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Korro Bio, Inc.

KRRO
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001703647

In the last 90 days, Korro Bio, Inc. insiders filed 1 open-market purchase and 8 sales; 106 institutions reported holding it in 13F filings for Q2 2026, worth $190.1M in total; no superinvestor holds it.

13F holders, Q1 2025

Institutional positions in Korro Bio, Inc. as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
75
−8 vs. Q4 2024
Shares held
9.70M
+286.2K (+3.0%) vs. Q4 2024
Total value
$169.0M
−$189.6M (−52.9%) vs. Q4 2024
New holders
10
22 more added
Sold out
18
24 more reduced

1 institution that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2024: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting KRRO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2025: 75 institutions
Q1 2021: 115 institutionsQ2 2021: 91 institutionsQ3 2021: 88 institutionsQ4 2021: 84 institutionsQ1 2022: 86 institutionsQ2 2022: 58 institutionsQ3 2022: 55 institutionsQ4 2022: 50 institutionsQ1 2023: 43 institutionsQ2 2023: 41 institutionsQ3 2023: 42 institutionsQ4 2023: 40 institutionsQ1 2024: 49 institutionsQ2 2024: 64 institutionsQ3 2024: 71 institutionsQ4 2024: 84 institutionsQ1 2025: 75 institutionsQ2 2025: 71 institutionsQ3 2025: 92 institutionsQ4 2025: 83 institutionsQ1 2026: 99 institutionsQ2 2026: 106 institutions
Value heldQ1 2025: $169.0M
Q1 2021: $186.6MQ2 2021: $193.9MQ3 2021: $130.4MQ4 2021: $90.2MQ1 2022: $33.1MQ2 2022: $13.0MQ3 2022: $14.1MQ4 2022: $28.3MQ1 2023: $2.52MQ2 2023: $1.67MQ3 2023: $2.58MQ4 2023: $301.5MQ1 2024: $618.6MQ2 2024: $285.7MQ3 2024: $285.3MQ4 2024: $359.6MQ1 2025: $169.0MQ2 2025: $114.8MQ3 2025: $465.5MQ4 2025: $60.6MQ1 2026: $144.8MQ2 2026: $190.1M
Institutions holding KRRO and their total value by quarter
QuarterHoldersValue
Q2 2026106$190.1M
Q1 202699$144.8M
Q4 202583$60.6M
Q3 202592$465.5M
Q2 202571$114.8M
Q1 202575$169.0M
Q4 202484$359.6M
Q3 202471$285.3M
Q2 202464$285.7M
Q1 202449$618.6M
Q4 202340$301.5M
Q3 202342$2.58M
Q2 202341$1.67M
Q1 202343$2.52M
Q4 202250$28.3M
Q3 202255$14.1M
Q2 202258$13.0M
Q1 202286$33.1M
Q4 202184$90.2M
Q3 202188$130.4M
Q2 202191$193.9M
Q1 2021115$186.6M

Institutions, Q1 2025

Shares, value and share of portfolio for each institution holding Korro Bio, Inc.; share changes are against Q4 2024.

Institutions holding KRRO in Q1 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Atlas Venture Life Science Advisors, LLC1,137,149$19.8M3.79%00.0%Unchanged
NEA Management Company, LLC1,090,793$19.0M1.46%00.0%Unchanged
Deep Track Capital, LP874,614$15.2M0.49%00.0%Unchanged
Alliancebernstein L.P.680,517$11.8M0.00%−25,277−3.6%Reduced
FMR LLC643,269$11.2M0.00%+1,530+0.2%Added
Driehaus Capital Management LLC582,449$10.1M0.10%+87,544+17.7%Added
Point72 Asset Management, L.P.520,890$9.07M0.03%+26,893+5.4%Added
BlackRock, Inc.441,430$7.69M0.00%−11,019−2.4%Reduced
Siren, L.L.C.418,833$7.29M0.41%00.0%Unchanged
Vanguard Group Inc381,799$6.65M0.00%−7,691−2.0%Reduced
Cormorant Asset Management, LP380,303$6.62M0.50%+380,303New
Qiming U.S. Ventures Management, LLC368,085$6.41M27.74%00.0%Unchanged
72 Investment Holdings, LLC276,831$4.82M13.54%00.0%Unchanged
Citadel Advisors LLC253,250$4.41M0.00%−116,483−31.5%Reduced
Polar Capital Holdings Plc250,000$4.35M0.03%+175,000+233.3%Added
Geode Capital Management, LLC140,221$2.44M0.00%+3,134+2.3%Added
Tri Locum Partners LP128,381$2.24M1.15%−15,835−11.0%Reduced
State Street Corp122,438$2.13M0.00%−1,641−1.3%Reduced
Millennium Management LLC108,869$1.90M0.00%+13,061+13.6%Added
Franklin Resources Inc91,704$1.60M0.00%−53−0.1%Reduced
Standard Life Aberdeen plc84,428$1.47M0.00%+84,428New
UBS Group AG74,211$1.29M0.00%+1,172+1.6%Added
ADAR1 Capital Management, LLC68,715$1.20M0.23%+10,737+18.5%Added
Ally Bridge Group (NY) LLC59,723$1.04M0.94%−10,955−15.5%Reduced
Northern Trust Corp58,211$1.01M0.00%−2,336−3.9%Reduced
Woodline Partners LP50,094$872.1K0.01%−52,000−50.9%Reduced
DAFNA Capital Management LLC47,086$819.8K0.23%+47,086New
Morgan Stanley43,100$750.4K0.00%+14,538+50.9%Added
Rock Springs Capital Management LP35,719$621.9K0.04%00.0%Unchanged
OrbiMed Advisors LLC32,400$564.1K0.01%00.0%Unchanged
Walleye Capital LLC30,955$538.9K0.01%−10,273−24.9%Reduced
Schonfeld Strategic Advisors LLC30,475$530.6K0.00%−82,590−73.0%Reduced
Goldman Sachs Group Inc20,944$364.6K0.00%−2,357−10.1%Reduced
Charles Schwab Investment Management Inc18,288$318.4K0.00%+790+4.5%Added
Raymond James Financial Inc18,222$317.2K0.00%+7,875+76.1%Added
Blair William & Co16,230$282.6K0.00%+3,335+25.9%Added
Bank of New York Mellon Corp16,113$280.5K0.00%+1,325+9.0%Added
Nuveen, LLC12,145$211.4K0.00%+12,145New
XTX Topco Ltd10,600$184.5K0.01%+10,600New
Susquehanna International Group, LLP10,372$180.6K0.00%+10,372New
Quest Partners LLC9,196$160.1K0.02%+7,007+320.1%Added
Rhumbline Advisers9,069$157.9K0.00%−533−5.6%Reduced
Barclays PLC7,241$126.1K0.00%−3,143−30.3%Reduced
Royal Bank of Canada6,097$106.0K0.00%−1,623−21.0%Reduced
Citigroup Inc4,831$84.1K0.00%−467−8.8%Reduced
Bank of America Corp4,541$79.1K0.00%−2,496−35.5%Reduced
Wells Fargo & Company3,793$66.0K0.00%+401+11.8%Added
Mirae Asset Global ETFs Holdings Ltd.3,658$63.7K0.00%+156+4.5%Added
MetLife Investment Management3,639$63.4K0.00%00.0%Unchanged
Deutsche Bank AG3,616$63.0K0.00%−494−12.0%Reduced
JPMorgan Chase & Co3,069$53.4K0.00%+215+7.5%Added
Corebridge Financial, Inc.3,019$52.6K0.00%−14−0.5%Reduced
New York State Common Retirement Fund3,000$52.2K0.00%00.0%Unchanged
Quarry LP2,011$35.0K0.01%+2,011New
North Star Investment Management Corp.1,800$31.3K0.00%00.0%Unchanged
Police & Firemen's Retirement System of New Jersey1,226$21.3K0.00%00.0%Unchanged
Tower Research Capital LLC (TRC)764$13.3K0.00%+486+174.8%Added
Steward Partners Investment Advisory, LLC650$11.3K0.00%+100+18.2%Added
Ameritas Investment Partners, Inc.598$10.4K0.00%00.0%Unchanged
GAMMA Investing LLC593$10.3K0.00%+585+7,312.5%Added
Legal & General Group Plc566$9.85K0.00%−3,759−86.9%Reduced
California State Teachers Retirement System442$7.70K0.00%−4,408−90.9%Reduced
Duncker Streett & Co Inc437$7.61K0.00%00.0%Unchanged
BNP Paribas Arbitrage, SA373$6.49K0.00%−6,615−94.7%Reduced
Nisa Investment Advisors, LLC331$5.76K0.00%+305+1,173.1%Added
Amalgamated Bank211$4.00K0.00%00.0%Unchanged
Sterling Capital Management LLC82$1.43K0.00%−64−43.8%Reduced
Federated Hermes, Inc.64$1.11K0.00%+64New
BNP Paribas59$1.03K0.00%+59New
CWM, LLC41$1.00K0.00%+39+1,950.0%Added
Spire Wealth Management39$6790.00%00.0%Unchanged
SBI Securities Co., Ltd.7$1220.00%00.0%Unchanged
MAI Capital Management5$880.00%00.0%Unchanged
True Wealth Design, LLC1$180.00%+1New
Advisor Group Holdings, Inc.1$170.00%00.0%Unchanged
Eventide Asset Management, LLC0$00.00%−117,556−100.0%Sold out
Verition Fund Management LLC0$00.00%−62,094−100.0%Sold out
Marshall Wace, LLP0$00.00%−18,461−100.0%Sold out
Wellington Management Group LLP0$00.00%−14,553−100.0%Sold out
Swiss National Bank0$00.00%−10,000−100.0%Sold out
Jane Street Group, LLC0$00.00%−7,604−100.0%Sold out
Balyasny Asset Management LLC0$00.00%−5,778−100.0%Sold out
Bank of Montreal0$00.00%−5,710−100.0%Sold out
HRT Financial LP0$00.00%−5,703−100.0%Sold out
Trexquant Investment LP0$00.00%−5,539−100.0%Sold out
KLP Kapitalforvaltning AS0$00.00%−1,400−100.0%Sold out
Meeder Asset Management Inc0$00.00%−357−100.0%Sold out
US Bancorp0$00.00%−87−100.0%Sold out
Signaturefd, LLC0$00.00%−41−100.0%Sold out
Caitong International Asset Management Co., Ltd0$00.00%−41−100.0%Sold out
Lindbrook Capital, LLC0$00.00%−31−100.0%Sold out
Nelson, Van Denburg & Campbell Wealth Management Group, LLC0$00.00%−20−100.0%Sold out
Allworth Financial LP0$00.00%−3−100.0%Sold out
Nuveen Asset Management, LLC––––Not filed