Korro Bio KRRO Insider Ownership

NASDAQ KRRO

$12.97 +0.04 (+0.31%)

As of: Sep 10, 2026 · 1:11 PM EDT

Insider Holdings by Owner

11.47Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

13.82%

■0% pp QoQ

Shares Held by Insiders

1.30Mn

filed for Sep 2026

■0.00% QoQ

Shares Outstanding

9.39Mn

9,391,559 shares

Direct Holdings

Indirect: 1.30Mn

Net Shares Traded (QoQ)

no net change in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

KRRO's three largest insider shareholders as of September 09, 2026 are Capital Management Lp Lynx1 (TenPercentOwner, 1.54Mn shares), Capital Management Lp Lynx1 (TenPercentOwner, 1.54Mn shares), Capital Management Lp Lynx1 (TenPercentOwner, 1.54Mn shares).

A detailed ownership breakdown for Korro Bio is not available at this time.
According to Business Quant data, insider ownership at Korro Bio stands at 736.67%, comprising 1.30Mn shares out of 17.62Mn total outstanding.
Korro Bio's count of insider shares amounted to 1.30Mn as of September 09, 2026.
Among company executives at KRRO, Capital Management Lp Lynx1 (TenPercentOwner) led buying with 20.05K shares purchased between June 11, 2026 and September 09, 2026.
Conversely, Jean Francois Formela (Director) led selling activity at Korro Bio, with 312.34K shares sold over the same period ending September 09, 2026.

Form 4 Holdings

Insiders Holding KRRO

Insiders 23

Shares held 11.47Mn

Of outstanding 122.14%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Capital Management Lp Lynx1	TenPercentOwner	0	1,544,980	1,544,980	13.5%	13 Aug, 2026
2	Forest Baskett	TenPercentOwner	0	1,297,893	1,297,893	11.3%	12 Mar, 2026
3	Rick Yang	TenPercentOwner	0	1,297,893	1,297,893	11.3%	12 Mar, 2026
4	Paul Edward Walker	TenPercentOwner	0	1,297,893	1,297,893	11.3%	12 Mar, 2026
5	Anthony A. Jr. Florence	TenPercentOwner	0	1,297,893	1,297,893	11.3%	12 Mar, 2026
6	Ali Behbahani	Director, TenPercentOwner	0	1,297,893	1,297,893	11.3%	12 Mar, 2026
7	Carmen Chang	TenPercentOwner	0	1,297,893	1,297,893	11.3%	12 Mar, 2026
8	Enterprise Associates 17, L.P. New	TenPercentOwner	1,297,893	0	1,297,893	11.3%	12 Mar, 2026
9	Venture Opportunity Fund Ii, L.P. Atlas	TenPercentOwner	195,074	0	195,074	1.7%	23 Apr, 2024
10	Christopher R. Loose	Chief Scientific Officer	183,650	0	183,650	1.6%	31 Jul, 2023
11	Jean Francois Formela	Director	0	141,002	141,002	1.2%	28 Aug, 2026
12	Ram Aiyar	President And Ceo	69,046	0	69,046	0.6%	05 Aug, 2026
13	Richard J. Mitrano	Vp Finance Operations	48,457	0	48,457	0.4%	22 Aug, 2023
14	Jeffrey Cerio	General Counsel	41,793	0	41,793	0.4%	17 Jul, 2026
15	Quentin Mccubbin	Chief Manufacturing Officer	38,340	0	38,340	0.3%	07 Jul, 2022
16	Carl Lebel	Chief Development Officer	26,343	0	26,343	0.2%	07 Jul, 2022
17	Loic A Vincent	Chief Scientific Officer	25,797	0	25,797	0.2%	17 Jul, 2026
18	Todd Chappell	Chief Operating Officer	24,464	0	24,464	0.2%	17 Jul, 2026
19	Oliver Dolan	Senior Vice President, Finance	23,599	0	23,599	0.2%	17 Jul, 2026
20	David L. Lucchino	President And Ceo	22,150	0	22,150	0.2%	27 Nov, 2023
21	Nessan Bermingham	Director	702	0	702	0.0%	07 Nov, 2023
22	Wendy S Arnold	Chief People Officer	424	0	424	0.0%	07 Jul, 2022
23	Peter P. Pfreundschuh	Chief Financial Officer	179	0	179	0.0%	23 Feb, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

2,331 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
26 Aug, 2026	Jean Francois Formela	Director	Disposed S	249	$13.96	$3.48K	680,948	Indirect
26 Aug, 2026	Jean Francois Formela	Director	Disposed S	51	$13.96	$712	141,002	Indirect
19 Aug, 2026	Jean Francois Formela	Director	Disposed S	23,584	$14.00	$330.18K	681,197	Indirect
19 Aug, 2026	Jean Francois Formela	Director	Disposed S	4,884	$14.00	$68.38K	141,053	Indirect
06 Aug, 2026	Capital Management Lp Lynx1	TenPercentOwner	Acquired P	5,222	$11.40	$59.53K	1,543,518	Indirect
06 Aug, 2026	Capital Management Lp Lynx1	TenPercentOwner	Acquired P	5,222	$11.40	$59.53K	1,543,518	Indirect
06 Aug, 2026	Capital Management Lp Lynx1	TenPercentOwner	Acquired P	5,222	$11.40	$59.53K	1,543,518	Indirect
11 Aug, 2026	Jean Francois Formela	Director	Disposed S	1,775	$13.96	$24.78K	704,781	Indirect
10 Aug, 2026	Capital Management Lp Lynx1	TenPercentOwner	Acquired P	1,462	$13.19	$19.28K	1,544,980	Indirect
10 Aug, 2026	Capital Management Lp Lynx1	TenPercentOwner	Acquired P	1,462	$13.19	$19.28K	1,544,980	Indirect
11 Aug, 2026	Jean Francois Formela	Director	Disposed S	368	$13.96	$5.14K	145,937	Indirect
10 Aug, 2026	Capital Management Lp Lynx1	TenPercentOwner	Acquired P	1,462	$13.19	$19.28K	1,544,980	Indirect
04 Aug, 2026	Ram Aiyar	President And Ceo	Disposed S	5,802	$10.84	$62.92K	69,046	Direct
15 Jul, 2026	Todd Chappell	Chief Operating Officer	Acquired A	7,500	$0.00	$0	24,464	Direct
15 Jul, 2026	Loic A Vincent	Chief Scientific Officer	Acquired A	7,500	$0.00	$0	25,797	Direct
15 Jul, 2026	Oliver Dolan	Senior Vice President, Finance	Acquired A	5,500	$0.00	$0	23,599	Direct
15 Jul, 2026	Jeffrey Cerio	General Counsel	Acquired A	6,500	$0.00	$0	41,793	Direct
15 Jul, 2026	Loic A Vincent	Chief Scientific Officer	Acquired A	7,500	$0.00	$0	25,797	Direct
02 Jul, 2026	Jean Francois Formela	Director	Disposed S	85,955	$14.03	$1.21Mn	707,373	Indirect
02 Jul, 2026	Jean Francois Formela	Director	Disposed S	14,745	$14.03	$206.87K	154,811	Indirect

Showing 1 to 20 of 2,331 transactions