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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.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Korro Bio, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
1 filing
1 insider, $78.8K in total
Open-market sells
8 filings
3 insiders, $2.82M in total
Insiders trading
4
Net value
−$2.75M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Korro Bio, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Korro Bio, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Formela Jean FrancoisDirector132,650IndirectSep 15, 20268
Dolan OliverSenior Vice President, Finance16,241Sep 14, 20266
Nichols Weston10% Owner1,544,980IndirectAug 13, 20262
Lynx1 Capital Management LP10% Owner1,544,980IndirectAug 13, 20262
Aiyar RamPresident and CEO69,046Aug 5, 20264
Vincent Loic AChief Scientific Officer25,797Jul 17, 20264
Cerio JeffreyGeneral Counsel41,793Jul 17, 20264
Chappell ToddChief Operating Officer24,464Jul 17, 20264
Bermingham NessanDirector35,114Jun 11, 20261
Pearson Timothy RDirector–Jun 11, 20261
Behbahani AliDirector1,297,893IndirectJun 11, 20262
Knobil KatharineDirector–Jun 11, 20261
Meyers RachelDirector–Jun 11, 20261
New Enterprise Associates 17, L.P.10% Owner1,297,893Mar 12, 20261
NEA Partners 17, L.P.10% Owner1,297,893Mar 12, 20261
Nea 17 GP, LLC10% Owner1,297,893Mar 12, 20261
Sandell Scott D10% Owner1,297,893IndirectMar 12, 20261
Baskett Forest10% Owner1,297,893IndirectMar 12, 20261
Mathers Edward T10% Owner1,297,893IndirectMar 12, 20261
Walker Paul Edward10% Owner1,297,893IndirectMar 12, 20261
Florence Anthony A. Jr.10% Owner1,297,893IndirectMar 12, 20261
Makhzoumi Mohamad10% Owner1,297,893IndirectMar 12, 20261
Chang Carmen10% Owner1,297,893IndirectMar 12, 20261
Yang Rick10% Owner1,297,893IndirectMar 12, 20261
Agarwal VineetChief Financial Officer0Feb 5, 20250
Olugemo OlukemiChief Medical Officer–Feb 5, 20250
Lucchino David L.Director22,150Jun 12, 20240
Atlas Venture Opportunity Fund II, L.P.10% Owner195,074Apr 23, 20240
Atlas Venture Associates Opportunity II, LLC10% Owner195,074Apr 23, 20240
Atlas Venture Associates Opportunity II, LP10% Owner195,074Apr 23, 20240
Colletti SteveChief Scientific Officer–Nov 7, 20230
Walker Shelby J.See Remarks–Nov 7, 20230
Mitrano Richard J.VP Finance & Operations48,457Aug 22, 20230
Loose Christopher R.Chief Scientific Officer183,650Jul 31, 20230
LeBel CarlChief Development Officer26,343Jan 27, 20230
Arnold Wendy SChief People Officer21,186Jan 27, 20230
McCubbin QuentinChief Manufacturing Officer38,340Jan 27, 20230
Barberich Timothy JDirector–Aug 19, 20220
Marcus Joel SDirector–Aug 19, 20220
Langer RobertDirector–Aug 19, 20220
Feldmann Cynthia LDirector–Aug 19, 20220
Huang MichaelDirector–Aug 19, 20220
Cohen Marc ADirector–Jun 23, 20220
Pfreundschuh Peter P.Chief Financial Officer8,927Feb 23, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 22, 2023 (view filing)Aug 18-214 daysLucchino David L.President and CEOSSale−5.92K$0.5484−$3.25K−0.9%633.7K after2 lots10b5-1
Aug 18, 2023 (view filing)Aug 16-172 daysMitrano Richard J.VP Finance & OperationsSSale−464$0.6452−$299.38−0.9%48.9K after2 lots10b5-1
Aug 18, 2023 (view filing)Aug 16-172 daysLucchino David L.President and CEOSSale−5.63K$0.6403−$3.60K−0.9%639.7K after2 lots10b5-1
Aug 16, 2023 (view filing)Aug 14-152 daysMitrano Richard J.VP Finance & OperationsSSale−466$0.6449−$300.52−0.9%49.4K after2 lots10b5-1
Aug 16, 2023 (view filing)Aug 14-152 daysLucchino David L.President and CEOSSale−5.51K$0.6491−$3.58K−0.8%645.3K after2 lots10b5-1
Aug 14, 2023 (view filing)Aug 10-114 daysLucchino David L.President and CEOSSale−5.52K$0.6751−$3.73K−0.8%650.8K after2 lots10b5-1
Aug 14, 2023 (view filing)Aug 10-114 daysMitrano Richard J.VP Finance & OperationsSSale−487$0.64−$311.68−1.0%49.9K after2 lots10b5-1
Aug 10, 2023 (view filing)Aug 8-92 daysLucchino David L.President and CEOSSale−5.61K$0.68−$3.81K−0.8%656.3K after2 lots10b5-1
Aug 10, 2023 (view filing)Aug 8-92 daysMitrano Richard J.VP Finance & OperationsSSale−479$0.665−$318.55−0.9%50.3K after2 lots10b5-1
Aug 9, 2023 (view filing)Aug 4-75 daysLateLucchino David L.President and CEOSSale−5.41K$0.6847−$3.70K−0.8%661.9K after2 lots10b5-1
Aug 9, 2023 (view filing)Aug 4-75 daysLateMitrano Richard J.VP Finance & OperationsSSale−455$0.6803−$309.55−0.9%50.8K after2 lots10b5-1
Aug 4, 2023 (view filing)4:09 PM ETAug 2-32 daysMitrano Richard J.VP Finance & OperationsSSale−463$0.5251−$243.11−0.9%51.3K after2 lots10b5-1
Aug 4, 2023 (view filing)Aug 2-32 daysLucchino David L.President and CEOSSale−5.27K$0.5556−$2.93K−0.8%667.3K after2 lots10b5-1
Aug 2, 2023 (view filing)4:36 PM ETJul 31-Aug 12 daysLucchino David L.President and CEOSSale−5.47K$0.4949−$2.71K−0.8%672.6K after2 lots10b5-1
Aug 2, 2023 (view filing)4:35 PM ETJul 31-Aug 12 daysMitrano Richard J.VP Finance & OperationsSSale−460$0.4897−$225.24−0.9%51.7K after2 lots10b5-1
Jul 31, 2023 (view filing)4:09 PM ETJul 27-284 daysMitrano Richard J.VP Finance & OperationsSSale−450$0.5003−$225.12−0.9%52.2K after2 lots10b5-1
Jul 31, 2023 (view filing)4:05 PM ETJul 27-284 daysLucchino David L.President and CEOSSale−5.44K$0.4905−$2.67K−0.8%678.1K after2 lots10b5-1
Jul 31, 2023 (view filing)4:01 PM ETJul 27-284 daysLoose Christopher R.Chief Scientific OfficerSSale−2.72K$0.4954−$1.35K−1.5%183.7K after2 lots10b5-1
Jul 27, 2023 (view filing)Jul 25-262 daysMitrano Richard J.VP Finance & OperationsSSale−456$0.5146−$234.66−0.9%52.6K after2 lots10b5-1
Jul 27, 2023 (view filing)Jul 25-262 daysLoose Christopher R.Chief Scientific OfficerSSale−2.72K$0.5049−$1.37K−1.4%186.4K after2 lots10b5-1
Jul 27, 2023 (view filing)Jul 25-262 daysLucchino David L.President and CEOSSale−5.41K$0.5096−$2.76K−0.8%683.5K after2 lots10b5-1
Jul 25, 2023 (view filing)Jul 21-244 daysLoose Christopher R.Chief Scientific OfficerSSale−2.77K$0.5737−$1.59K−1.4%189.1K after2 lots10b5-1
Jul 25, 2023 (view filing)Jul 21-244 daysLucchino David L.President and CEOSSale−5.55K$0.5736−$3.18K−0.8%688.9K after2 lots10b5-1
Jul 25, 2023 (view filing)Jul 21-244 daysMitrano Richard J.VP Finance & OperationsSSale−457$0.5844−$267.07−0.9%53.1K after2 lots10b5-1
Jul 21, 2023 (view filing)Jul 19-202 daysLoose Christopher R.Chief Scientific OfficerSSale−2.70K$0.645−$1.74K−1.4%191.9K after2 lots10b5-1
Jul 21, 2023 (view filing)Jul 19-202 daysLucchino David L.President and CEOSSale−5.36K$0.6449−$3.45K−0.8%694.5K after2 lots10b5-1
Jul 21, 2023 (view filing)Jul 19-202 daysMitrano Richard J.VP Finance & OperationsSSale−457$0.635−$290.2−0.8%53.6K after2 lots10b5-1
Jul 19, 2023 (view filing)Jul 17-182 daysMitrano Richard J.VP Finance & OperationsSSale−493$0.6045−$298.04−0.9%54.0K after2 lots10b5-1
Jul 19, 2023 (view filing)Jul 17-182 daysLucchino David L.President and CEOSSale−5.74K$0.618−$3.55K−0.8%699.8K after2 lots10b5-1
Jul 19, 2023 (view filing)Jul 17-182 daysLoose Christopher R.Chief Scientific OfficerSSale−2.90K$0.6137−$1.78K−1.5%194.6K after2 lots10b5-1
Jul 17, 2023 (view filing)4:23 PM ETJul 13-144 daysLoose Christopher R.Chief Scientific OfficerSSale−2.23K$0.4711−$1.05K−1.1%197.5K after2 lots10b5-1
Jul 17, 2023 (view filing)4:22 PM ETJul 13-144 daysLucchino David L.President and CEOSSale−4.46K$0.4714−$2.10K−0.6%705.6K after2 lots10b5-1
Jul 17, 2023 (view filing)4:20 PM ETJul 13-144 daysMitrano Richard J.VP Finance & OperationsSSale−375$0.4729−$177.33−0.7%54.5K after2 lots10b5-1
Jul 13, 2023 (view filing)4:42 PM ETJul 11-122 daysLoose Christopher R.Chief Scientific OfficerSSale−2.70K$0.3799−$1.02K−1.3%199.7K after2 lots10b5-1
Jul 13, 2023 (view filing)4:14 PM ETJul 11-122 daysLucchino David L.President and CEOSSale−5.38K$0.3798−$2.04K−0.8%710.0K after2 lots10b5-1
Jul 13, 2023 (view filing)4:09 PM ETJul 11-122 daysMitrano Richard J.VP Finance & OperationsSSale−448$0.3847−$172.36−0.8%54.9K after2 lots10b5-1
Jul 12, 2023 (view filing)9:25 PM ETJul 7-105 daysMitrano Richard J.VP Finance & OperationsSSale−440$0.365−$160.6−0.8%55.3K afterAmended2 lots10b5-1
Jul 12, 2023 (view filing)9:22 PM ETJul 7-105 daysLucchino David L.President and CEOSSale−5.22K$0.3649−$1.91K−0.7%715.4K afterAmended2 lots10b5-1
Jul 12, 2023 (view filing)9:20 PM ETJul 7-105 daysLoose Christopher R.Chief Scientific OfficerSSale−2.61K$0.365−$952.64−1.3%202.4K afterAmended2 lots10b5-1
Jul 12, 2023 (view filing)9:18 PM ETJul 66 daysMitrano Richard J.VP Finance & OperationsSSale−224$0.35−$78.4−0.4%55.8K afterAmended10b5-1
Jul 12, 2023 (view filing)9:16 PM ETJul 66 daysLucchino David L.President and CEOSSale−2.77K$0.34−$942.82−0.4%720.6K afterAmended10b5-1
Jul 12, 2023 (view filing)9:15 PM ETJul 66 daysLoose Christopher R.Chief Scientific OfficerSSale−1.38K$0.34−$470.56−0.7%198.7K afterAmended10b5-1
Jul 7, 2022 (view filing)Jul 61 dayMitrano Richard J.VP Finance & OperationsSSale−2.18K$1.54−$3.36K−6.6%31.0K after
Jul 7, 2022 (view filing)Jul 61 dayLoose Christopher R.Chief Scientific OfficerSSale−4.42K$1.53−$6.75K−8.1%50.0K after
Jul 7, 2022 (view filing)Jul 61 dayMcCubbin QuentinChief Manufacturing OfficerSSale−6.57K$1.52−$9.98K−14.6%38.3K after
Jul 7, 2022 (view filing)Jul 61 dayArnold Wendy SChief People OfficerSSale−5.64K$1.52−$8.57K−21.0%21.2K after
Jul 7, 2022 (view filing)Jul 61 dayLeBel CarlChief Development OfficerSSale−4.42K$1.52−$6.72K−14.4%26.3K after
Feb 23, 2022 (view filing)Feb 18-225 daysLoose Christopher R.Chief Scientific OfficerSSale−2.04K$3.69−$7.54K−5.5%34.8K after2 lots
Feb 23, 2022 (view filing)Feb 18-225 daysPfreundschuh Peter P.Chief Financial OfficerSSale−2.95K$3.70−$10.9K−24.8%8.93K after2 lots
Feb 23, 2022 (view filing)Feb 18-225 daysLeBel CarlChief Development OfficerSSale−2.04K$3.69−$7.54K−15.5%11.1K after2 lots