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Institutional Ownership · SEC Form 13F

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.

228
Institutional holders
187,953,941
Shares held (tracked funds)

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).

FundSharesReported value% of valueQuarter
T. Rowe Price Investment Management, Inc. added30,785,801$558M14.6%2026-Q1
JANUS HENDERSON GROUP PLC trimmed13,647,376$247M6.5%2026-Q1
BlackRock, Inc. added11,699,870$212M5.6%2026-Q1
Atlas Venture Life Science Advisors, LLC9,130,465$166M4.3%2026-Q1
FMR LLC added8,907,808$161M4.2%2026-Q1
Orbis Allan Gray Ltd added6,762,231$123M3.2%2026-Q1
STATE STREET CORP trimmed6,653,746$121M3.2%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new6,405,069$116M3.0%2026-Q1
PERCEPTIVE ADVISORS LLC added4,668,839$85M2.2%2026-Q1
FCPM III SERVICES B.V. trimmed4,644,386$84M2.2%2026-Q1
TCG Crossover Management, LLC4,615,144$84M2.2%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new4,162,041$75M2.0%2026-Q1
Vestal Point Capital, LP added4,000,000$73M1.9%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added3,504,114$64M1.7%2026-Q1
ARMISTICE CAPITAL, LLC trimmed3,175,110$58M1.5%2026-Q1
Frazier Life Sciences Management, L.P.3,153,082$57M1.5%2026-Q1
JPMORGAN CHASE & CO trimmed3,253,473$56M1.5%2026-Q1
ORBIMED ADVISORS LLC added2,917,884$53M1.4%2026-Q1
PRICE T ROWE ASSOCIATES INC /MD/ added2,328,373$42M1.1%2026-Q1
Siren, L.L.C. trimmed2,229,125$40M1.1%2026-Q1
Venrock Adviser, LLC2,173,913$39M1.0%2026-Q1
FRANKLIN RESOURCES INC added2,009,082$36M1.0%2026-Q1
Deep Track Capital, LP trimmed2,000,000$36M1.0%2026-Q1
SAMLYN CAPITAL, LLC added1,922,543$35M0.9%2026-Q1
GOLDMAN SACHS GROUP INC trimmed1,723,116$31M0.8%2026-Q1
BRAIDWELL LP added1,681,998$30M0.8%2026-Q1
Palo Alto Investors LP added1,652,972$30M0.8%2026-Q1
Sofinnova Investments, Inc. trimmed1,633,897$30M0.8%2026-Q1
Vivo Capital, LLC trimmed1,557,466$28M0.7%2026-Q1
BANK OF AMERICA CORP /DE/ added1,443,313$26M0.7%2026-Q1
Aberdeen Group plc added1,430,384$26M0.7%2026-Q1
MPM BIOIMPACT LLC added1,408,152$26M0.7%2026-Q1
Logos Global Management LP added1,400,000$25M0.7%2026-Q1
Fiera Capital Corp new1,380,620$25M0.7%2026-Q1
Polar Capital Holdings Plc added1,359,169$25M0.6%2026-Q1
NORTHERN TRUST CORP added1,198,838$22M0.6%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC added1,158,390$21M0.6%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed1,000,000$18M0.5%2026-Q1
Rock Springs Capital Management LP added972,198$18M0.5%2026-Q1
Saturn V Capital Management LP trimmed966,609$18M0.5%2026-Q1
DIMENSIONAL FUND ADVISORS LP added951,589$17M0.5%2026-Q1
VANGUARD FIDUCIARY TRUST CO new947,438$17M0.5%2026-Q1
MORGAN STANLEY trimmed929,003$17M0.4%2026-Q1
Squarepoint Ops LLC added834,176$15M0.4%2026-Q1
FRONTIER CAPITAL MANAGEMENT CO LLC trimmed821,849$15M0.4%2026-Q1
BAKER BROS. ADVISORS LP813,449$15M0.4%2026-Q1
Nuveen, LLC added718,333$13M0.3%2026-Q1
ArrowMark Colorado Holdings LLC trimmed673,949$12M0.3%2026-Q1
Artisan Partners Limited Partnership trimmed619,457$11M0.3%2026-Q1
RENAISSANCE TECHNOLOGIES LLC added533,600$10M0.3%2026-Q1
TD Asset Management Inc added529,312$10M0.3%2026-Q1
STEMPOINT CAPITAL LP trimmed506,075$9M0.2%2026-Q1
Ensign Peak Advisors, Inc496,590$9M0.2%2026-Q1
University of Wisconsin Foundation added484,745$9M0.2%2026-Q1
ALGERT GLOBAL LLC added454,463$8M0.2%2026-Q1
RAYMOND JAMES FINANCIAL INC trimmed451,644$8M0.2%2026-Q1
WASATCH ADVISORS LP added443,668$8M0.2%2026-Q1
Clearbridge Investments, LLC trimmed403,225$7M0.2%2026-Q1
Bank of New York Mellon Corp added401,616$7M0.2%2026-Q1
UBS Group AG trimmed380,561$7M0.2%2026-Q1
NEW YORK STATE COMMON RETIREMENT FUND added333,497$6M0.2%2026-Q1
Fisher Asset Management, LLC added323,051$6M0.2%2026-Q1
Catalio Capital Management, LP trimmed282,954$5M0.1%2026-Q1
Tetragon Partners GP Ltd added258,132$5M0.1%2026-Q1
Qube Research & Technologies Ltd trimmed253,153$5M0.1%2026-Q1
Invesco Ltd. added248,941$5M0.1%2026-Q1
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added239,285$4M0.1%2026-Q1
Swiss National Bank added228,100$4M0.1%2026-Q1
DEUTSCHE BANK AG\ added221,123$4M0.1%2026-Q1
CITADEL ADVISORS LLC trimmed201,144$4M0.1%2026-Q1
SummitTX Capital, L.P. trimmed196,188$4M0.1%2026-Q1
RHUMBLINE ADVISERS added187,223$3M0.1%2026-Q1
PDT Partners, LLC182,986$3M0.1%2026-Q1
Rafferty Asset Management, LLC trimmed182,977$3M0.1%2026-Q1
HighVista Strategies LLC added182,929$3M0.1%2026-Q1
Neo Ivy Capital Management trimmed168,753$3M0.1%2026-Q1
BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed164,887$3M0.1%2026-Q1
VANGUARD GROUP INC added10,128,113$198M5.2%2025-Q4 stale
RA CAPITAL MANAGEMENT, L.P.9,714,392$92M2.4%2025-Q2 stale
RTW INVESTMENTS, LP added2,890,567$37M1.0%2025-Q3 stale
Paradigm Biocapital Advisors LP new1,898,950$24M0.6%2025-Q3 stale
Candriam S.C.A. added1,057,263$21M0.5%2025-Q4 stale
EVENTIDE ASSET MANAGEMENT, LLC added680,305$13M0.3%2025-Q4 stale
Integral Health Asset Management, LLC added800,000$10M0.3%2025-Q3 stale
JACOBS LEVY EQUITY MANAGEMENT, INC added729,606$9M0.2%2025-Q3 stale
FEDERATED HERMES, INC. trimmed464,797$9M0.2%2025-Q4 stale
VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed710,044$9M0.2%2025-Q3 stale
Nantahala Capital Management, LLC trimmed702,884$9M0.2%2025-Q3 stale
MPM ASSET MANAGEMENT LLC682,376$9M0.2%2025-Q3 stale
DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) added812,408$8M0.2%2025-Q1 stale
Balyasny Asset Management L.P. trimmed432,986$8M0.2%2025-Q4 stale
SCHRODER INVESTMENT MANAGEMENT GROUP added386,953$7M0.2%2025-Q4 stale
Point72 Asset Management, L.P. trimmed329,345$6M0.2%2025-Q4 stale
CANADA PENSION PLAN INVESTMENT BOARD284,000$6M0.1%2025-Q4 stale
Schonfeld Strategic Advisors LLC added415,927$5M0.1%2025-Q3 stale
AMERICAN CENTURY COMPANIES INC added168,304$3M0.1%2025-Q4 stale
NEUBERGER BERMAN GROUP LLC trimmed165,482$3M0.1%2025-Q4 stale
Jain Global LLC trimmed162,047$3M0.1%2025-Q4 stale
First Light Asset Management, LLC trimmed155,231$3M0.1%2025-Q4 stale
Lisanti Capital Growth, LLC added154,445$3M0.1%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.

HoldersTotal shares

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.

Learn how to read institutional ownership