Who owns Aclaris Therapeutics (ACRS)
Which tracked institutional funds hold ACRS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACRS company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on ACRS is one-sided between 2026-Q1 and 2026-Q2: 60 added or opened and 13 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ACRS’s largest tracked holder by dollar value, RA CAPITAL MANAGEMENT, L.P., sizes it at 0.6% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ACRS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 143 tracked filers holding ACRS, 92 increased or opened the position and 52 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ACRS between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- SILVERARC CAPITAL MANAGEMENT, LLC$10M
- Jones Hill Capital LP$9M
- ORBIMED ADVISORS LLC$2M
- Tetragon Partners GP Ltd$2M
- Atom Investors LP$787K
- Verition Fund Management LLC$518K
Full exits 7
- ACADIAN ASSET MANAGEMENT LLC$6M
- MARSHALL WACE, LLP$3M
- Monashee Investment Management LLC$2M
- Bollard Group LLC$2M
- HighTower Advisors, LLC$1M
- MACKENZIE FINANCIAL CORP$800K
Largest adds
- RA CAPITAL MANAGEMENT, L.P.$42M
- BlackRock, Inc.$25M
- Deep Track Capital, LP$14M
- VANGUARD CAPITAL MANAGEMENT LLC$11M
- Vivo Capital, LLC$10M
- BML Capital Management, LLC$10M
Largest trims
- MORGAN STANLEY$10M
- BALYASNY ASSET MANAGEMENT L.P.$2M
- D. E. Shaw & Co., Inc.$1M
- BRIDGEWAY CAPITAL MANAGEMENT, LLC$841K
- Logos Global Management LP$817K
- TWO SIGMA INVESTMENTS, LP$780K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. added | 12,723,026 | $67M | 10.2% | 2026-Q2 |
| BML Capital Management, LLC trimmed | 11,975,000 | $63M | 9.6% | 2026-Q2 |
| BlackRock, Inc. added | 10,037,008 | $53M | 8.1% | 2026-Q2 |
| Deep Track Capital, LP | 9,345,000 | $49M | 7.5% | 2026-Q2 |
| Vivo Capital, LLC added | 6,694,637 | $35M | 5.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 5,817,866 | $31M | 4.7% | 2026-Q2 |
| Frazier Life Sciences Management, L.P. | 4,925,374 | $26M | 4.0% | 2026-Q2 |
| Rock Springs Capital Management LP trimmed | 4,330,532 | $23M | 3.5% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 4,071,000 | $22M | 3.3% | 2026-Q2 |
| Decheng Capital LLC | 4,041,736 | $21M | 3.2% | 2026-Q2 |
| STATE STREET CORP added | 3,255,340 | $17M | 2.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,190,058 | $17M | 2.6% | 2026-Q2 |
| BRAIDWELL LP added | 2,142,348 | $11M | 1.7% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 2,023,470 | $11M | 1.6% | 2026-Q2 |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 1,946,482 | $10M | 1.6% | 2026-Q2 |
| Kalehua Capital Management LLC added | 1,832,365 | $10M | 1.5% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 1,762,081 | $9M | 1.4% | 2026-Q2 |
| Jones Hill Capital LP new | 1,759,492 | $9M | 1.4% | 2026-Q2 |
| Palo Alto Investors LP | 1,613,430 | $9M | 1.3% | 2026-Q2 |
| Woodline Partners LP added | 1,611,054 | $9M | 1.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 1,465,735 | $8M | 1.2% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 1,356,152 | $7M | 1.1% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 1,209,886 | $6M | 1.0% | 2026-Q2 |
| MPM BIOIMPACT LLC added | 1,042,467 | $6M | 0.8% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 1,040,955 | $6M | 0.8% | 2026-Q2 |
| NORTHERN TRUST CORP added | 998,763 | $5M | 0.8% | 2026-Q2 |
| Aldebaran Capital, LLC trimmed | 936,731 | $5M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 907,173 | $5M | 0.7% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 817,531 | $4M | 0.7% | 2026-Q2 |
| Three Bridge Wealth Advisors, LLC | 714,823 | $4M | 0.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 609,158 | $3M | 0.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 523,895 | $3M | 0.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 513,840 | $3M | 0.4% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 468,964 | $2M | 0.4% | 2026-Q2 |
| Aisling Capital Management LP | 434,455 | $2M | 0.3% | 2026-Q2 |
| ORBIMED ADVISORS LLC new | 421,500 | $2M | 0.3% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 414,499 | $2M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 412,549 | $2M | 0.3% | 2026-Q2 |
| Tetragon Partners GP Ltd new | 400,000 | $2M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 365,055 | $2M | 0.3% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 346,058 | $2M | 0.3% | 2026-Q2 |
| FMR LLC added | 313,850 | $2M | 0.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 282,599 | $1M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 278,404 | $1M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 275,611 | $1M | 0.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 267,498 | $1M | 0.2% | 2026-Q2 |
| SUPERSTRING CAPITAL MANAGEMENT LP trimmed | 257,675 | $1M | 0.2% | 2026-Q2 |
| UBS Group AG added | 257,001 | $1M | 0.2% | 2026-Q2 |
| Invesco Ltd. added | 243,028 | $1M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 221,599 | $1M | 0.2% | 2026-Q2 |
| Creative Planning added | 206,647 | $1M | 0.2% | 2026-Q2 |
| Logos Global Management LP trimmed | 200,000 | $1M | 0.2% | 2026-Q2 |
| Verdad Advisers, LP trimmed | 175,272 | $927K | 0.1% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 171,327 | $906K | 0.1% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 154,554 | $818K | 0.1% | 2026-Q2 |
| Atom Investors LP new | 148,855 | $787K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 143,216 | $758K | 0.1% | 2026-Q2 |
| ALPS ADVISORS INC added | 141,749 | $750K | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 138,778 | $734K | 0.1% | 2026-Q2 |
| MORGAN STANLEY trimmed | 134,117 | $709K | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 133,068 | $704K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 129,056 | $683K | 0.1% | 2026-Q2 |
| Hudson Bay Capital Management LP added | 120,000 | $635K | 0.1% | 2026-Q2 |
| CenterBook Partners LP added | 118,228 | $625K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 117,786 | $623K | 0.1% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 110,412 | $584K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 108,648 | $575K | 0.1% | 2026-Q2 |
| Verition Fund Management LLC added | 98,000 | $518K | 0.1% | 2026-Q2 |
| STRS OHIO added | 81,400 | $431K | 0.1% | 2026-Q2 |
| Voleon Capital Management LP new | 77,168 | $408K | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 76,270 | $403K | 0.1% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 75,019 | $397K | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 73,010 | $386K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 69,699 | $369K | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 60,259 | $319K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 54,578 | $289K | 0.0% | 2026-Q2 |
| MANGROVE PARTNERS IM, LLC new | 50,291 | $266K | 0.0% | 2026-Q2 |
| DIVERSIFIED TRUST CO added | 45,523 | $241K | 0.0% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 57,000 | $214K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey added | 38,826 | $205K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 35,524 | $188K | 0.0% | 2026-Q2 |
| VANGUARD GROUP INC trimmed | 6,502,080 | $20M | 3.0% | 2025-Q4 stale (2 quarters behind) |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 1,539,791 | $6M | 0.9% | 2026-Q1 stale (1 quarter behind) |
| KOTLER KEVIN new | 1,705,929 | $5M | 0.8% | 2025-Q4 stale (2 quarters behind) |
| MARSHALL WACE, LLP added | 700,684 | $3M | 0.4% | 2026-Q1 stale (1 quarter behind) |
| Monashee Investment Management LLC trimmed | 500,000 | $2M | 0.3% | 2026-Q1 stale (1 quarter behind) |
| Bollard Group LLC trimmed | 431,631 | $2M | 0.2% | 2026-Q1 stale (1 quarter behind) |
| HighTower Advisors, LLC trimmed | 305,836 | $1M | 0.2% | 2026-Q1 stale (1 quarter behind) |
| AMERIPRISE FINANCIAL INC trimmed | 318,426 | $958K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| MACKENZIE FINANCIAL CORP new | 213,405 | $800K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| TWO SIGMA ADVISERS, LP trimmed | 255,400 | $769K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Qube Research & Technologies Ltd trimmed | 194,510 | $729K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| CANTOR FITZGERALD, L. P. trimmed | 451,120 | $641K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| Squarepoint Ops LLC added | 390,583 | $555K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| ADAR1 Capital Management, LLC trimmed | 132,426 | $497K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| AMERICAN CENTURY COMPANIES INC added | 118,702 | $445K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| XTX Topco Ltd trimmed | 97,774 | $367K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Stonepine Capital Management, LLC trimmed | 192,900 | $367K | 0.1% | 2025-Q3 stale (3 quarters behind) |
| Seven Fleet Capital Management LP new | 107,419 | $323K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Point72 Asset Management, L.P. new | 87,175 | $262K | 0.0% | 2025-Q4 stale (2 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.