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Disclosery

MTSR METSERA INC

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COM (common)

151 managers (155 13F filers) reported a position in MTSR shares at 2025-09-30, 64,760,639 shares in all. 68 filers opened a position and 23 filers sold out during the quarter.

Managers
151
13F filers
155
New
68
Added
45
Reduced
20
Sold out
23
Shares held by filers
64,760,639

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

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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
FMR LLCin group FMR LLC13,891,986$727M0.04%-1,866,34413F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC5,824,993$305M<0.01%+4,333,51413F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson5,352,751$280M0.13%+1,964,78813F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.3,835,309$201M<0.01%+2,598,18413F-HRTimelineGroup
Alphabet Inc.in group Alphabet Inc.3,783,528$198M8.22%-1,178,21613F-HRTimelineGroup
Venrock Adviser, LLC3,750,662$196M11.05%013F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…3,659,465$191M0.03%+232,03313F-HRTimelineGroup
SOFTBANK GROUP CORP.in group SOFTBANK GROUP CORP.3,654,691$191M0.74%-1,165,19313F-HRTimelineGroup
HBK INVESTMENTS L P3,200,000$167M2.47%new13F-HRTimeline
STATE STREET CORPin group STATE STREET CORP2,511,076$131M<0.01%+1,910,87313F-HRTimelineGroup
Alpha Wave Global, LP2,384,050$125M12.64%013F-HRTimeline
T. Rowe Price Investment Management, In…2,327,354$122M0.07%-677,49913F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,403,002$73.4M<0.01%+936,04713F-HRTimelineGroup
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.675,525$35.4M0.44%013F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co511,465$26.8M<0.01%+375,05913F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/455,605$23.8M<0.01%+404,92813F-HR/ATimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP437,839$22.9M<0.01%+302,09113F-HRTimelineGroup
Woodline Partners LP400,785$21M0.1%013F-HRTimeline
Cormorant Asset Management, LP400,000$20.9M1.44%013F-HRTimeline
EVENTIDE ASSET MANAGEMENT, LLC396,160$20.7M0.34%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO325,178$17M<0.01%+309,75313F-HR/ATimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…323,836$16.9M0.1%new13F-HR/ATimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC286,448$15M0.01%-1,22613F-HRTimelineGroup
EcoR1 Capital, LLC271,529$14.2M0.68%013F-HRTimeline
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC270,662$14.2M0.48%new13F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC221,064$11.6M<0.01%+164,97313F-HR/ATimelineGroup
Wealthspire Advisors, LLC213,085$11.2M0.06%new13F-HRTimeline
ALPINE ASSOCIATES MANAGEMENT INC.195,200$10.2M0.62%new13F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management177,228$9.27M0.02%new13F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC176,847$9.25M<0.01%+137,89713F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding169,818$8.89M+70,465Timeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…168,477$8.82M0.01%+147,18913F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp163,726$8.57M<0.01%+124,20513F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC152,521$7.98M0.79%new13F-HRTimelineGroup
Avidity Partners Management LP140,500$7.35M1.67%new13F-HRTimeline
Man Group plcin group Man Group plc140,000$7.33M0.01%new13F-HRTimelineGroup
Nuveen, LLCin group TIAA126,111$6.6M<0.01%+88,64913F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC120,356$6.3M<0.01%new13F-HRTimelineGroup
Ensign Peak Advisors, Inc107,318$5.62M0.01%013F-HR/ATimeline
Rafferty Asset Management, LLC103,465$5.41M0.02%+84,17313F-HRTimeline
ROYCE & ASSOCIATES LP102,300$5.35M0.05%-228,98013F-HRTimeline
Greenwich Wealth Management LLC93,224$4.88M0.24%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY92,938$4.86M<0.01%+29,13213F-HR/ATimelineGroup
SCS Capital Management LLC89,375$4.68M0.05%new13F-HRTimeline
Schonfeld Strategic Advisors LLC76,393$4M0.03%new13F-HRTimeline
RHUMBLINE ADVISERS73,144$3.83M<0.01%+47,56413F-HRTimeline
Verition Fund Management LLC70,928$3.71M0.02%+59,27213F-HRTimeline
TD Asset Management Inc67,732$3.54M<0.01%+30,90013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC59,451$3.11M<0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN59,071$3.09M<0.01%+42,03913F-HRTimelineGroup
TIG Advisors, LLCin group TIG Advisors, LLC58,353$3.05M0.19%new13F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/54,328$2.84M<0.01%-1,314,24513F-HRTimeline
CITIGROUP INCin group CITIGROUP INC54,241$2.84M<0.01%+43,28713F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.53,603$2.81M<0.01%-1,367,75613F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC49,943$2.61M0.01%-6,72313F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC47,650$2.49M<0.01%new13F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCgroup of 2 filers holding45,625$2.39MnewTimeline
Swiss National Bank40,700$2.13M<0.01%+60013F-HRTimeline
Vestcor Inc40,000$2.09M0.06%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\38,926$2.04M<0.01%+27,04213F-HRTimelineGroup
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…36,104$1.89M0.07%new13F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.31,676$1.66M<0.01%+19,70213F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…31,324$1.64M0.01%+20,47013F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…30,093$1.57M<0.01%+19,42813F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP29,963$1.57M<0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …28,844$1.51M<0.01%-26,38813F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP27,691$1.45M<0.01%new13F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC27,526$1.44M<0.01%-203,29213F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC25,923$1.36M0.08%new13F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC25,607$1.34M0.01%-14,92113F-HRTimeline
SG Americas Securities, LLC23,612$1.24M<0.01%-24,05213F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc23,491$1.23M<0.01%+24513F-HRTimelineGroup
PROFUND ADVISORS LLC22,319$1.17M0.04%new13F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…21,877$1.14M<0.01%-2,12813F-HRTimeline
WATER ISLAND CAPITAL LLC18,730$980K0.14%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd18,207$953K0.05%new13F-HRTimelineGroup
HARVEST MANAGEMENT LLC18,000$942K0.46%new13F-HRTimeline
Quinn Opportunity Partners LLC17,951$939K0.07%new13F-HRTimeline
Qube Research & Technologies Ltd16,034$839K<0.01%new13F-HRTimeline
GABELLI FUNDS LLCin group GAMCO Investors (Gabelli)15,000$785K0.01%new13F-HRTimelineGroup
Police & Firemen's Retirement System of…14,640$766K0.01%+10,34713F-HRTimeline
ProShare Advisors LLC14,413$754K<0.01%new13F-HRTimeline
CSS LLC/IL13,531$708K0.04%new13F-HRTimeline
Keebeck Wealth Management12,262$642K0.08%new13F-HRTimeline
Walleye Capital LLCgroup of 2 filers holding11,230$588KnewTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS10,859$568K<0.01%+9,25913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP10,770$564K<0.01%new13F-HRTimelineGroup
Quantinno Capital Management LP10,756$563K<0.01%new13F-HRTimeline
HAMILTON LANE ADVISORS LLC9,810$513K0.3%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC9,494$497K<0.01%new13F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…9,320$488K<0.01%new13F-HRTimeline
Knollwood Investment Advisory, LLC9,227$483K0.04%new13F-HRTimeline
SIMPLEX TRADING, LLC9,114$476K0.01%+3,31613F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP8,743$458K<0.01%-4,37113F-HRTimelineGroup
FIFTH LANE CAPITAL, LP8,333$436K0.44%new13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC6,835$358K<0.01%-9,23513F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM6,205$325K<0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND6,000$314K<0.01%013F-HRTimeline
CIBC Bancorp USA Inc.in group CIBC Bancorp USA Inc.5,691$298K<0.01%13F-HR/ATimelineGroup
INTECH INVESTMENT MANAGEMENT LLC5,632$295K<0.01%-8,42813F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO5,561$291K<0.01%new13F-HRTimelineGroup
Greenland Capital Management LP5,415$283K0.04%new13F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC5,363$281K<0.01%new13F-HRTimeline
Centerpoint Advisors, LLC5,319$278K0.09%new13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…5,300$277K<0.01%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS5,118$268K<0.01%new13F-HRTimeline
Rangeley Capital, LLC5,000$262K0.25%new13F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth4,905$257K<0.01%new13F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …4,680$245K<0.01%new13F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC4,631$242K<0.01%new13F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…4,561$239K<0.01%new13F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…4,460$233K0.01%+2,90013F-HRTimelineGroup
KLP KAPITALFORVALTNING AS4,300$225K<0.01%013F-HRTimeline
Quantbot Technologies LP4,286$224K0.01%new13F-HRTimeline
XPONANCE LLC4,177$219K<0.01%new13F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding3,946$206KnewTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,692$193K0.01%+2,05413F-HRTimelineGroup
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…3,290$172K0.05%+57113F-HRTimelineGroup
STRS OHIO2,800$147K<0.01%013F-HRTimeline
Clearstead Advisors, LLC1,867$97.7K<0.01%+1,86413F-HRTimeline
AMALGAMATED BANK1,730$91K<0.01%+1,19813F-HRTimeline
Sterling Capital Management LLC1,697$88.8K<0.01%+1,48213F-HRTimeline
SBI Securities Co., Ltd.1,601$83.8K<0.01%+1,28613F-HRTimeline
SIGNATUREFD, LLC1,030$53.9K<0.01%new13F-HRTimeline
Penserra Capital Management LLCin group Penserra Capital Management L…959$50K<0.01%new13F-HRTimelineGroup
Caitong International Asset Management …834$43.6K0.03%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA752$39K<0.01%+36913F-HRTimelineGroup
CWM, LLCin group CWM, LLC564$30K<0.01%-2913F-HRTimelineGroup
GAMMA Investing LLC539$28.2K<0.01%+15813F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.362$12.8K<0.01%-58413F-HRTimelineGroup
Arax Advisory Partners243$12.7K<0.01%+20413F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…207$10.8K<0.01%+1713F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …190$10K<0.01%new13F-HRTimelineGroup
Parallel Advisors, LLC153$8.01K<0.01%new13F-HRTimeline
MassMutual Private Wealth & Trust, FSB138$7.22K<0.01%013F-HRTimeline
Bell Investment Advisors, Inc135$7.07K<0.01%013F-HRTimeline
Versant Capital Management, Inc76$3.98K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC75$3.92K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…72$3.77K<0.01%+2113F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC51$2.67K<0.01%+3613F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\45$2.35K<0.01%new13F-HRTimelineGroup
True Wealth Design, LLC30$1.57K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP25$1.31K<0.01%013F-HRTimelineGroup
Allworth Financial LP23$1.2K<0.01%new13F-HRTimeline
Parkside Financial Bank & Trust20$1.05K<0.01%013F-HRTimeline
Farther Finance Advisors, LLC12$628<0.01%new13F-HRTimeline
Scarborough Advisors, LLC10$523<0.01%new13F-HRTimeline
IFP Advisors, Inc8$419<0.01%013F-HR/ATimeline
Sunbelt Securities, Inc.3$157<0.01%new13F-HRTimeline
Essential Partners LLC1$52<0.01%013F-HRTimeline
Covestor Ltd6$00%013F-HRTimelineValue filed as zero, left out of ratios.