Who owns DYN (DYN)
Which tracked institutional funds hold DYN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See DYN company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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
43 tracked funds added or opened DYN while 87 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
DYN’s largest tracked holder by dollar value, T. Rowe Price Investment Management, Inc., sizes it at 0.4% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in DYN 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 2025-Q4 and 2026-Q1, across 228 tracked filers holding DYN, 144 increased or opened the position and 105 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 DYN between the 2025-Q4 and 2026-Q1 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 14
- VANGUARD CAPITAL MANAGEMENT LLC$116M
- VANGUARD PORTFOLIO MANAGEMENT LLC$75M
- Fiera Capital Corp$25M
- VANGUARD FIDUCIARY TRUST CO$17M
- Man Group plc$2M
- MOORE CAPITAL MANAGEMENT, LP$1M
Full exits 27
- VANGUARD GROUP INC$198M
- Candriam S.C.A.$21M
- EVENTIDE ASSET MANAGEMENT, LLC$13M
- FEDERATED HERMES, INC.$9M
- Balyasny Asset Management L.P.$8M
- SCHRODER INVESTMENT MANAGEMENT GROUP$7M
Largest adds
- T. Rowe Price Investment Management, Inc.$502M
- Vestal Point Capital, LP$70M
- FMR LLC$33M
- Orbis Allan Gray Ltd$29M
- PERCEPTIVE ADVISORS LLC$17M
- DIMENSIONAL FUND ADVISORS LP$15M
Largest trims
- ADAGE CAPITAL PARTNERS GP, L.L.C.$83M
- Siren, L.L.C.$28M
- JANUS HENDERSON GROUP PLC$24M
- Vivo Capital, LLC$23M
- FCPM III SERVICES B.V.$23M
- CITADEL ADVISORS LLC$19M
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 |
|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. added | 30,785,801 | $558M | 14.6% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC trimmed | 13,647,376 | $247M | 6.5% | 2026-Q1 |
| BlackRock, Inc. added | 11,699,870 | $212M | 5.6% | 2026-Q1 |
| Atlas Venture Life Science Advisors, LLC | 9,130,465 | $166M | 4.3% | 2026-Q1 |
| FMR LLC added | 8,907,808 | $161M | 4.2% | 2026-Q1 |
| Orbis Allan Gray Ltd added | 6,762,231 | $123M | 3.2% | 2026-Q1 |
| STATE STREET CORP trimmed | 6,653,746 | $121M | 3.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 6,405,069 | $116M | 3.0% | 2026-Q1 |
| PERCEPTIVE ADVISORS LLC added | 4,668,839 | $85M | 2.2% | 2026-Q1 |
| FCPM III SERVICES B.V. trimmed | 4,644,386 | $84M | 2.2% | 2026-Q1 |
| TCG Crossover Management, LLC | 4,615,144 | $84M | 2.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 4,162,041 | $75M | 2.0% | 2026-Q1 |
| Vestal Point Capital, LP added | 4,000,000 | $73M | 1.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,504,114 | $64M | 1.7% | 2026-Q1 |
| ARMISTICE CAPITAL, LLC trimmed | 3,175,110 | $58M | 1.5% | 2026-Q1 |
| Frazier Life Sciences Management, L.P. | 3,153,082 | $57M | 1.5% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 3,253,473 | $56M | 1.5% | 2026-Q1 |
| ORBIMED ADVISORS LLC added | 2,917,884 | $53M | 1.4% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,328,373 | $42M | 1.1% | 2026-Q1 |
| Siren, L.L.C. trimmed | 2,229,125 | $40M | 1.1% | 2026-Q1 |
| Venrock Adviser, LLC | 2,173,913 | $39M | 1.0% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 2,009,082 | $36M | 1.0% | 2026-Q1 |
| Deep Track Capital, LP trimmed | 2,000,000 | $36M | 1.0% | 2026-Q1 |
| SAMLYN CAPITAL, LLC added | 1,922,543 | $35M | 0.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 1,723,116 | $31M | 0.8% | 2026-Q1 |
| BRAIDWELL LP added | 1,681,998 | $30M | 0.8% | 2026-Q1 |
| Palo Alto Investors LP added | 1,652,972 | $30M | 0.8% | 2026-Q1 |
| Sofinnova Investments, Inc. trimmed | 1,633,897 | $30M | 0.8% | 2026-Q1 |
| Vivo Capital, LLC trimmed | 1,557,466 | $28M | 0.7% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,443,313 | $26M | 0.7% | 2026-Q1 |
| Aberdeen Group plc added | 1,430,384 | $26M | 0.7% | 2026-Q1 |
| MPM BIOIMPACT LLC added | 1,408,152 | $26M | 0.7% | 2026-Q1 |
| Logos Global Management LP added | 1,400,000 | $25M | 0.7% | 2026-Q1 |
| Fiera Capital Corp new | 1,380,620 | $25M | 0.7% | 2026-Q1 |
| Polar Capital Holdings Plc added | 1,359,169 | $25M | 0.6% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,198,838 | $22M | 0.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,158,390 | $21M | 0.6% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 1,000,000 | $18M | 0.5% | 2026-Q1 |
| Rock Springs Capital Management LP added | 972,198 | $18M | 0.5% | 2026-Q1 |
| Saturn V Capital Management LP trimmed | 966,609 | $18M | 0.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 951,589 | $17M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 947,438 | $17M | 0.5% | 2026-Q1 |
| MORGAN STANLEY trimmed | 929,003 | $17M | 0.4% | 2026-Q1 |
| Squarepoint Ops LLC added | 834,176 | $15M | 0.4% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC trimmed | 821,849 | $15M | 0.4% | 2026-Q1 |
| BAKER BROS. ADVISORS LP | 813,449 | $15M | 0.4% | 2026-Q1 |
| Nuveen, LLC added | 718,333 | $13M | 0.3% | 2026-Q1 |
| ArrowMark Colorado Holdings LLC trimmed | 673,949 | $12M | 0.3% | 2026-Q1 |
| Artisan Partners Limited Partnership trimmed | 619,457 | $11M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 533,600 | $10M | 0.3% | 2026-Q1 |
| TD Asset Management Inc added | 529,312 | $10M | 0.3% | 2026-Q1 |
| STEMPOINT CAPITAL LP trimmed | 506,075 | $9M | 0.2% | 2026-Q1 |
| Ensign Peak Advisors, Inc | 496,590 | $9M | 0.2% | 2026-Q1 |
| University of Wisconsin Foundation added | 484,745 | $9M | 0.2% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 454,463 | $8M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 451,644 | $8M | 0.2% | 2026-Q1 |
| WASATCH ADVISORS LP added | 443,668 | $8M | 0.2% | 2026-Q1 |
| Clearbridge Investments, LLC trimmed | 403,225 | $7M | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp added | 401,616 | $7M | 0.2% | 2026-Q1 |
| UBS Group AG trimmed | 380,561 | $7M | 0.2% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 333,497 | $6M | 0.2% | 2026-Q1 |
| Fisher Asset Management, LLC added | 323,051 | $6M | 0.2% | 2026-Q1 |
| Catalio Capital Management, LP trimmed | 282,954 | $5M | 0.1% | 2026-Q1 |
| Tetragon Partners GP Ltd added | 258,132 | $5M | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 253,153 | $5M | 0.1% | 2026-Q1 |
| Invesco Ltd. added | 248,941 | $5M | 0.1% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 239,285 | $4M | 0.1% | 2026-Q1 |
| Swiss National Bank added | 228,100 | $4M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 221,123 | $4M | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 201,144 | $4M | 0.1% | 2026-Q1 |
| SummitTX Capital, L.P. trimmed | 196,188 | $4M | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 187,223 | $3M | 0.1% | 2026-Q1 |
| PDT Partners, LLC | 182,986 | $3M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 182,977 | $3M | 0.1% | 2026-Q1 |
| HighVista Strategies LLC added | 182,929 | $3M | 0.1% | 2026-Q1 |
| Neo Ivy Capital Management trimmed | 168,753 | $3M | 0.1% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 164,887 | $3M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 10,128,113 | $198M | 5.2% | 2025-Q4 stale |
| RA CAPITAL MANAGEMENT, L.P. | 9,714,392 | $92M | 2.4% | 2025-Q2 stale |
| RTW INVESTMENTS, LP added | 2,890,567 | $37M | 1.0% | 2025-Q3 stale |
| Paradigm Biocapital Advisors LP new | 1,898,950 | $24M | 0.6% | 2025-Q3 stale |
| Candriam S.C.A. added | 1,057,263 | $21M | 0.5% | 2025-Q4 stale |
| EVENTIDE ASSET MANAGEMENT, LLC added | 680,305 | $13M | 0.3% | 2025-Q4 stale |
| Integral Health Asset Management, LLC added | 800,000 | $10M | 0.3% | 2025-Q3 stale |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 729,606 | $9M | 0.2% | 2025-Q3 stale |
| FEDERATED HERMES, INC. trimmed | 464,797 | $9M | 0.2% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 710,044 | $9M | 0.2% | 2025-Q3 stale |
| Nantahala Capital Management, LLC trimmed | 702,884 | $9M | 0.2% | 2025-Q3 stale |
| MPM ASSET MANAGEMENT LLC | 682,376 | $9M | 0.2% | 2025-Q3 stale |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) added | 812,408 | $8M | 0.2% | 2025-Q1 stale |
| Balyasny Asset Management L.P. trimmed | 432,986 | $8M | 0.2% | 2025-Q4 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 386,953 | $7M | 0.2% | 2025-Q4 stale |
| Point72 Asset Management, L.P. trimmed | 329,345 | $6M | 0.2% | 2025-Q4 stale |
| CANADA PENSION PLAN INVESTMENT BOARD | 284,000 | $6M | 0.1% | 2025-Q4 stale |
| Schonfeld Strategic Advisors LLC added | 415,927 | $5M | 0.1% | 2025-Q3 stale |
| AMERICAN CENTURY COMPANIES INC added | 168,304 | $3M | 0.1% | 2025-Q4 stale |
| NEUBERGER BERMAN GROUP LLC trimmed | 165,482 | $3M | 0.1% | 2025-Q4 stale |
| Jain Global LLC trimmed | 162,047 | $3M | 0.1% | 2025-Q4 stale |
| First Light Asset Management, LLC trimmed | 155,231 | $3M | 0.1% | 2025-Q4 stale |
| Lisanti Capital Growth, LLC added | 154,445 | $3M | 0.1% | 2025-Q4 stale |
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.