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Disclosery

DYN DYNE THERAPEUTICS INC

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Stock (common), issuer CIK 1818794

219 managers (228 13F filers) reported a position in DYN shares at 2026-03-31, 187,866,029 shares in all. 35 filers opened a position and 45 filers sold out during the quarter.

Managers
219
13F filers
228
New
35
Added
101
Reduced
60
Sold out
45
Shares held by filers
187,866,029

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 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
T. Rowe Price Investment Management, In…30,785,801$558M0.38%+13,245,71213F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson13,647,376$247M0.12%-240,34613F-HR/ATimelineGroup
BlackRock, Inc.in group BlackRock, Inc.11,699,870$212M<0.01%+509,03213F-HRTimelineGroup
VANGUARD GROUP INCgroup of 6 filers holding11,671,976$212MnewTimeline
Atlas Venture Life Science Advisors, LLC9,130,465$166M20.95%013F-HRTimeline
FMR LLCin group FMR LLC8,908,980$162M0.01%+2,339,05913F-HRTimelineGroup
Orbis Allan Gray Ltdin group Orbis Allan Gray Ltd6,762,231$123M0.52%+1,960,30313F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP6,653,746$121M<0.01%-38,99913F-HRTimelineGroup
PERCEPTIVE ADVISORS LLCin group PERCEPTIVE ADVISORS LLC4,668,839$84.6M1.67%+1,189,89513F-HR/ATimelineGroup
FCPM III SERVICES B.V.in group FCPM III SERVICES B.V.4,644,386$84.2M11.66%-818,46013F-HRTimelineGroup
TCG Crossover Management, LLC4,615,144$83.7M2.39%013F-HRTimeline
Vestal Point Capital, LP4,000,000$72.5M2.03%+3,880,00013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC3,504,114$63.5M<0.01%+240,68513F-HRTimelineGroup
ARMISTICE CAPITAL, LLC3,175,110$57.6M1.9%-74,59813F-HRTimeline
Frazier Life Sciences Management, L.P.3,153,082$57.2M1.47%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO3,253,473$55.6M<0.01%-296,43613F-HR/ATimelineGroup
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC2,917,884$52.9M1.15%+715,70013F-HRTimelineGroup
Franklin Resourcesgroup of 2 filers holding2,412,307$43.7M-2,125Timeline
PRICE T ROWE ASSOCIATES INC /MD/2,328,373$42.2M<0.01%+4,58413F-HRTimeline
Siren, L.L.C.in group Siren, L.L.C.2,229,125$40.4M1.12%-1,273,81613F-HRTimelineGroup
Venrock Adviser, LLC2,173,913$39.4M1.47%013F-HRTimeline
Deep Track Capital, LP2,000,000$36.3M0.75%-650,00013F-HRTimeline
SAMLYN CAPITAL, LLCin group SAMLYN CAPITAL, LLC1,922,543$34.9M0.6%+429,46813F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,723,116$31.2M<0.01%-560,07513F-HRTimelineGroup
BRAIDWELL LP1,681,998$30.5M1.02%+203,66913F-HRTimeline
Palo Alto Investors LP1,652,972$30M4.58%+180,77513F-HRTimeline
Sofinnova Investments, Inc.1,633,897$29.6M1.48%-620,26413F-HRTimeline
Vivo Capital, LLC1,557,466$28.2M2.35%-1,057,49413F-HR/ATimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/1,443,313$26.2M<0.01%+560,39113F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc1,430,384$25.9M0.04%+322,23913F-HRTimelineGroup
MPM BIOIMPACT LLC1,408,152$25.5M1.97%+2,76413F-HRTimeline
Logos Global Management LP1,400,000$25.4M1.31%+150,00013F-HRTimeline
Fiera Capital Corpin group Fiera Capital Corp1,380,620$25M0.09%new13F-HRTimelineGroup
Polar Capital Holdings Plcin group Polar Capital Holdings Plc1,359,169$24.6M0.11%+90,03813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,198,838$21.7M<0.01%+106,64713F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,158,390$21M<0.01%+7,06513F-HRTimelineGroup
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…1,000,000$18.1M0.03%-4,172,00013F-HRTimelineGroup
Rock Springs Capital Management LP972,198$17.6M1.04%+59,24313F-HRTimeline
Saturn V Capital Management LP966,609$17.5M3.17%-822,00713F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP951,589$17.2M<0.01%+853,51513F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY929,003$16.8M<0.01%-284,55613F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC834,176$15.1M0.03%+579,01613F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC821,849$14.9M0.15%-317,01913F-HRTimeline
BAKER BROS. ADVISORS LPin group BAKER BROS. ADVISORS LP813,449$14.7M0.08%013F-HRTimelineGroup
Nuveen, LLCin group TIAA718,333$13M<0.01%+97,02313F-HRTimelineGroup
ArrowMark Colorado Holdings LLC673,949$12.2M0.32%-26,70413F-HRTimeline
UBS Group AGgroup of 2 filers holding619,846$11.2M+24,377Timeline
Artisan Partners Limited Partnership619,457$11.2M0.02%-30,23413F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC533,600$9.67M0.02%+62,95513F-HRTimeline
TD Asset Management Inc529,312$9.6M0.01%+109,55613F-HRTimeline
STEMPOINT CAPITAL LP506,075$9.18M1.76%-329,12513F-HR/ATimeline
Ensign Peak Advisors, Inc496,590$9M0.02%013F-HR/ATimeline
University of Wisconsin Foundation484,745$8.79M7.8%+67,99513F-HRTimeline
ALGERT GLOBAL LLC454,463$8.24M0.12%+183,16013F-HR/ATimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC451,644$8.19M<0.01%-78,69413F-HRTimelineGroup
WASATCH ADVISORS LP443,668$8.04M0.05%+36,70813F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp401,616$7.28M<0.01%+48,11913F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND333,497$6.05M0.01%+254,23513F-HRTimeline
Fisher Asset Management, LLC323,051$5.86M<0.01%+72,98613F-HRTimeline
Catalio Capital Management, LP282,954$5.13M1.07%-236,76113F-HRTimeline
Tetragon Partners GP Ltdin group Tetragon Partners GP Ltd258,132$4.68M0.92%+10,13513F-HRTimelineGroup
Qube Research & Technologies Ltd253,153$4.59M0.01%-159,28713F-HRTimeline
Invesco Ltd.in group Invesco Ltd.248,941$4.51M<0.01%+111,25713F-HRTimelineGroup
Swiss National Bank228,100$4.14M<0.01%+5,60013F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\221,123$4.01M<0.01%+25,04313F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC201,144$3.65M<0.01%-970,48013F-HRTimelineGroup
SummitTX Capital, L.P.196,188$3.56M0.11%-47,08813F-HRTimeline
RHUMBLINE ADVISERS187,223$3.39M<0.01%+12,20313F-HRTimeline
PDT Partners, LLC182,986$3.32M0.2%013F-HRTimeline
Rafferty Asset Management, LLC182,977$3.32M0.01%-50,85813F-HRTimeline
HighVista Strategies LLC182,929$3.32M0.92%+123,28613F-HRTimeline
Neo Ivy Capital Management168,753$3.06M0.81%-68,71413F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …164,887$2.99M<0.01%-80513F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC162,972$2.95M<0.01%-34,71913F-HR/ATimelineGroup
SPHERA FUNDS MANAGEMENT LTD.in group SPHERA FUNDS MANAGEMENT LTD.160,594$2.91M0.5%-232,30013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC158,548$2.87M<0.01%-745,84113F-HRTimelineGroup
Burkehill Global Management, LP155,000$2.81M0.14%013F-HRTimeline
Darwin Wealth Management, LLC154,862$2.81M0.87%+39,59513F-HRTimeline
Woodline Partners LP149,388$2.71M0.01%+28,60013F-HR/ATimeline
ALLIANCEBERNSTEIN L.P.135,940$2.66M<0.01%+1,68013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN145,509$2.64M<0.01%-2,32213F-HR/ATimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…139,663$2.53M<0.01%+18,86313F-HRTimeline
Aegis Wealth Management LLC135,030$2.45M1.4%+59,12213F-HRTimeline
SG Americas Securities, LLC112,626$2.04M<0.01%-152,75813F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…108,724$1.97M<0.01%+10,50913F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc96,462$1.75M<0.01%-21,66013F-HRTimelineGroup
Man Group plcin group Man Group plc95,682$1.73M<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC86,609$1.57M<0.01%+17113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC84,238$1.53M<0.01%+13,57913F-HRTimelineGroup
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding84,057$1.51M+5,926Timeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP83,147$1.51M<0.01%-593,83213F-HRTimelineGroup
PROFUND ADVISORS LLC82,138$1.49M0.05%-4,60813F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP78,765$1.43M0.05%new13F-HRTimeline
TUDOR INVESTMENT CORP ET AL77,031$1.4M0.01%-70,59013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…72,841$1.32M0.01%+3,24213F-HRTimelineGroup
CIBC WORLD MARKET INC.69,215$1.25M<0.01%+44913F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD68,571$1.24M<0.01%+4,91813F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC68,393$1.24M<0.01%new13F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA68,188$1.24M<0.01%+49,64113F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd65,158$1.18M0.02%-278,56813F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …63,850$1.16M<0.01%-3,65713F-HRTimelineGroup
DekaBank Deutsche Girozentrale60,000$1.09M<0.01%013F-HRTimeline
Blackstone Inc.in group Blackstone Inc.57,107$1.04M<0.01%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…54,229$983K<0.01%new13F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC52,980$961K<0.01%+1,49613F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…52,152$946K<0.01%+14,84513F-HRTimeline
ARCADIA INVESTMENT MANAGEMENT CORP/MI49,475$897K0.15%+1,60013F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…48,882$886K<0.01%+1,78613F-HRTimelineGroup
MANGROVE PARTNERS IM, LLC47,927$869K0.07%new13F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC47,463$861K0.05%+4,78913F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO44,973$815K<0.01%-13,78213F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd42,710$774K0.01%-13,95113F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…40,036$726K<0.01%-191,97713F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…39,390$714K<0.01%+7,82813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS39,233$711K<0.01%+14,72713F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC37,797$685K<0.01%+1,14013F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…37,214$675K0.01%-120,75513F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC36,569$663K<0.01%-412,08913F-HRTimelineGroup
Police & Firemen's Retirement System of…36,304$658K0.01%+2,75713F-HRTimeline
SEVEN GRAND MANAGERS, LLC35,000$635K0.04%013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM31,658$574K<0.01%+24213F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC31,062$563K<0.01%new13F-HRTimelineGroup
Creative Planningin group Creative Planning29,945$543K<0.01%+10,17413F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC29,600$537K0.01%-14,68813F-HRTimeline
China Universal Asset Management Co., L…29,219$530K0.04%+5,94613F-HRTimeline
Trexquant Investment LP27,641$501K<0.01%-73,00413F-HRTimeline
Orion Porfolio Solutions, LLC27,048$490K<0.01%new13F-HRTimeline
ProShare Advisors LLC26,683$484K<0.01%-2,24313F-HRTimeline
MARTINGALE ASSET MANAGEMENT L P25,654$465K0.01%+50213F-HRTimeline
KLP KAPITALFORVALTNING AS25,400$461K<0.01%013F-HRTimeline
Elevate Capital Advisors, LLC24,600$446K0.29%+48613F-HRTimeline
Engineers Gate Manager LP24,420$443K0.01%+2,80113F-HRTimeline
Atom Investors LP24,078$437K0.03%new13F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…24,023$436K<0.01%+3,41813F-HRTimeline
E Fund Management Co., Ltd.23,001$417K0.01%13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC20,575$373K<0.01%new13F-HRTimelineGroup
PSP Research LLC20,000$363K0.26%-1,53513F-HRTimeline
Pavaki Capital Management LLC20,000$363K0.25%new13F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…19,372$351K<0.01%+6,40913F-HRTimelineGroup
Quantinno Capital Management LP19,297$350K<0.01%+6,70413F-HRTimeline
Z3 Capital Partners, LLC19,125$347K0.09%+4,07513F-HRTimeline
LPL Financial LLC18,364$333K<0.01%+3,11413F-HRTimeline
Lion Point Capital, LP18,000$326K1.95%013F-HRTimeline
Arrowpoint Investment Partners (Singapo…in group Arrowpoint Investment Partner…17,213$312K0.45%+2,83013F-HRTimelineGroup
STONERIDGE INVESTMENT PARTNERS LLC16,611$301K0.22%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC16,089$292K<0.01%new13F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP16,028$291K<0.01%new13F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…15,161$275K<0.01%+89313F-HRTimelineGroup
Allianz Asset Management GmbHin group Allianz SE15,000$272K<0.01%013F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS14,797$268K<0.01%-1,27713F-HRTimeline
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…14,150$257K0.07%+34413F-HRTimelineGroup
Graham Capital Management, L.P.13,172$239K0.01%-22,99513F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC12,236$222K<0.01%+1,16513F-HRTimelineGroup
XPONANCE LLC12,208$221K<0.01%new13F-HRTimeline
Inspire Investing, LLCgroup of 2 filers holding11,845$215KnewTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …11,801$214K<0.01%-2,59813F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…11,628$211K0.01%+10,89813F-HRTimelineGroup
CAPSTONE INVESTMENT ADVISORS, LLCin group CAPSTONE INVESTMENT ADVISORS,…11,217$203K<0.01%-1,48313F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…10,907$198K0.01%+46513F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC10,610$192K<0.01%-24,65013F-HRTimelineGroup
Scientech Research LLC10,564$192K0.16%new13F-HRTimeline
Caitong International Asset Management …10,405$189K0.03%new13F-HRTimeline
STEPHENS INC /AR/in group Stephens Investment Managemen…10,118$183K<0.01%new13F-HRTimelineGroup
FARALLON CAPITAL MANAGEMENT, L.L.C.10,000$181K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Caption Management, LLC7,894$143K0.01%+5,39413F-HRTimeline
Steward Partners Investment Advisory, L…6,880$125K<0.01%+2,00013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…5,740$104K<0.01%013F-HRTimeline
Keating Financial Advisory Services, In…5,093$92.3K0.01%+9313F-HRTimeline
CWM, LLCin group CWM, LLC4,430$80.3K<0.01%+40213F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP4,480$76.8K<0.01%+3,28113F-HRTimelineGroup
MARK SHEPTOFF FINANCIAL PLANNING, LLC4,150$72.5K0.04%new13F-HRTimeline
IFP Advisors, Inc3,766$68.3K<0.01%+3,67113F-HRTimeline
KBC Group NVin group KBC Group NV3,405$62K<0.01%+27013F-HRTimelineGroup
Sterling Capital Management LLC3,281$59.5K<0.01%-1,88513F-HRTimeline
GF FUND MANAGEMENT CO. LTD.3,208$58.2K<0.01%+40213F-HRTimeline
NISA INVESTMENT ADVISORS, LLC2,972$53.9K<0.01%-7,52713F-HRTimeline
Allworth Financial LP2,328$42.2K<0.01%+1,76913F-HRTimeline
Chung Wu Investment Group, LLC2,000$36.3K0.03%-80013F-HRTimeline
SIMPLEX TRADING, LLC1,734$31.4K<0.01%-7,45213F-HRTimeline
Hilton Head Capital Partners, LLC1,446$26.2K0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,290$23.4K<0.01%+65513F-HRTimelineGroup
Kemnay Advisory Services Inc.1,186$21.5K<0.01%new13F-HRTimeline
Quantbot Technologies LP1,098$19.9K<0.01%new13F-HRTimeline
GROUP ONE TRADING LLC1,073$19.5K<0.01%+42313F-HRTimeline
GAMMA Investing LLC1,049$19K<0.01%+20813F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\965$17.5K<0.01%+56513F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…921$16.7K<0.01%+50313F-HRTimelineGroup
Versant Capital Management, Inc859$15.6K<0.01%013F-HRTimeline
Larson Financial Group LLC796$14.4K<0.01%+77413F-HRTimeline
Quarry LP750$13.6K<0.01%new13F-HRTimeline
Smartleaf Asset Management LLC769$13.1K<0.01%+21413F-HRTimeline
Geneos Wealth Management Inc.691$12.5K<0.01%+55313F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC612$11.1K<0.01%-13,08013F-HRTimeline
Essential Partners LLC445$8.07K<0.01%013F-HRTimeline
FIRST HORIZON CORP409$7.42K<0.01%+2713F-HRTimeline
Truvestments Capital LLC295$5.35K<0.01%013F-HRTimeline
SIGNATUREFD, LLC278$5.04K<0.01%-4213F-HRTimeline
MassMutual Private Wealth & Trust, FSB243$4.41K<0.01%013F-HRTimeline
Aspect Partners, LLC225$4.08K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC210$3.81K<0.01%+4013F-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