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Korro Bio, Inc.

KRRO Net buying
CIK 0001703647 #3970 in the set updated 17 Sep 2026
Bought (120 mo)
$36.13M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$25.22M
$5.32M on a plan · $9.50M straight out of an exercise
Sold at will
$10.41M
117 of 274 sales
Net
+$10.91M
+$25.73M against sales at will

By person

33 insiders · 319 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Lucchino David L.
Director
—
$11.62M (98) scheduled
−$11.62M
22,150
0.1504%
$312.76K
—
FORMELA JEAN FRANCOIS
Director
—
$5.16M (24) scheduled
−$5.16M
273,703
1.86%
$3.86M
—
Loose Christopher R.
Chief Scientific Officer
—
$4.59M (60)
−$4.59M
183,650
1.25%
$2.59M
−45.4%
Flynn James E
10% owner
$4.00M (1)
—
+$4.00M
1,231,434
8.36%
$17.39M
—
BASKETT FOREST
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
Chang Carmen
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
Florence Anthony A. Jr.
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
Makhzoumi Mohamad
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
Mathers Edward T
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
New Enterprise Associates 17, L.P. entity
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
SANDELL SCOTT D
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
Walker Paul Edward
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
Yang Rick
10% owner
$3.30M (2)
—
+$3.30M
1,297,893
8.81%
$18.33M
+21.0%
MARCUS JOEL S
Director
$999.99K (1)
$2.32M (14)
−$1.32M
1,318,846
8.96%
$18.62M
+289.9%
Atlas Venture Opportunity Fund II, L.P. entity
10% owner
$999.99K (1)
—
+$999.99K
195,074
1.32%
$2.75M
+10.1%
Agarwal Vineet
Chief Financial Officer
—
$855.53K (12) scheduled
−$855.53K
0
0.0000%
$0.00
—
Aiyar Ram
President and CEO
—
$259.59K (2)
−$259.59K
73,659
0.5002%
$1.04M
—
COHEN MARC A
Director
$250.00K (1)
—
+$250.00K
623,677
4.24%
$8.81M
+760.5%
Dolan Oliver
Senior Vice President, Finance
—
$136.07K (4) scheduled
−$136.07K
16,241
0.1103%
$229.32K
—
Lynx1 Capital Management LP entity
10% owner
$84.32K (3)
—
+$84.32K
1,544,980
10.49%
$21.82M
+0.5%
Cerio Jeffrey
General Counsel
—
$71.58K (1)
−$71.58K
41,793
0.2838%
$590.12K
—
McCubbin Quentin
Chief Manufacturing Officer
$88.50K (1)
$37.44K (6)
+$51.06K
38,340
0.2604%
$541.36K
+472.2%
Vincent Loic A
Chief Scientific Officer
—
$37.02K (1)
−$37.02K
25,797
0.1752%
$364.25K
—
Chappell Todd
Chief Operating Officer
—
$34.31K (1)
−$34.31K
24,464
0.1661%
$345.43K
—
Arnold Wendy S
Chief People Officer
—
$32.36K (6)
−$32.36K
21,186
0.1439%
$299.15K
+684.1%
PFREUNDSCHUH PETER P.
Chief Financial Officer
—
$27.61K (5)
−$27.61K
8,927
0.0606%
$126.05K
+1,098%
LeBel Carl
Chief Development Officer
—
$25.37K (6)
−$25.37K
26,343
0.1789%
$371.96K
+389.4%
Mitrano Richard J.
VP Finance & Operations
$1.50K (1)
$7.54K (34) scheduled
−$6.05K
52,489
0.3564%
$741.14K
+19.1%
Behbahani Ali
Director
—
—
—
1,297,893
8.81%
$18.33M
—
Alexandria Venture Investments, LLC entity
10% owner
—
—
—
956,175
6.49%
$13.50M
—
LANGER ROBERT
Director
—
—
—
240,021
1.63%
$3.39M
−19.2%
BARBERICH TIMOTHY J
Director
—
—
—
182,739
1.24%
$2.58M
+946.2%
Bermingham Nessan
Director
—
—
—
35,114
0.2385%
$495.81K
—

Individual transactions

66
Insider
Date
Role
Action
Shares
Price
Amount
Aiyar Ram
4 Aug 2026
President and CEO
Sell
5,802
$10.84
$62.92K
Dolan Oliver
16 Jun 2026
Senior Vice President, Finance
Sell
3,383
$10.83
$36.64K
Cerio Jeffrey
16 Jun 2026
General Counsel
Sell
6,609
$10.83
$71.58K
Vincent Loic A
16 Jun 2026
Chief Scientific Officer
Sell
3,418
$10.83
$37.02K
Chappell Todd
16 Jun 2026
Chief Operating Officer
Sell
3,168
$10.83
$34.31K
Aiyar Ram
29 May 2026
President and CEO
Sell
15,152
$12.98
$196.67K
Lucchino David L.
22 Nov 2023
Director
Sell
202
$38.82
$7.84K
Lucchino David L.
22 Nov 2023
Director
Sell
614
$37.98
$23.32K
Lucchino David L.
22 Nov 2023
Director
Sell
230
$36.74
$8.45K
Lucchino David L.
22 Nov 2023
Director
Sell
110
$35.99
$3.96K
Lucchino David L.
10 Nov 2023
Director
Sell
34
$46.23
$1.57K
Lucchino David L.
10 Nov 2023
Director
Sell
67
$45.53
$3.05K
Lucchino David L.
10 Nov 2023
Director
Sell
191
$44.01
$8.41K
Lucchino David L.
10 Nov 2023
Director
Sell
225
$43.17
$9.71K
Lucchino David L.
10 Nov 2023
Director
Sell
41
$41.94
$1.72K
Lucchino David L.
10 Nov 2023
Director
Sell
373
$39.59
$14.77K
Lucchino David L.
10 Nov 2023
Director
Sell
37
$37.92
$1.40K
LeBel Carl
6 Jul 2022
Chief Development Officer
Sell
4,421
$1.52
$6.72K
Arnold Wendy S
6 Jul 2022
Chief People Officer
Sell
5,638
$1.52
$8.57K
McCubbin Quentin
6 Jul 2022
Chief Manufacturing Officer
Sell
6,569
$1.52
$9.98K
Loose Christopher R.
6 Jul 2022
Chief Scientific Officer
Sell
4,415
$1.53
$6.75K
Mitrano Richard J.
6 Jul 2022
VP Finance & Operations
Sell
2,184
$1.54
$3.36K
Arnold Wendy S
22 Feb 2022
Chief People Officer
Sell
1,326
$3.53
$4.68K
McCubbin Quentin
22 Feb 2022
Chief Manufacturing Officer
Sell
1,584
$3.53
$5.60K
LeBel Carl
22 Feb 2022
Chief Development Officer
Sell
1,069
$3.53
$3.77K
PFREUNDSCHUH PETER P.
22 Feb 2022
Chief Financial Officer
Sell
1,542
$3.53
$5.44K
Loose Christopher R.
22 Feb 2022
Chief Scientific Officer
Sell
1,069
$3.53
$3.77K
Arnold Wendy S
18 Feb 2022
Chief People Officer
Sell
1,209
$3.87
$4.68K
McCubbin Quentin
18 Feb 2022
Chief Manufacturing Officer
Sell
1,411
$3.87
$5.46K
LeBel Carl
18 Feb 2022
Chief Development Officer
Sell
974
$3.87
$3.77K
PFREUNDSCHUH PETER P.
18 Feb 2022
Chief Financial Officer
Sell
1,404
$3.88
$5.44K
Loose Christopher R.
18 Feb 2022
Chief Scientific Officer
Sell
974
$3.87
$3.77K
Arnold Wendy S
17 Feb 2022
Chief People Officer
Sell
1,118
$4.19
$4.69K
McCubbin Quentin
17 Feb 2022
Chief Manufacturing Officer
Sell
1,303
$4.20
$5.47K
LeBel Carl
17 Feb 2022
Chief Development Officer
Sell
901
$4.19
$3.77K
Loose Christopher R.
17 Feb 2022
Chief Scientific Officer
Sell
900
$4.19
$3.77K
PFREUNDSCHUH PETER P.
17 Feb 2022
Chief Financial Officer
Sell
1,296
$4.20
$5.44K
Arnold Wendy S
16 Feb 2022
Chief People Officer
Sell
1,057
$4.43
$4.68K
McCubbin Quentin
16 Feb 2022
Chief Manufacturing Officer
Sell
1,233
$4.43
$5.46K
LeBel Carl
16 Feb 2022
Chief Development Officer
Sell
831
$4.43
$3.68K
Loose Christopher R.
16 Feb 2022
Chief Scientific Officer
Sell
851
$4.43
$3.77K
PFREUNDSCHUH PETER P.
16 Feb 2022
Chief Financial Officer
Sell
1,229
$4.43
$5.44K
Arnold Wendy S
15 Feb 2022
Chief People Officer
Sell
1,168
$4.33
$5.06K
PFREUNDSCHUH PETER P.
15 Feb 2022
Chief Financial Officer
Sell
1,347
$4.33
$5.83K
Loose Christopher R.
15 Feb 2022
Chief Scientific Officer
Sell
863
$4.33
$3.74K
McCubbin Quentin
15 Feb 2022
Chief Manufacturing Officer
Sell
1,261
$4.33
$5.46K
LeBel Carl
15 Feb 2022
Chief Development Officer
Sell
844
$4.33
$3.66K
Loose Christopher R.
3 Feb 2021
Chief Scientific Officer
Sell
2,000
$47.19
$94.38K
Loose Christopher R.
2 Feb 2021
Chief Scientific Officer
Sell
8,000
$45.02
$360.20K
Loose Christopher R.
27 Jan 2021
Chief Scientific Officer
Sell
8,000
$42.50
$340.00K
MARCUS JOEL S
22 Dec 2020
Director
Sell
10,000
$34.27
$342.74K
MARCUS JOEL S
22 Dec 2020
Director
Sell
1,120
$33.82
$37.88K
MARCUS JOEL S
22 Dec 2020
Director
Sell
7,441
$32.97
$245.34K
MARCUS JOEL S
22 Dec 2020
Director
Sell
1,439
$32.09
$46.18K
MARCUS JOEL S
21 Dec 2020
Director
Sell
10,000
$30.35
$303.52K
MARCUS JOEL S
18 Dec 2020
Director
Sell
8,412
$38.27
$321.91K
MARCUS JOEL S
18 Dec 2020
Director
Sell
4,300
$37.21
$159.99K
MARCUS JOEL S
18 Dec 2020
Director
Sell
2,864
$36.03
$103.19K
MARCUS JOEL S
18 Dec 2020
Director
Sell
1,814
$34.90
$63.31K
MARCUS JOEL S
18 Dec 2020
Director
Sell
2,310
$33.92
$78.36K
Loose Christopher R.
17 Dec 2020
Chief Scientific Officer
Sell
2,000
$42.50
$85.00K
Loose Christopher R.
17 Dec 2020
Chief Scientific Officer
Sell
6,000
$40.00
$240.00K
Loose Christopher R.
16 Dec 2020
Chief Scientific Officer
Sell
4,000
$40.00
$160.00K
Loose Christopher R.
16 Dec 2020
Chief Scientific Officer
Sell
4,000
$37.87
$151.48K
Loose Christopher R.
15 Dec 2020
Chief Scientific Officer
Sell
8,000
$37.28
$298.24K
Loose Christopher R.
14 Dec 2020
Chief Scientific Officer
Sell
8,000
$35.00
$280.00K
Showing 250 of 319 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 297
Amendments (4/A) skipped 7
Filings about a different issuer 0
Unreadable filings 0
Joint filings 6
Sales on a Rule 10b5-1 plan 101
Sales straight out of an exercise 56
Sales at will 117
Transactions with no price 0
Shares from compensation/vesting 7,033,335
Sales filed before the plan box existed 100
History held since 2 Oct 2019