KRRO

Korro Bio, Inc.

Insider trading activity for Korro Bio, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$2.7M

net selling

Bought(2 · 1 insiders): $78.8K
Sold(18 · 3 insiders): $2.8M

Past 6 months

-$5.6M

net selling

Bought(3 · 1 insiders): $84.3K
Sold(33 · 6 insiders): $5.7M

Past 12 months

+$15.1M

net buying

Bought(12 · 10 insiders): $20.8M
Sold(33 · 6 insiders): $5.7M

Transaction history

The 83 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 14	Formela Jean Francois	Director	SSELL◷	6,602	$14.12	$93.2K	-4.7%	Open the original filing on SEC.gov
Sep 14	Formela Jean Francois	Director	SSELL◷	31,888	$14.12	$450.3K	-4.7%	Open the original filing on SEC.gov
Sep 11	Formela Jean Francois	Director	SSELL◷	1,750	$13.99	$24.5K	-1.2%	Open the original filing on SEC.gov
Sep 11	Formela Jean Francois	Director	SSELL◷	8,450	$13.99	$118.2K	-1.2%	Open the original filing on SEC.gov
Sep 11	Dolan Oliver	Senior Vice President,…	SSELL◷	5	$13.72	$69	<0.1%	Open the original filing on SEC.gov
Sep 9	Dolan Oliver	Senior Vice President,…	SSELL◷	6	$13.60	$82	<0.1%	Open the original filing on SEC.gov
Sep 8	Dolan Oliver	Senior Vice President,…	SSELL◷	7,347	$13.51	$99.3K	-31.1%	Open the original filing on SEC.gov
Aug 26	Formela Jean Francois	Director	SSELL◷	51	$13.96	$712	<0.1%	Open the original filing on SEC.gov
Aug 26	Formela Jean Francois	Director	SSELL◷	249	$13.96	$3.5K	<0.1%	Open the original filing on SEC.gov
Aug 19	Formela Jean Francois	Director	SSELL◷	4,884	$14.00	$68.4K	-3.4%	Open the original filing on SEC.gov
Aug 19	Formela Jean Francois	Director	SSELL◷	23,584	$14.00	$330.2K	-3.4%	Open the original filing on SEC.gov
Aug 11	Formela Jean Francois	Director	SSELL◷	368	$13.96	$5.1K	-0.3%	Open the original filing on SEC.gov
Aug 11	Formela Jean Francois	Director	SSELL◷	1,775	$13.96	$24.8K	-0.3%	Open the original filing on SEC.gov
Aug 10	Lynx1 Capital Management…	10% Owner	PBUY	1,462	$13.19	$19.3K	+<0.1%	Open the original filing on SEC.gov
Aug 6	Lynx1 Capital Management…	10% Owner	PBUY▲	5,222	$11.40	$59.5K	+0.3%	Open the original filing on SEC.gov
Aug 4	Aiyar Ram	President and CEO	SSELL	5,802	$10.84	$62.9K	-7.8%	Open the original filing on SEC.gov
Jul 15	Vincent Loic A	Chief Scientific Officer	AGRANT	7,500	—	—	+41.0%	Open the original filing on SEC.gov
Jul 15	Dolan Oliver	Senior Vice President,…	AGRANT	5,500	—	—	+30.4%	Open the original filing on SEC.gov
Jul 15	Chappell Todd	Chief Operating Officer	AGRANT	7,500	—	—	+44.2%	Open the original filing on SEC.gov
Jul 15	Cerio Jeffrey	General Counsel	AGRANT	6,500	—	—	+18.4%	Open the original filing on SEC.gov
Jul 6	Formela Jean Francois	Director	SSELL◷	8,506	$13.96	$118.7K	-5.5%	Open the original filing on SEC.gov
Jul 6	Formela Jean Francois	Director	SSELL◷	817	$13.96	$11.4K	-0.1%	Open the original filing on SEC.gov
Jul 2	Formela Jean Francois	Director	SSELL◷	14,745	$14.03	$206.9K	-8.7%	Open the original filing on SEC.gov
Jul 2	Formela Jean Francois	Director	SSELL◷	85,955	$14.03	$1.2M	-10.8%	Open the original filing on SEC.gov
Jun 24	Formela Jean Francois	Director	SSELL◷	114	$14.98	$1.7K	<0.1%	Open the original filing on SEC.gov
Jun 24	Formela Jean Francois	Director	SSELL◷	6,979	$14.60	$101.9K	-4.0%	Open the original filing on SEC.gov
Jun 24	Formela Jean Francois	Director	SSELL◷	666	$14.98	$10K	<0.1%	Open the original filing on SEC.gov
Jun 24	Formela Jean Francois	Director	SSELL◷	40,679	$14.60	$593.9K	-4.9%	Open the original filing on SEC.gov
Jun 23	Formela Jean Francois	Director	SSELL◷	17,426	$14.25	$248.3K	-9.0%	Open the original filing on SEC.gov
Jun 23	Formela Jean Francois	Director	SSELL◷	101,579	$14.25	$1.4M	-10.8%	Open the original filing on SEC.gov
Jun 22	Formela Jean Francois	Director	SSELL◷	580	$13.95	$8.1K	-0.3%	Open the original filing on SEC.gov
Jun 22	Formela Jean Francois	Director	SSELL◷	3,382	$13.95	$47.2K	-0.4%	Open the original filing on SEC.gov
Jun 16	Vincent Loic A	Chief Scientific Officer	SSELL	3,418	$10.83	$37K	-15.7%	Open the original filing on SEC.gov
Jun 16	Dolan Oliver	Senior Vice President,…	SSELL	3,383	$10.83	$36.6K	-15.8%	Open the original filing on SEC.gov
Jun 16	Chappell Todd	Chief Operating Officer	SSELL	3,168	$10.83	$34.3K	-15.7%	Open the original filing on SEC.gov
Jun 16	Cerio Jeffrey	General Counsel	SSELL	6,609	$10.83	$71.6K	-15.8%	Open the original filing on SEC.gov
Jun 10	Meyers Rachel	Director	AGRANT◆	14,677	—	—	—	Open the original filing on SEC.gov
Jun 10	Pearson Timothy R	Director	AGRANT◆	14,677	—	—	—	Open the original filing on SEC.gov
Jun 10	Knobil Katharine	Director	AGRANT◆	14,677	—	—	—	Open the original filing on SEC.gov
Jun 10	Formela Jean Francois	Director	AGRANT◆	14,677	—	—	—	Open the original filing on SEC.gov
Jun 10	Bermingham Nessan	Director	AGRANT◆	14,677	—	—	—	Open the original filing on SEC.gov
Jun 10	Behbahani Ali	Director	AGRANT◆	14,677	—	—	—	Open the original filing on SEC.gov
May 29	Aiyar Ram	President and CEO	SSELL	15,152	$12.98	$196.7K	-16.8%	Open the original filing on SEC.gov
May 28	Formela Jean Francois	Director	SSELL◷	419	$13.95	$5.8K	-0.2%	Open the original filing on SEC.gov
May 28	Formela Jean Francois	Director	SSELL◷	2,441	$13.95	$34.1K	-0.3%	Open the original filing on SEC.gov
May 26	Aiyar Ram	President and CEO	AGRANT	50,000	$12.33	$616.5K	+125.0%	Open the original filing on SEC.gov
Mar 31	Lynx1 Capital Management…	10% Owner	PBUY★	520	$10.60	$5.5K	+<0.1%	Open the original filing on SEC.gov
Mar 10	Yang Rick	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Yang Rick	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Sandell Scott D	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Sandell Scott D	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	New Enterprise Associate…	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	New Enterprise Associate…	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Mathers Edward T	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Mathers Edward T	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Walker Paul Edward	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Walker Paul Edward	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Makhzoumi Mohamad	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Makhzoumi Mohamad	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Florence Anthony A. Jr.	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Florence Anthony A. Jr.	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Chang Carmen	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Chang Carmen	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Behbahani Ali	Director, 10% Owner	AGRANT◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Behbahani Ali	Director, 10% Owner	AGRANT	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Mar 10	Baskett Forest	10% Owner	PDBUY◆	242,945	$11.11	$2.7M	—	Open the original filing on SEC.gov
Mar 10	Baskett Forest	10% Owner	PBUY★	207,100	$11.11	$2.3M	+19.0%	Open the original filing on SEC.gov
Feb 2	Vincent Loic A	Chief Scientific Officer	AGRANT◆	35,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Dolan Oliver	Senior Vice President,…	AGRANT◆	15,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Chappell Todd	Chief Operating Officer	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Cerio Jeffrey	General Counsel	AGRANT◆	23,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Aiyar Ram	President and CEO	AGRANT◆	80,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Aiyar Ram	President and CEO	AGRANT	40,000	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Vincent Loic A	Chief Scientific Officer	AGRANT	21,715	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Dolan Oliver	Senior Vice President,…	AGRANT	21,482	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Chappell Todd	Chief Operating Officer	AGRANT	20,132	—	—	—	Open the original filing on SEC.gov
Dec 15, 2025	Cerio Jeffrey	General Counsel	AGRANT	41,902	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Meyers Rachel	Director	AGRANT◆	6,010	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Pearson Timothy R	Director	AGRANT◆	6,010	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Knobil Katharine	Director	AGRANT◆	6,010	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Formela Jean Francois	Director	AGRANT◆	6,010	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Bermingham Nessan	Director	AGRANT◆	6,010	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Behbahani Ali	Director, 10% Owner	AGRANT◆	6,010	—	—	—	Open the original filing on SEC.gov

SSELL◷$93.2K

Formela Jean Francois · DirectorSep 14

6,602 sh @ $14.12 · -4.7% own

SSELL◷$450.3K

Formela Jean Francois · DirectorSep 14

31,888 sh @ $14.12 · -4.7% own

SSELL◷$24.5K

Formela Jean Francois · DirectorSep 11

1,750 sh @ $13.99 · -1.2% own

SSELL◷$118.2K

Formela Jean Francois · DirectorSep 11

8,450 sh @ $13.99 · -1.2% own

SSELL◷$69

Dolan Oliver · Senior Vice…Sep 11

5 sh @ $13.72 · <0.1% own

SSELL◷$82

Dolan Oliver · Senior Vice…Sep 9

6 sh @ $13.60 · <0.1% own

SSELL◷$99.3K

Dolan Oliver · Senior Vice…Sep 8

7,347 sh @ $13.51 · -31.1% own

SSELL◷$712

Formela Jean Francois · DirectorAug 26

51 sh @ $13.96 · <0.1% own

SSELL◷$3.5K

Formela Jean Francois · DirectorAug 26

249 sh @ $13.96 · <0.1% own

SSELL◷$68.4K

Formela Jean Francois · DirectorAug 19

4,884 sh @ $14.00 · -3.4% own

SSELL◷$330.2K

Formela Jean Francois · DirectorAug 19

23,584 sh @ $14.00 · -3.4% own

SSELL◷$5.1K

Formela Jean Francois · DirectorAug 11

368 sh @ $13.96 · -0.3% own

SSELL◷$24.8K

Formela Jean Francois · DirectorAug 11

1,775 sh @ $13.96 · -0.3% own

PBUY$19.3K

Lynx1 Capital Management… · 10% OwnerAug 10

1,462 sh @ $13.19 · +<0.1% own

PBUY▲$59.5K

Lynx1 Capital Management… · 10% OwnerAug 6

5,222 sh @ $11.40 · +0.3% own

SSELL$62.9K

Aiyar Ram · President and CEOAug 4

5,802 sh @ $10.84 · -7.8% own

AGRANT—

Vincent Loic A · Chief Scientific…Jul 15

7,500 sh · +41.0% own

AGRANT—

Dolan Oliver · Senior Vice…Jul 15

5,500 sh · +30.4% own

AGRANT—

Chappell Todd · Chief Operating…Jul 15

7,500 sh · +44.2% own

AGRANT—

Cerio Jeffrey · General CounselJul 15

6,500 sh · +18.4% own

SSELL◷$118.7K

Formela Jean Francois · DirectorJul 6

8,506 sh @ $13.96 · -5.5% own

SSELL◷$11.4K

Formela Jean Francois · DirectorJul 6

817 sh @ $13.96 · -0.1% own

SSELL◷$206.9K

Formela Jean Francois · DirectorJul 2

14,745 sh @ $14.03 · -8.7% own

SSELL◷$1.2M

Formela Jean Francois · DirectorJul 2

85,955 sh @ $14.03 · -10.8% own

SSELL◷$1.7K

Formela Jean Francois · DirectorJun 24

114 sh @ $14.98 · <0.1% own

SSELL◷$101.9K

Formela Jean Francois · DirectorJun 24

6,979 sh @ $14.60 · -4.0% own

SSELL◷$10K

Formela Jean Francois · DirectorJun 24

666 sh @ $14.98 · <0.1% own

SSELL◷$593.9K

Formela Jean Francois · DirectorJun 24

40,679 sh @ $14.60 · -4.9% own

SSELL◷$248.3K

Formela Jean Francois · DirectorJun 23

17,426 sh @ $14.25 · -9.0% own

SSELL◷$1.4M

Formela Jean Francois · DirectorJun 23

101,579 sh @ $14.25 · -10.8% own

SSELL◷$8.1K

Formela Jean Francois · DirectorJun 22

580 sh @ $13.95 · -0.3% own

SSELL◷$47.2K

Formela Jean Francois · DirectorJun 22

3,382 sh @ $13.95 · -0.4% own

SSELL$37K

Vincent Loic A · Chief Scientific…Jun 16

3,418 sh @ $10.83 · -15.7% own

SSELL$36.6K

Dolan Oliver · Senior Vice…Jun 16

3,383 sh @ $10.83 · -15.8% own

SSELL$34.3K

Chappell Todd · Chief Operating…Jun 16

3,168 sh @ $10.83 · -15.7% own

SSELL$71.6K

Cerio Jeffrey · General CounselJun 16

6,609 sh @ $10.83 · -15.8% own

AGRANT◆—

Meyers Rachel · DirectorJun 10

14,677 sh

AGRANT◆—

Pearson Timothy R · DirectorJun 10

14,677 sh

AGRANT◆—

Knobil Katharine · DirectorJun 10

14,677 sh

AGRANT◆—

Formela Jean Francois · DirectorJun 10

14,677 sh

AGRANT◆—

Bermingham Nessan · DirectorJun 10

14,677 sh

AGRANT◆—

Behbahani Ali · DirectorJun 10

14,677 sh

SSELL$196.7K

Aiyar Ram · President and CEOMay 29

15,152 sh @ $12.98 · -16.8% own

SSELL◷$5.8K

Formela Jean Francois · DirectorMay 28

419 sh @ $13.95 · -0.2% own

SSELL◷$34.1K

Formela Jean Francois · DirectorMay 28

2,441 sh @ $13.95 · -0.3% own

AGRANT$616.5K

Aiyar Ram · President and CEOMay 26

50,000 sh @ $12.33 · +125.0% own

PBUY★$5.5K

Lynx1 Capital Management… · 10% OwnerMar 31

520 sh @ $10.60 · +<0.1% own

PDBUY◆$2.7M

Yang Rick · 10% OwnerMar 10

242,945 sh @ $11.11

PBUY★$2.3M

Yang Rick · 10% OwnerMar 10