08-14 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP Registered adviser | $13,185,361 | 0.25% | 719,725 | Shares | 2026-08-13 | |
| Mega CITIGROUP INC Bank | $13,071,942 | 0.24% | 713,534 | Shares | 2026-08-03 | |
| Mega Capital World Investors Adviser | $12,908,308 | 0.24% | 704,602 | Shares | 2026-08-12 | |
| Mega JANE STREET GROUP, LLC | $12,752,552 | 0.24% | 696,100 | Call | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $12,484,729 | 0.23% | 681,481 | Shares | 2026-08-14 | |
| Mega TD Asset Management Inc | $12,112,304 | 0.23% | 661,152 | Shares | 2026-08-04 | |
| Large Balyasny Asset Management L.P. Registered adviser | $12,057,766 | 0.23% | 658,175 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $12,005,057 | 0.22% | 655,298 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $11,433,639 | 0.21% | 624,107 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $11,284,676 | 0.21% | 615,976 | Shares | 2026-08-13 | |
| Large Balyasny Asset Management L.P. Registered adviser | $10,992,000 | 0.21% | 600,000 | Call | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $10,405,261 | 0.19% | 567,973 | Shares | 2026-08-06 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $10,038,169 | 0.19% | 547,935 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9,649,144 | 0.18% | 526,700 | Put | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $9,171,064 | 0.17% | 500,604 | Shares | 2026-08-12 | |
| Mid ORBIMED ADVISORS LLC Registered adviser | $9,084,888 | 0.17% | 495,900 | Shares | 2026-08-14 | |
| Mid Polymer Capital Management (HK) LTD Exempt adviser | $8,757,326 | 0.16% | 478,020 | Shares | 2026-08-13 | |
| Small KVP Capital Advisors, LP Registered adviser | $8,335,600 | 0.16% | 455,000 | Shares | 2026-08-13 | |
| Small Spruce Street Capital LP Registered adviser | $7,740,987 | 0.15% | 422,543 | Shares | 2026-08-13 | |
| Mega Creative Planning Registered adviser | $7,435,702 | 0.14% | 405,879 | Shares | 2026-08-13 | |
| Mega Pictet Asset Management Holding SA | $7,205,036 | 0.13% | 393,288 | Shares | 2026-07-30 | |
| Mid Cinctive Capital Management LP Registered adviser | $7,174,881 | 0.13% | 391,642 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $6,961,600 | 0.13% | 380,000 | Call | 2026-09-02 | |
| Mid Rhenman & Partners Asset Management AB | $6,393,680 | 0.12% | 349,000 | Shares | 2026-08-13 | |
| Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE | $6,369,057 | 0.12% | 347,656 | Shares | 2026-09-09 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $6,244,316 | 0.12% | 340,847 | Shares | 2026-08-12 | |
| Mid EcoR1 Capital, LLC Registered adviser | $6,045,600 | 0.11% | 330,000 | Shares | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $5,741,431 | 0.11% | 313,397 | Shares | 2026-08-14 | |
| Mega Swiss National Bank | $5,714,008 | 0.11% | 311,900 | Shares | 2026-08-11 | |
| Small Seven Fleet Capital Management LP Registered adviser | $5,642,687 | 0.11% | 308,007 | Shares | 2026-08-17 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $5,322,381 | 0.10% | 290,523 | Shares | 2026-08-14 | |
| Mid Longaeva Partners L.P. | $5,245,419 | 0.10% | 286,322 | Shares | 2026-08-14 | |
| Mid SIMPLEX TRADING, LLC | $5,074,420 | 0.10% | 276,988 | Shares | 2026-08-12 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $4,875,683 | 0.09% | 266,140 | Shares | 2026-08-13 | |
| Mid E Fund Management Co., Ltd. | $4,861,779 | 0.09% | 265,381 | Shares | 2026-08-11 | |
| Small ACUTA CAPITAL PARTNERS, LLC Adviser | $4,858,445 | 0.09% | 265,199 | Shares | 2026-08-14 | |
| Small Parkman Healthcare Partners LLC Registered adviser | $4,739,090 | 0.09% | 258,684 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $4,696,643 | 0.09% | 256,367 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $4,354,664 | 0.08% | 237,700 | Put | 2026-09-02 | |
| Mega DEUTSCHE BANK AG\ Non-US | $4,072,645 | 0.08% | 222,306 | Shares | 2026-08-07 | |
| Mid Tema ETFs LLC Registered adviser | $3,947,087 | 0.07% | 269,242 | Shares | 2026-10-16 | |
| Mid ArrowMark Colorado Holdings LLC Registered adviser | $3,864,182 | 0.07% | 210,927 | Shares | 2026-08-13 | |
| Large Rafferty Asset Management, LLC Registered adviser | $3,782,402 | 0.07% | 206,463 | Shares | 2026-08-14 | |
| Large Man Group plc | $3,710,770 | 0.07% | 202,553 | Shares | 2026-08-14 | |
| Large Tidal Investments LLC Registered adviser | $3,342,264 | 0.06% | 182,438 | Shares | 2026-08-13 | |
| Small Moody Aldrich Partners LLC Registered adviser | $3,259,842 | 0.06% | 177,939 | Shares | 2026-07-15 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $3,229,321 | 0.06% | 176,273 | Shares | 2026-08-24 |
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