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Disclosery

DYN DYNE THERAPEUTICS INC

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Stock (common), issuer CIK 1818794

197 managers (199 13F filers) reported a position in DYN shares at 2025-06-30, 128,613,996 shares in all. 23 filers opened a position and 30 filers sold out during the quarter.

Managers
197
13F filers
199
New
23
Added
95
Reduced
53
Sold out
30
Shares held by filers
128,613,996

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, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, 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
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.9,714,392$92.5M1.56%013F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson9,437,962$89.9M0.04%-915,45413F-HRTimelineGroup
Atlas Venture Life Science Advisors, LLC9,130,465$86.9M13.12%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.8,078,428$76.9M<0.01%+31,49013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC7,651,157$72.8M<0.01%+244,81313F-HRTimelineGroup
FCPM III SERVICES B.V.in group FCPM III SERVICES B.V.5,462,846$52M14.09%013F-HRTimelineGroup
FMR LLCin group FMR LLC5,293,369$50.4M<0.01%+98,07513F-HRTimelineGroup
Siren, L.L.C.in group Siren, L.L.C.4,836,437$46M2.38%+2,118,45013F-HRTimelineGroup
TCG Crossover Management, LLC3,766,660$35.9M4.1%+1,116,51013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP3,355,678$31.9M<0.01%-253,97313F-HRTimelineGroup
BRAIDWELL LP3,273,349$31.2M1.07%-347,99513F-HRTimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…3,191,000$30.4M0.05%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO3,086,779$29.4M<0.01%+555,46613F-HRTimelineGroup
ARMISTICE CAPITAL, LLC2,560,000$24.4M0.92%-208,00013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/2,383,953$22.7M<0.01%+563,53813F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,253,670$21.5M<0.01%+298,16513F-HRTimelineGroup
PERCEPTIVE ADVISORS LLCin group PERCEPTIVE ADVISORS LLC2,247,390$21.4M0.8%-66,01313F-HRTimelineGroup
Venrock Adviser, LLC2,173,913$20.7M1.55%013F-HRTimeline
Logos Global Management LP1,900,000$18.1M2.42%+1,400,00013F-HRTimeline
T. Rowe Price Investment Management, In…1,793,590$17.1M0.01%+625,61513F-HRTimeline
RTW INVESTMENTS, LP1,690,567$16.1M0.23%013F-HRTimeline
Frazier Life Sciences Management, L.P.1,505,984$14.3M0.57%+62,64313F-HRTimeline
Saturn V Capital Management LP1,455,429$13.9M5.62%new13F-HRTimeline
MPM BIOIMPACT LLC1,446,361$13.8M2.39%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources1,390,140$13.2M<0.01%-24,69513F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,362,176$13M<0.01%-29,41113F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,340,443$12.8M<0.01%+345,55713F-HRTimelineGroup
Vivo Capital, LLC1,114,960$10.6M1.09%013F-HRTimeline
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC1,031,400$9.82M0.25%+16,78913F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC943,874$8.99M0.01%-2,065,51513F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP841,037$8.01M<0.01%+118,57513F-HRTimelineGroup
Qube Research & Technologies Ltd791,987$7.54M0.01%+111,15113F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC791,120$7.53M0.03%-597,30513F-HRTimeline
FRONTIER CAPITAL MANAGEMENT CO LLC789,425$7.52M0.07%+499,82213F-HRTimeline
ArrowMark Colorado Holdings LLC770,225$7.33M0.13%-127,72113F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co745,071$7.09M<0.01%+90,94013F-HRTimelineGroup
Nantahala Capital Management, LLCin group Nantahala Capital Management,…745,062$7.09M0.5%+400,00013F-HRTimelineGroup
Vestal Point Capital, LP727,500$6.93M0.36%-1,072,50013F-HRTimeline
MPM ASSET MANAGEMENT LLC682,376$6.5M14.99%013F-HRTimeline
Sofinnova Investments, Inc.614,865$5.85M0.4%-102,03113F-HRTimeline
Jain Global LLC596,167$5.68M0.09%new13F-HRTimeline
Rock Springs Capital Management LP580,998$5.53M0.34%+56,49913F-HRTimeline
Woodline Partners LP574,853$5.47M0.03%+41813F-HRTimeline
ALGERT GLOBAL LLC558,896$5.32M0.11%+82,88913F-HR/ATimeline
WASATCH ADVISORS LP557,937$5.31M0.03%+46,88913F-HRTimeline
Candriam S.C.A.524,161$4.99M0.03%+60,79313F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/513,801$4.89M<0.01%+243,82513F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.508,940$4.85M<0.01%+221,28713F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management488,498$4.65M0.01%new13F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc483,963$4.61M0.01%+169,37713F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP447,807$4.26M0.01%new13F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding415,436$3.95M-100,109Timeline
PDT Partners, LLC385,248$3.67M0.21%+161,07213F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA374,969$3.57M<0.01%+374,23413F-HR/ATimelineGroup
Ikarian Capital, LLCin group Ikarian Capital, LLC363,837$3.46M1.15%+5,00013F-HRTimelineGroup
Trexquant Investment LP362,310$3.45M0.04%+27,86713F-HRTimeline
Schonfeld Strategic Advisors LLC333,453$3.17M0.02%+187,15913F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC320,490$3.05M<0.01%+89,26613F-HR/ATimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\318,653$3.03M<0.01%+98913F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC285,004$2.71M<0.01%+78,03913F-HRTimelineGroup
Cubist Systematic Strategies, LLC278,362$2.65M0.03%+162,82813F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS277,259$2.64M<0.01%+129,89413F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp269,664$2.57M<0.01%+37,03813F-HRTimelineGroup
Ensign Peak Advisors, Inc266,073$2.53M<0.01%+245,92313F-HRTimeline
Palo Alto Investors LP264,976$2.52M0.54%-68,41513F-HRTimeline
SPHERA FUNDS MANAGEMENT LTD.in group SPHERA FUNDS MANAGEMENT LTD.221,416$2.11M0.55%-107,84613F-HRTimelineGroup
SCHRODER INVESTMENT MANAGEMENT GROUP205,626$1.96M<0.01%-37,19913F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC200,266$1.91M<0.01%new13F-HR/ATimelineGroup
Nuveen, LLCin group TIAA199,831$1.9M<0.01%-23,38413F-HRTimelineGroup
TWINBEECH CAPITAL LP197,148$1.88M0.04%+138,62313F-HRTimeline
Exome Asset Management LLC195,933$1.87M1.54%-62,45813F-HR/ATimeline
DekaBank Deutsche Girozentrale60,000$1.85M<0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…186,015$1.77M<0.01%+31,66113F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC181,740$1.73M<0.01%+139,89613F-HR/ATimelineGroup
Darwin Wealth Management, LLC172,656$1.64M0.57%+120,56613F-HRTimeline
Engineers Gate Manager LP172,469$1.64M0.02%+87,55113F-HRTimeline
AXA S.A.in group AXA S.A.162,745$1.55M<0.01%-89,07213F-HRTimelineGroup
RHUMBLINE ADVISERS154,541$1.47M<0.01%+20,91413F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC142,719$1.36M<0.01%+64,54013F-HRTimelineGroup
Swiss National Bank140,400$1.34M<0.01%+22,10013F-HRTimeline
Tetragon Partners GP Ltdin group Tetragon Partners GP Ltd138,375$1.32M0.24%new13F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC128,962$1.23M<0.01%+11,95613F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd124,628$1.19M0.03%+43,96313F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.123,284$1.17M<0.01%-1,405,25013F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC120,084$1.14M0.04%+5,00613F-HRTimeline
SummitTX Capital, L.P.118,961$1.13M0.05%-10,89713F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC115,765$1.1M0.11%+23,11313F-HRTimeline
Rafferty Asset Management, LLC110,248$1.05M<0.01%-37,10513F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…101,612$967K<0.01%+47,97713F-HRTimeline
ALLIANCEBERNSTEIN L.P.98,240$935K<0.01%-69,38513F-HRTimeline
Invesco Ltd.in group Invesco Ltd.82,142$782K<0.01%+15,84913F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD79,354$755K<0.01%+10,72413F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc78,533$748K<0.01%+10,06013F-HRTimelineGroup
COMERICA BANK75,338$717K<0.01%+34,16213F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC66,413$632K<0.01%+7,00213F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC66,026$629K0.01%-11,32513F-HRTimeline
CITIGROUP INCin group CITIGROUP INC61,527$586K<0.01%-133,42813F-HRTimelineGroup
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding61,201$583K+950Timeline
MetLife Investment Management, LLCin group MetLife Investment Management…56,844$541K<0.01%+8,04813F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN56,705$540K<0.01%+16,54713F-HRTimelineGroup
ARCADIA INVESTMENT MANAGEMENT CORP/MI55,215$526K0.08%+10,35013F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC53,174$506K<0.01%+3,38813F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC51,480$490K<0.01%-1,61313F-HRTimelineGroup
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…51,011$486K0.01%+2,49513F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …49,886$475K<0.01%+10,02213F-HRTimelineGroup
NORGES BANK49,319$470K<0.01%-60,60313F-HRTimeline
ExodusPoint Capital Management, LP46,270$440K0.01%-72,59913F-HRTimeline
Voleon Capital Management LP44,723$426K0.02%-14,95013F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…44,051$420K<0.01%new13F-HR/ATimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…43,925$418K<0.01%-23,95213F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC42,910$409K<0.01%+19,35013F-HRTimelineGroup
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC40,621$387K<0.01%-3,05913F-HRTimelineGroup
Aegis Wealth Management LLC33,228$348K0.21%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd36,463$347K0.01%+4,88913F-HRTimelineGroup
Verition Fund Management LLC35,923$342K<0.01%+23,18113F-HRTimeline
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …34,674$330K<0.01%-26213F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…34,018$324K<0.01%-2,30413F-HRTimelineGroup
CAPITAL FUND MANAGEMENT S.A.27,250$259K<0.01%new13F-HRTimeline
HighVista Strategies LLC26,324$251K0.09%-52,09613F-HRTimeline
Privium Fund Management B.V.27,566$239K0.05%013F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND24,973$238K<0.01%013F-HR/ATimeline
Virtu Financial LLCin group Virtu Financial LLC24,319$232K0.01%new13F-HRTimelineGroup
PROFUND ADVISORS LLC23,642$225K0.01%-7,07713F-HRTimeline
ProShare Advisors LLC23,490$224K<0.01%+29413F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC23,063$220K0.04%-7,03613F-HRTimelineGroup
China Universal Asset Management Co., L…22,829$217K0.02%+13913F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM21,441$204K<0.01%+3,94013F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP21,284$203K0.01%-87,09013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…20,605$196K<0.01%013F-HRTimeline
Police & Firemen's Retirement System of…20,334$194K<0.01%+3,15513F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS19,700$188K<0.01%+3,32013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…19,247$183K<0.01%013F-HRTimeline
AlphaQuest LLC18,317$174K0.02%+1,98513F-HRTimeline
Compagnie Lombard Odier SCmA18,000$171K<0.01%+11,00013F-HRTimeline
CAXTON ASSOCIATES LLP16,599$158K<0.01%+1,62713F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC16,330$157K<0.01%-12,06613F-HRTimelineGroup
111 Capital15,458$147K0.03%new13F-HRTimeline
KLP KAPITALFORVALTNING AS15,200$145K<0.01%+4,30013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…15,123$144K<0.01%new13F-HRTimelineGroup
OPTIMIZE FINANCIAL INC.14,657$140K0.09%-10413F-HRTimeline
Creative Planningin group Creative Planning14,541$138K<0.01%+2,79713F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP13,931$133K0.01%-84,66613F-HRTimeline
Graham Capital Management, L.P.13,488$128K<0.01%-48,78113F-HRTimeline
SIMPLEX TRADING, LLC13,247$126K<0.01%+4,45213F-HRTimeline
SG Americas Securities, LLC12,768$122K<0.01%-417,28313F-HRTimeline
E Fund Management Co., Ltd.12,274$117K0.01%-1,49713F-HRTimeline
Bryce Point Capital, LLC12,055$115K0.1%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC11,953$114K<0.01%-13,69913F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC11,705$111K<0.01%new13F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC11,377$108K0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…10,495$99.9K<0.01%+7,69713F-HRTimelineGroup
FARALLON CAPITAL MANAGEMENT, L.L.C.10,000$95.2K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…9,582$91.2K<0.01%+95513F-HRTimelineGroup
Point72 (DIFC) Ltd7,451$70.9K0.01%+8213F-HRTimeline
Quarry LP7,000$66.6K0.02%+2,50013F-HRTimeline
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…6,503$61.9K0.02%+9013F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,740$55K<0.01%013F-HRTimeline
KBC Group NVin group KBC Group NV3,135$30K<0.01%013F-HRTimelineGroup
CWM, LLCin group CWM, LLC3,030$29K<0.01%+1,90013F-HRTimelineGroup
AMALGAMATED BANK2,802$27K<0.01%013F-HRTimeline
GF FUND MANAGEMENT CO. LTD.2,605$24.8K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC2,126$20.2K<0.01%-1,40013F-HRTimeline
Sterling Capital Management LLC1,797$17.1K<0.01%+1,71413F-HR/ATimeline
Steward Partners Investment Advisory, L…1,350$12.9K<0.01%new13F-HRTimeline
Caitong International Asset Management …1,308$12.5K0.01%-1,78413F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,199$11.5K<0.01%013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC1,025$9.76K<0.01%-47513F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.753$7.17K<0.01%+55613F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …632$6K<0.01%new13F-HRTimelineGroup
GAMMA Investing LLC512$4.87K<0.01%+26113F-HRTimeline
Allworth Financial LP475$4.52K<0.01%-2313F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.371$4K<0.01%013F-HRTimelineGroup
GPS Wealth Strategies Group, LLC400$3.81K<0.01%013F-HRTimeline
First Horizon Advisors, Inc.371$3.53K<0.01%+23713F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\342$3.26K<0.01%-96613F-HRTimelineGroup
Truvestments Capital LLC295$2.81K<0.01%013F-HRTimeline
SIGNATUREFD, LLC290$2.76K<0.01%-44113F-HRTimeline
MassMutual Private Wealth & Trust, FSB243$2.31K<0.01%new13F-HRTimeline
Arax Advisory Partners230$2.19K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…210$2K<0.01%+18513F-HRTimelineGroup
IFP Advisors, Inc0$1.8K<0.01%new13F-HRTimelineAmount filed as zero, left out of ratios.
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…156$1.49K<0.01%+12113F-HRTimelineGroup
Kestra Investment Management, LLCin group Kestra Advisory Services, LLC151$1.44K<0.01%new13F-HR/ATimelineGroup
Essential Partners LLC143$1.36K<0.01%13F-HRTimeline
ROTHSCHILD INVESTMENT LLC125$1.19K<0.01%+3513F-HRTimeline
Washington Trust Advisors, Inc.125$1.19K<0.01%013F-HRTimeline
Brooklyn Investment Group121$1.15K<0.01%new13F-HR/ATimeline
SBI Securities Co., Ltd.99$942<0.01%+3013F-HRTimeline
Parallel Advisors, LLC62$590<0.01%+3513F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/51$486<0.01%+5013F-HR/ATimelineGroup
Parkside Financial Bank & Trust50$476<0.01%-3013F-HRTimeline
Versant Capital Management, Inc44$419<0.01%-23913F-HRTimeline
Aspect Partners, LLC25$238<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.20$190<0.01%-713F-HR/ATimelineGroup
Federation des caisses Desjardins du Qu…20$190<0.01%013F-HRTimeline
Smartleaf Asset Management LLC9$86<0.01%new13F-HRTimeline
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.

Events

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

    Accepted , ingested