Korro Bio Inc. Insider Trading

KRRO

Last 12 months

Insiders sold $5.7M and bought nothing on the open market.

92% of the selling was scheduled in advance under 10b5-1 plans. President and CEO Ram Aiyar sold 197K on May 29, 16% of their stake, outside a plan. The last open-market buy by an executive or director was in May 2021.

Net open-market

−$5.7M

0 buys · 15 sales

Under a 10b5-1 plan

92%

of the value sold

Insiders who bought / sold

0 / 6

executives and directors

Last open-market buy

May 2021

May 17, 2021

Get an email when KRRO's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 22 – 26	Lynx1 Capital Management LP Large holder	Bought 4 parts	79,809	$11.09 average	885K	5.2%	Form 4
Sep 11 – 14	Jean Francois Formela Director	Sold10b5-1 plan 4 parts	48,690	$14.09 average	686K	27%	Form 4
Sep 11	Oliver Dolan Senior Vice President, Finance	Sold10b5-1 plan	5	$13.72	$69	<0.1%	Form 4
Sep 8 – 9	Oliver Dolan Senior Vice President, Finance	Sold10b5-1 plan 2 parts	7,353	$13.51 average	99K	31%	Form 4
Aug 26	Jean Francois Formela Director	Sold10b5-1 plan 2 parts	300	$13.96 average	4K	0.2%	Form 4
Aug 19	Jean Francois Formela Director	Sold10b5-1 plan 2 parts	28,468	$14.00 average	399K	17%	Form 4
Aug 11	Jean Francois Formela Director	Sold10b5-1 plan 2 parts	2,143	$13.96 average	30K	1.4%	Form 4
Aug 6 – 10	Lynx1 Capital Management LP Large holder	Bought 2 parts	6,684	$11.79 average	79K	0.4%	Form 4
Aug 4	Ram Aiyar President and CEO	SoldNo plan	5,802	$10.84	63K	7.3%	Form 4
Jul 2 – 6	Jean Francois Formela Director	Sold10b5-1 plan 4 parts	110,023	$14.02 average	$1.54M	43%	Form 4
Jun 22 – 24	Jean Francois Formela Director	Sold10b5-1 plan 8 parts	171,405	$14.34 average	$2.46M	50%	Form 4
Jun 16	Todd Chappell Chief Operating Officer	SoldNo plan	3,168	$10.83	34K	16%	Form 4
Jun 16	Loic A Vincent Chief Scientific Officer	SoldNo plan	3,418	$10.83	37K	16%	Form 4
Jun 16	Jeffrey Cerio General Counsel	SoldNo plan	6,609	$10.83	72K	16%	Form 4
Jun 16	Oliver Dolan Senior Vice President, Finance	SoldNo plan	3,383	$10.83	37K	16%	Form 4
May 29	Ram Aiyar President and CEO	SoldNo plan	15,152	$12.98	197K	16%	Form 4
May 28	Jean Francois Formela Director	Sold10b5-1 plan 2 parts	2,860	$13.95 average	40K	1.4%	Form 4
Mar 31	Weston Nichols Large holder	Bought	520	$10.60	6K	<0.1%	Form 4
Mar 10	Rick Yang Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Scott D Sandell Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	New Enterprise Associates 17, L.p. Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Carmen Chang Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Forest Baskett Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Edward T Mathers Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Paul Edward Walker Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Mohamad Makhzoumi Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Mar 10	Anthony A. Florence Jr. Large holder	Bought	207,100	$11.11	$2.3M	19%	Form 4
Nov 11, 2024	Vineet Agarwal Chief Financial Officer	Sold10b5-1 plan	800	$70.00	56K	100%	Form 4

Oct 22 – 26
Lynx1 Capital Management LP
Large holder · bought 79,809 at avg $11.09
885K
5.2% of stake
Sep 11 – 1410b5-1 plan
Jean Francois Formela
Director · sold 48,690 at avg $14.09
686K
27% of stake
Sep 1110b5-1 plan
Oliver Dolan
Senior Vice President, Finance · sold 5 at $13.72
$69
<0.1% of stake
Sep 8 – 910b5-1 plan
Oliver Dolan
Senior Vice President, Finance · sold 7,353 at avg $13.51
99K
31% of stake
Aug 2610b5-1 plan
Jean Francois Formela
Director · sold 300 at avg $13.96
4K
0.2% of stake
Aug 1910b5-1 plan
Jean Francois Formela
Director · sold 28,468 at avg $14.00
399K
17% of stake
Aug 1110b5-1 plan
Jean Francois Formela
Director · sold 2,143 at avg $13.96
30K
1.4% of stake
Aug 6 – 10
Lynx1 Capital Management LP
Large holder · bought 6,684 at avg $11.79
79K
0.4% of stake
Aug 4No plan
Ram Aiyar
President and CEO · sold 5,802 at $10.84
63K
7.3% of stake
Jul 2 – 610b5-1 plan
Jean Francois Formela
Director · sold 110,023 at avg $14.02
$1.54M
43% of stake
Jun 22 – 2410b5-1 plan
Jean Francois Formela
Director · sold 171,405 at avg $14.34
$2.46M
50% of stake
Jun 16No plan
Todd Chappell
Chief Operating Officer · sold 3,168 at $10.83
34K
16% of stake
Jun 16No plan
Loic A Vincent
Chief Scientific Officer · sold 3,418 at $10.83
37K
16% of stake
Jun 16No plan
Jeffrey Cerio
General Counsel · sold 6,609 at $10.83
72K
16% of stake
Jun 16No plan
Oliver Dolan
Senior Vice President, Finance · sold 3,383 at $10.83
37K
16% of stake
May 29No plan
Ram Aiyar
President and CEO · sold 15,152 at $12.98
197K
16% of stake
May 2810b5-1 plan
Jean Francois Formela
Director · sold 2,860 at avg $13.95
40K
1.4% of stake
Mar 31
Weston Nichols
Large holder · bought 520 at $10.60
6K
<0.1% of stake
Mar 10
Rick Yang
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Scott D Sandell
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
New Enterprise Associates 17, L.p.
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Carmen Chang
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Forest Baskett
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Edward T Mathers
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Paul Edward Walker
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Mohamad Makhzoumi
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Mar 10
Anthony A. Florence Jr.
Large holder · bought 207,100 at $11.11
$2.3M
19% of stake
Nov 11, 202410b5-1 plan
Vineet Agarwal
Chief Financial Officer · sold 800 at $70.00
56K
100% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch KRRO, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

KRRO is in 4 US ETFs. The largest of them, with KRRO's weight in each:

Spot a number that looks wrong? Check it in KRRO's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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