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Disclosery

SRZN SURROZEN INC

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COMMON STOCK (common), issuer CIK 1824893

56 managers (58 13F filers) reported a position in SRZN shares at 2026-03-31, 8,933,216 shares in all. 12 filers opened a position and 10 filers sold out during the quarter.

Managers
56
13F filers
58
New
12
Added
17
Reduced
13
Sold out
10
Shares held by filers
8,933,216

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

Each filer's latest stake. The shares are the aggregate the reporting persons state, which can include entities that file no 13F.

Insider trades

No Form 4 transaction on this security in the data.

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
TCG Crossover Management, LLC1,473,101$42.9M1.23%new13F-HRTimeline
Boxer Capital Management, LLCin group Boxer Capital Management, LLC766,318$22.3M2.93%+350,16813F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC731,138$21.3M0.02%+9,87213F-HRTimelineGroup
Venrock Adviser, LLC632,931$18.4M0.69%013F-HRTimeline
STEMPOINT CAPITAL LP525,639$13.5M2.59%-94,12713F-HR/ATimeline
Spruce Street Capital LP432,040$12.6M3.03%013F-HRTimeline
BRAIDWELL LP396,100$11.5M0.38%-73,90013F-HRTimeline
5AM Venture Management, LLC387,500$11.3M3.13%013F-HRTimeline
Kalehua Capital Management LLC385,178$11.2M7.94%013F-HR/ATimeline
Vestal Point Capital, LP338,611$9.86M0.28%new13F-HRTimeline
Vivo Capital, LLC260,000$7.57M0.63%013F-HR/ATimeline
PERCEPTIVE ADVISORS LLCin group PERCEPTIVE ADVISORS LLC229,393$6.68M0.13%new13F-HR/ATimelineGroup
Woodline Partners LP227,848$6.64M0.03%-2,72413F-HR/ATimeline
VANGUARD GROUP INCgroup of 3 filers holding207,052$6.03MnewTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management203,888$5.94M0.01%+13,39913F-HRTimelineGroup
Ikarian Capital, LLCin group Ikarian Capital, LLC173,107$5.04M0.72%+107,31913F-HRTimelineGroup
ACUTA CAPITAL PARTNERS, LLC172,847$5.04M3.58%-5,56813F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC159,711$4.65M<0.01%+94,02313F-HR/ATimelineGroup
SILVERARC CAPITAL MANAGEMENT, LLCin group SILVERARC CAPITAL MANAGEMENT,…144,255$4.2M0.5%-13,06813F-HRTimelineGroup
REGENTS OF THE UNIVERSITY OF CALIFORNIA133,207$3.88M0.13%013F-HR/ATimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…88,653$2.58M<0.01%013F-HRTimelineGroup
Euclidean Capital LLC87,696$2.55M0.65%013F-HRTimeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC71,697$2.09M0.01%-27,86313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC65,849$1.92M<0.01%-1,14613F-HRTimelineGroup
Eversept Partners, LP58,624$1.71M0.11%-36,66213F-HRTimeline
ArrowMark Colorado Holdings LLC55,123$1.61M0.04%013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC49,126$1.43M<0.01%+26,50013F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC47,299$1.38M0.03%+28,99213F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP39,482$1.15M<0.01%new13F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC35,469$1.03M<0.01%+20,72913F-HRTimelineGroup
Stonepine Capital Management, LLC33,005$961K0.85%-80,62613F-HRTimeline
683 Capital Management, LLCin group 683 Capital Management, LLC33,000$961K0.09%-8,99913F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.27,851$811K<0.01%+1,73313F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP27,726$808K<0.01%+3,40013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC25,851$753K<0.01%+2813F-HRTimelineGroup
LMR Partners LLPin group LMR Partners LLP23,557$686K0.01%013F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY22,446$654K<0.01%-14,51513F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/21,715$633K<0.01%013F-HRTimeline
UBS Group AGin group UBS Group AG21,247$619K<0.01%+21,18813F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP18,930$551K<0.01%+7,99113F-HRTimelineGroup
Qube Research & Technologies Ltd14,516$423K<0.01%new13F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP12,265$357K<0.01%-1,26513F-HRTimelineGroup
HRT FINANCIAL LP12,155$354K<0.01%new13F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC12,000$350K0.02%new13F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.10,188$297K<0.01%013F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…8,653$252K<0.01%new13F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS7,325$213K<0.01%+4,80513F-HRTimelineGroup
Persistent Asset Partners Ltd7,143$208K0.08%+2,78413F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC7,091$207K<0.01%-20,53113F-HRTimelineGroup
China Universal Asset Management Co., L…2,500$72.8K0.01%+1,00013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC1,888$55K<0.01%new13F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC1,508$43K<0.01%013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,119$30.7K<0.01%new13F-HR/ATimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA625$18K<0.01%+56013F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.29$845<0.01%new13F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1$29<0.01%new13F-HRTimelineGroup

Events

  • Boxer Capital Management, LLC and 3 other reporting persons reported 1,360,683 SRZN shares, 11.6% of the class, as of 2026-09-30, in a 13G/A filed 2026-10-07. 0001213900-26-107661

    Accepted , ingested

  • Commodore Capital LP and 3 other reporting persons reported 885,000 SRZN shares, 7.5% of the class, as of 2026-09-24, in a 13G filed 2026-10-01. 0001831942-26-000044

    Accepted , ingested