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Disclosery

KRRO KORRO BIO INC

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COMMON STOCK (common), issuer CIK 1703647

85 managers (85 13F filers) reported a position in KRRO shares at 2024-12-31, 9,447,028 shares in all. 19 filers opened a position and 9 filers sold out during the quarter.

Managers
85
13F filers
85
New
19
Added
33
Reduced
14
Sold out
9
Shares held by filers
9,447,028

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, Q4 2024

Filers in the available 13F reports with a share position at 2024-12-31, 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
Atlas Venture Life Science Advisors, LLC1,137,149$43.3M5.28%013F-HRTimeline
NEA Management Company, LLC1,090,793$41.5M2.34%013F-HRTimeline
Deep Track Capital, LP874,614$33.3M1.25%+24,61413F-HRTimeline
ALLIANCEBERNSTEIN L.P.705,794$26.9M0.01%new13F-HRTimeline
FMR LLCin group FMR LLC641,739$24.4M<0.01%+62,17613F-HRTimelineGroup
Driehaus Capital Management LLC494,905$18.8M0.16%+340,41013F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.493,997$18.8M0.05%+49,14713F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.452,449$17.2M<0.01%+2,49913F-HRTimelineGroup
Siren, L.L.C.in group Siren, L.L.C.418,833$15.9M0.7%013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC389,490$14.8M<0.01%-47,37113F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC369,733$14.1M0.01%-159,44013F-HRTimelineGroup
QIMING U.S. VENTURES MANAGEMENT, LLC368,085$14M27.4%013F-HRTimeline
72 Investment Holdings, LLC276,831$10.5M21.46%013F-HRTimeline
Tri Locum Partners LP144,216$5.49M1.14%+80,20213F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC137,087$5.22M<0.01%-41013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP124,079$4.72M<0.01%+5,31413F-HRTimelineGroup
EVENTIDE ASSET MANAGEMENT, LLC117,556$4.48M0.08%-273,61013F-HRTimeline
Schonfeld Strategic Advisors LLC113,065$4.3M0.03%-29,58013F-HRTimeline
Woodline Partners LP102,094$3.89M0.03%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC95,808$3.65M<0.01%+23,54713F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources91,757$3.49M<0.01%new13F-HRTimelineGroup
Polar Capital Holdings Plcin group Polar Capital Holdings Plc75,000$2.86M0.02%new13F-HRTimelineGroup
UBS Group AGin group UBS Group AG73,039$2.78M<0.01%+63,30913F-HRTimelineGroup
Ally Bridge Group (NY) LLC70,678$2.69M2.31%new13F-HRTimeline
Verition Fund Management LLC62,094$2.36M0.01%-31,19513F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP60,547$2.31M<0.01%+2,71713F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC57,978$2.21M0.45%+8,52713F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC41,228$1.57M0.01%new13F-HRTimelineGroup
Rock Springs Capital Management LP35,719$1.36M0.05%013F-HRTimeline
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC32,400$1.23M0.03%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY28,562$1.09M<0.01%+5,20713F-HR/ATimelineGroup
Nuveen Asset Management, LLCin group TIAA28,295$1.08M<0.01%+17,13113F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC23,301$887K<0.01%+10,48713F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP18,461$703K<0.01%new13F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co17,498$666K<0.01%-6913F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp14,788$563K<0.01%+43513F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…14,553$554K<0.01%+1,50113F-HRTimelineGroup
BLAIR WILLIAM & CO/IL12,895$491K<0.01%+69513F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC10,384$395K<0.01%new13F-HR/ATimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC10,347$394K<0.01%13F-HR/ATimelineGroup
Swiss National Bank10,000$381K<0.01%new13F-HRTimeline
RHUMBLINE ADVISERS9,602$366K<0.01%+69113F-HR/ATimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA7,720$294K<0.01%+7,04213F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC7,604$289K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/7,037$268K<0.01%+58113F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS6,988$266K<0.01%+2,07913F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management5,778$220K<0.01%new13F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/5,710$217K<0.01%new13F-HRTimelineGroup
HRT FINANCIAL LP5,703$217K<0.01%-93913F-HRTimeline
Trexquant Investment LP5,539$211K<0.01%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC5,298$202K<0.01%+86613F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…4,850$185K<0.01%+4,40813F-HR/ATimeline
Legal & General Group Plcin group Legal & General Group Plc4,325$165K<0.01%+3,75913F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\4,110$156K<0.01%+93513F-HR/ATimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…3,639$139K<0.01%013F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…3,502$133K<0.01%+15213F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN3,392$129K<0.01%+83113F-HRTimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.3,033$115K<0.01%-22813F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND3,000$114K<0.01%013F-HR/ATimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO2,854$109K<0.01%-9,53713F-HRTimelineGroup
AlphaQuest LLC2,189$83.3K0.01%+41213F-HRTimeline
North Star Investment Management Corp.1,800$68.5K<0.01%+80013F-HRTimeline
KLP KAPITALFORVALTNING AS1,400$53.3K<0.01%13F-HRTimeline
Police & Firemen's Retirement System of…1,226$46.7K<0.01%13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…598$22.8K<0.01%013F-HRTimelineGroup
Steward Partners Investment Advisory, L…550$20.9K<0.01%new13F-HRTimeline
DUNCKER STREETT & CO INC437$16.6K<0.01%013F-HRTimeline
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.357$13.6K<0.01%new13F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…278$10.6K<0.01%-15613F-HRTimelineGroup
AMALGAMATED BANK211$8K<0.01%013F-HRTimeline
Sterling Capital Management LLC146$5.56K<0.01%+13013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\87$3.31K<0.01%+213F-HRTimelineGroup
SIGNATUREFD, LLC41$1.56K<0.01%013F-HRTimeline
Caitong International Asset Management …41$1.56K<0.01%13F-HR/ATimeline
Spire Wealth Managementin group Spire Wealth Management39$1.49K<0.01%new13F-HRTimelineGroup
Lindbrook Capital, LLC31$1.18K<0.01%-1413F-HRTimeline
NISA INVESTMENT ADVISORS, LLC26$990<0.01%+413F-HRTimeline
Avior Wealth Management, LLC20$761<0.01%013F-HRTimeline
GAMMA Investing LLC8$305<0.01%+413F-HRTimeline
SBI Securities Co., Ltd.7$266<0.01%13F-HRTimeline
MAI Capital Management5$191<0.01%new13F-HRTimeline
Allworth Financial LP3$115<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1$38<0.01%-313F-HR/ATimelineGroup
CWM, LLCin group CWM, LLC2$00%-113F-HRTimelineGroupValue filed as zero, left out of ratios.
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$00%013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.