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Disclosery

DYN DYNE THERAPEUTICS INC

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Stock (common), issuer CIK 1818794

204 managers (206 13F filers) reported a position in DYN shares at 2025-03-31, 122,010,700 shares in all. 47 filers opened a position and 43 filers sold out during the quarter.

Managers
204
13F filers
206
New
47
Added
81
Reduced
44
Sold out
43
Shares held by filers
122,010,700

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
Posner Brian Sdirector2026-10-02+2,500 P$16Form 4

13F holders, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
JANUS HENDERSON GROUP PLCin group Janus Henderson10,353,416$118M0.06%+2,974,10713F-HRTimelineGroup
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.9,714,392$102M1.7%+3,333,24813F-HRTimelineGroup
Atlas Venture Life Science Advisors, LLC9,130,465$95.5M18.3%+1,111,11113F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.8,046,938$84.2M<0.01%+97,53613F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC7,406,344$77.5M<0.01%+702,41813F-HRTimelineGroup
FCPM III SERVICES B.V.in group FCPM III SERVICES B.V.5,462,846$57.1M13.81%013F-HRTimelineGroup
FMR LLCin group FMR LLC5,195,294$54.3M<0.01%-2,801,63713F-HRTimelineGroup
BRAIDWELL LP3,621,344$37.9M1.33%+2,940,16213F-HRTimeline
STATE STREET CORPin group STATE STREET CORP3,609,651$37.8M<0.01%-107,73213F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC3,009,389$31.5M0.03%+147,80813F-HRTimelineGroup
ARMISTICE CAPITAL, LLC2,768,000$29M0.77%+1,803,48213F-HRTimeline
Siren, L.L.C.in group Siren, L.L.C.2,717,987$28.4M1.6%+1,370,53113F-HR/ATimelineGroup
TCG Crossover Management, LLC2,650,150$27.7M3.78%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO2,531,313$26.5M<0.01%+2,432,92613F-HRTimelineGroup
PERCEPTIVE ADVISORS LLCin group PERCEPTIVE ADVISORS LLC2,313,403$24.2M0.86%+1,770,12613F-HR/ATimelineGroup
Venrock Adviser, LLC2,173,913$22.7M1.93%013F-HRTimeline
Deep Track Capital, LP2,000,000$20.9M0.68%013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,955,505$20.5M<0.01%+68,17613F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/1,820,415$19M<0.01%-582,03713F-HRTimeline
Vestal Point Capital, LP1,800,000$18.8M1.34%new13F-HRTimeline
RTW INVESTMENTS, LP1,690,567$17.7M0.27%-3,528,07413F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.1,528,534$16M0.04%+603,85313F-HR/ATimelineGroup
Frazier Life Sciences Management, L.P.1,443,341$15.1M0.69%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources1,414,835$14.8M<0.01%+91,03213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,391,587$14.6M<0.01%+637,99413F-HRTimelineGroup
VOLORIDGE INVESTMENT MANAGEMENT, LLC1,388,425$14.5M0.05%+1,269,41013F-HRTimeline
T. Rowe Price Investment Management, In…1,167,975$12.2M0.01%new13F-HRTimeline
Vivo Capital, LLC1,114,960$11.7M1.54%013F-HRTimeline
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC1,014,611$10.6M0.25%-212,46913F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC994,886$10.4M<0.01%+366,18313F-HR/ATimelineGroup
ArrowMark Colorado Holdings LLC897,946$9.39M0.15%-34,28513F-HRTimeline
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…812,408$8.5M0.17%+376,75513F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP722,462$7.56M<0.01%-54,55113F-HRTimelineGroup
Sofinnova Investments, Inc.716,896$7.5M0.57%-354,60213F-HRTimeline
MPM ASSET MANAGEMENT LLC682,376$7.14M10.28%013F-HRTimeline
Qube Research & Technologies Ltd680,836$7.12M0.01%+413,45913F-HRTimeline
BAKER BROS. ADVISORS LPin group BAKER BROS. ADVISORS LP672,096$7.03M0.08%013F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co654,131$6.84M<0.01%-13,32113F-HR/ATimelineGroup
Woodline Partners LP574,435$6.01M0.04%+47813F-HRTimeline
Rock Springs Capital Management LP524,499$5.49M0.31%+49,97113F-HRTimeline
UBS Group AGgroup of 2 filers holding515,545$5.39M-167,930Timeline
WASATCH ADVISORS LP511,048$5.35M0.03%+190,42213F-HRTimeline
Logos Global Management LP500,000$5.23M0.93%+50,00013F-HRTimeline
ALGERT GLOBAL LLC476,007$4.98M0.12%+395,08413F-HR/ATimeline
Candriam S.C.A.463,368$4.85M0.03%+61,97313F-HRTimeline
Integral Health Asset Management, LLC450,000$4.71M0.52%+300,00013F-HRTimeline
SG Americas Securities, LLC430,051$4.5M0.02%+411,01513F-HRTimeline
Ikarian Capital, LLCin group Ikarian Capital, LLC358,837$3.75M1.22%new13F-HRTimelineGroup
Nantahala Capital Management, LLCin group Nantahala Capital Management,…345,062$3.61M0.3%new13F-HRTimelineGroup
Trexquant Investment LP334,443$3.5M0.04%+209,06513F-HRTimeline
Palo Alto Investors LP333,391$3.49M0.66%new13F-HRTimeline
SPHERA FUNDS MANAGEMENT LTD.in group SPHERA FUNDS MANAGEMENT LTD.329,262$3.44M0.85%+93,00013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\317,664$3.32M<0.01%+246,70313F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc314,586$3.29M0.01%+288,78313F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC289,603$3.03M0.03%-8,44913F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.287,653$3.01M<0.01%+153,88113F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/269,976$2.82M<0.01%+147,33513F-HRTimelineGroup
SCHRODER INVESTMENT MANAGEMENT GROUP242,825$2.78M<0.01%+95,82313F-HRTimeline
Exome Asset Management LLC258,391$2.7M2.42%new13F-HR/ATimeline
AXA S.A.in group AXA S.A.251,817$2.63M0.01%+63,16613F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp232,626$2.43M<0.01%-2,17213F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC231,224$2.42M<0.01%+38,98513F-HR/ATimelineGroup
PDT Partners, LLC224,176$2.34M0.17%new13F-HRTimeline
Nuveen, LLCin group TIAA223,215$2.33M<0.01%13F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC206,965$2.16M<0.01%-12,67013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC194,955$2.04M<0.01%+52,03813F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.167,625$1.75M<0.01%+14,40713F-HRTimeline
DekaBank Deutsche Girozentrale60,000$1.71M<0.01%013F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC154,634$1.62M0.02%new13F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…154,354$1.61M<0.01%+74,84013F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS147,365$1.54M<0.01%+80,36713F-HRTimelineGroup
Rafferty Asset Management, LLC147,353$1.54M0.01%-20,12913F-HRTimeline
Schonfeld Strategic Advisors LLC146,294$1.53M0.01%new13F-HRTimeline
RHUMBLINE ADVISERS133,627$1.4M<0.01%+5,38313F-HR/ATimeline
SummitTX Capital, L.P.129,858$1.36M0.06%13F-HRTimeline
ExodusPoint Capital Management, LP118,869$1.24M0.02%new13F-HRTimeline
Swiss National Bank118,300$1.24M<0.01%+9,70013F-HRTimeline
Darwin Wealth Management, LLC52,090$1.23M0.41%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC117,006$1.22M<0.01%-11,28413F-HR/ATimelineGroup
Cubist Systematic Strategies, LLC115,534$1.21M0.02%-3,53113F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC115,078$1.2M0.04%new13F-HRTimeline
NORGES BANK109,922$1.15M<0.01%-840,18213F-HR/ATimeline
DARK FOREST CAPITAL MANAGEMENT LP108,374$1.13M0.05%new13F-HRTimeline
Casdin Capital, LLC100,000$1.05M0.09%new13F-HRTimeline
Ratan Capital Management LP98,900$1.03M0.33%-132,00013F-HRTimeline
GSA CAPITAL PARTNERS LLP98,597$1.03M0.09%new13F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC92,652$969K0.1%new13F-HRTimeline
Engineers Gate Manager LP84,918$888K0.01%new13F-HRTimeline
STEMPOINT CAPITAL LP84,430$883K0.28%new13F-HRTimeline
TUDOR INVESTMENT CORP ET AL81,266$850K0.01%+38,00213F-HRTimeline
Y-Intercept (Hong Kong) Ltd80,665$844K0.06%+70,89713F-HRTimeline
HighVista Strategies LLC78,420$820K0.32%013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC78,179$818K<0.01%+40,64313F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC77,351$809K0.01%+43,37513F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD68,630$718K<0.01%-5,74813F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc68,473$716K<0.01%+813F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…67,877$710K<0.01%-48,85213F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.66,293$693K<0.01%+25,97013F-HRTimelineGroup
Graham Capital Management, L.P.62,269$651K0.02%new13F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding60,251$641K+3,280Timeline
Voleon Capital Management LP59,673$624K0.05%new13F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC59,411$621K<0.01%-1,93713F-HRTimeline
TWINBEECH CAPITAL LP58,525$612K0.01%new13F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…53,635$561K<0.01%013F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC53,093$555K<0.01%-46,23513F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC49,786$521K<0.01%-200,01713F-HR/ATimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…48,796$510K<0.01%-67113F-HRTimelineGroup
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…48,516$507K0.01%+16813F-HR/ATimelineGroup
ARCADIA INVESTMENT MANAGEMENT CORP/MI44,865$469K0.08%-7513F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC43,680$457K<0.01%+17,66213F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC41,844$438K<0.01%-9,77213F-HR/ATimelineGroup
COMERICA BANK41,176$431K<0.01%+5,76713F-HRTimeline
Corebridge Financial, Inc.in group Corebridge Financial, Inc.40,946$428K<0.01%-5013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN40,158$420K<0.01%+1,40413F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …39,864$417K<0.01%-57,53113F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…36,322$380K<0.01%-2,22813F-HRTimelineGroup
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …34,936$365K0.01%+22113F-HRTimelineGroup
Aegis Wealth Management LLC33,228$348K0.2%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd31,574$330K0.02%new13F-HRTimelineGroup
PROFUND ADVISORS LLC30,719$321K0.01%-1,87513F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC30,099$315K0.06%new13F-HRTimelineGroup
Privium Fund Management B.V.27,566$288K0.08%+7,20013F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC28,396$286K<0.01%+15,04213F-HRTimelineGroup
Skandinaviska Enskilda Banken AB (publ)26,816$280K<0.01%013F-HRTimeline
Mariner, LLCin group Mariner, LLC25,652$268K<0.01%+14,49513F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND24,973$261K<0.01%013F-HR/ATimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC23,560$246K<0.01%new13F-HRTimelineGroup
ProShare Advisors LLC23,196$243K<0.01%-4,84813F-HRTimeline
China Universal Asset Management Co., L…22,690$237K0.02%+1,11513F-HRTimeline
Handelsbanken Fonder AB22,500$235K<0.01%013F-HRTimeline
TD Asset Management Inc21,656$227K<0.01%-50,37413F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…21,422$224K0.01%+8,83813F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
HRT FINANCIAL LP21,345$223K<0.01%+4,62313F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…20,605$216K<0.01%013F-HRTimeline
Ensign Peak Advisors, Inc20,150$211K<0.01%-295,45213F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…19,247$201K<0.01%+3,49613F-HRTimeline
Nebula Research & Development LLC17,834$187K0.02%new13F-HRTimeline
Point72 Asia (Singapore) Pte. Ltd.17,805$186K0.05%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM17,501$183K<0.01%+1,48113F-HRTimeline
Police & Firemen's Retirement System of…17,179$180K<0.01%013F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.17,088$179K0.03%new13F-HRTimeline
Bayesian Capital Management, LP16,400$172K0.03%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS16,380$171K<0.01%-513F-HRTimeline
AlphaQuest LLC16,332$171K0.02%new13F-HRTimeline
Bridgefront Capital, LLC15,540$163K0.05%new13F-HRTimeline
CAXTON ASSOCIATES LLP14,972$157K0.01%13F-HRTimeline
OPTIMIZE FINANCIAL INC.14,761$154K0.11%new13F-HR/ATimeline
E Fund Management Co., Ltd.13,771$144K0.01%+1,92313F-HRTimeline
Verition Fund Management LLC12,742$133K<0.01%-9,96013F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP12,569$131K<0.01%-87,00913F-HRTimelineGroup
Creative Planningin group Creative Planning11,744$123K<0.01%new13F-HRTimelineGroup
KLP KAPITALFORVALTNING AS10,900$114K<0.01%013F-HRTimeline
FARALLON CAPITAL MANAGEMENT, L.L.C.10,000$105K<0.01%-219,12113F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
SIMPLEX TRADING, LLC8,795$91K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…8,627$90.2K<0.01%013F-HRTimelineGroup
Point72 (DIFC) Ltd7,369$77.1K0.01%+94913F-HRTimeline
Compagnie Lombard Odier SCmA7,000$73.2K<0.01%013F-HRTimeline
Virtus Investment Advisers, LLCgroup of 2 filers holding6,413$67.1K+3,637Timeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,740$60K<0.01%013F-HRTimeline
Quarry LP4,500$47.1K0.01%new13F-HRTimeline
GROUP ONE TRADING LLC3,526$36.9K<0.01%+2,91313F-HRTimeline
KBC Group NVin group KBC Group NV3,135$33K<0.01%013F-HRTimelineGroup
Caitong International Asset Management …3,092$32.3K0.02%+2,44613F-HRTimeline
Aster Capital Management (DIFC) Ltd2,252$30.6K0.01%+2,23413F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,798$29.3K<0.01%-13,22013F-HRTimelineGroup
AMALGAMATED BANK2,802$29K<0.01%+1013F-HRTimeline
GF FUND MANAGEMENT CO. LTD.2,605$27.2K<0.01%+46813F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,500$15.7K<0.01%+79013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,199$13.7K<0.01%new13F-HR/ATimelineGroup
US BANCORP \DE\in group US BANCORP \DE\1,308$13.7K<0.01%-30113F-HRTimelineGroup
CWM, LLCin group CWM, LLC1,130$12K<0.01%+1,10713F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA735$8K<0.01%-1,38213F-HR/ATimelineGroup
SIGNATUREFD, LLC731$7.65K<0.01%+13313F-HRTimeline
Lindbrook Capital, LLC629$6.58K<0.01%+41013F-HRTimeline
Allworth Financial LP498$5.53K<0.01%new13F-HRTimeline
GPS Wealth Strategies Group, LLC400$4.18K<0.01%013F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.371$4K<0.01%013F-HRTimelineGroup
Truvestments Capital LLC295$3.09K<0.01%013F-HRTimeline
Versant Capital Management, Inc283$2.96K<0.01%new13F-HRTimeline
GAMMA Investing LLC251$2.62K<0.01%-2913F-HR/ATimeline
SVB WEALTH LLC250$2.62K<0.01%new13F-HRTimeline
QUADRANT CAPITAL GROUP LLC231$2.42K<0.01%013F-HRTimeline
Arax Advisory Partners230$2.41K<0.01%-2013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.197$2.06K<0.01%new13F-HRTimelineGroup
First Horizon Advisors, Inc.134$1.4K<0.01%-2213F-HRTimeline
Washington Trust Advisors, Inc.125$1.31K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC90$941<0.01%+3013F-HRTimeline
Sterling Capital Management LLC83$868<0.01%013F-HRTimeline
Parkside Financial Bank & Trust80$837<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.69$722<0.01%+5013F-HRTimeline
CoreCap Advisors, LLC47$492<0.01%+4013F-HRTimeline
Larson Financial Group LLC46$481<0.01%new13F-HRTimeline
MAI Capital Management45$471<0.01%new13F-HRTimeline
Stephens Consulting, LLC35$367<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…35$366<0.01%+3213F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.27$282<0.01%+1213F-HRTimelineGroup
Parallel Advisors, LLC27$282<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…25$262<0.01%+413F-HRTimelineGroup
Aspect Partners, LLC25$262<0.01%-70013F-HRTimeline
WealthTrak Capital Management LLC20$210<0.01%new13F-HRTimeline

Events

  • Posner Brian S bought 2,500 DYN shares on 2026-10-02, Form 4 filed 2026-10-06. 0001193125-26-415584

    Accepted , ingested