Korro Bio, Inc. (KRRO)

Korro Bio experienced significant selling activity recently, with thirty-two transactions totaling over three million dollars. Major shareholders and executives, including Jean Francois Formela, executed planned divestments. These moves follow an August results financiers beat. Current stock valuations remain near fifty-two-week lows, reflecting ongoing market pressure despite positive operational performance metrics.
Ticker: KRRO Exchange: NAS


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Insider trades have triggered activity signals for Korro Bio, Inc.. Upgrade to see score, net flow, insiders and the full signal context.

Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
360.27
Quantity 38,543 +25.8%
Value US$2,267,295
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
163.30
Quantity 40,692 +47.8%
Value US$2,679,799
Transaction date
Proposed sale
Price
13.81
Quantity 31,888
Value US$440,373
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.99
Quantity 1,750 -1.2%
Value US$24,482
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.99
Quantity 8,450 -1.2%
Value US$118,216
1.4
Dolan Oliver Senior Vice President, Finance Officer
Transaction date
Planned sale
Price
13.72
Quantity 5 -0.0%
Value US$69
Transaction date
Proposed sale
Price
13.06
Quantity 8,450
Value US$110,357
1.4
Dolan Oliver Officer Officer
Transaction date
Proposed sale
Price
13.72
Quantity 5
Value US$69
1.4
Dolan Oliver Senior Vice President, Finance Officer
Transaction date
Planned sale
Price
13.60
Quantity 6 -0.0%
Value US$82
1.4
Dolan Oliver Senior Vice President, Finance Officer
Transaction date
Planned sale
Price
13.60
Quantity 6 -0.0%
Value US$82
1.4
Dolan Oliver Officer Officer
Transaction date
Proposed sale
Price
13.60
Quantity 6
Value US$82
1.4
Dolan Oliver Senior Vice President, Finance Officer
Transaction date
Planned sale
Price
13.51
Quantity 7,347 -31.1%
Value US$99,286
1.4
Dolan Oliver Senior Vice President, Finance Officer
Transaction date
Planned sale
Price
13.51
Quantity 7,347 -31.1%
Value US$99,286
1.4
Dolan Oliver Officer Officer
Transaction date
Proposed sale
Price
13.51
Quantity 7,347
Value US$99,286
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.96
Quantity 51 -0.0%
Value US$712
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.96
Quantity 249 -0.0%
Value US$3,476
Transaction date
Proposed sale
Price
13.73
Quantity 249
Value US$3,419
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.00
Quantity 4,884 -3.3%
Value US$68,376
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.00
Quantity 23,584 -3.3%
Value US$330,176
Transaction date
Proposed sale
Price
13.22
Quantity 23,584
Value US$311,780
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.96
Quantity 368 -0.3%
Value US$5,137
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.96
Quantity 1,775 -0.3%
Value US$24,779
Transaction date
Proposed sale
Price
13.49
Quantity 1,775
Value US$23,945
1.9
Aiyar Ram President and CEO Executive Director
Transaction date
Sale
Price
10.84
Quantity 5,802 -7.8%
Value US$62,917
1.9
Aiyar Ram Officer; Director Executive Director
Transaction date
Proposed sale
Price
114.26
Quantity 5,802
Value US$662,917
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.96
Quantity 8,506 -5.5%
Value US$118,744
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.96
Quantity 817 -0.1%
Value US$11,405
Transaction date
Proposed sale
Price
14.00
Quantity 817
Value US$11,438
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.03
Quantity 14,745 -8.7%
Value US$206,872
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.03
Quantity 85,955 -10.8%
Value US$1,205,949
Transaction date
Proposed sale
Price
13.65
Quantity 85,955
Value US$1,173,286
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.98
Quantity 114 -0.1%
Value US$1,708
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.60
Quantity 6,979 -4.0%
Value US$101,893
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.98
Quantity 666 -0.1%
Value US$9,977
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.60
Quantity 40,679 -4.9%
Value US$593,913
Transaction date
Proposed sale
Price
13.71
Quantity 41,345
Value US$566,840
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.25
Quantity 17,426 -9.0%
Value US$248,320
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
14.25
Quantity 101,579 -10.8%
Value US$1,447,501
Transaction date
Proposed sale
Price
13.90
Quantity 101,579
Value US$1,411,948
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.95
Quantity 580 -0.3%
Value US$8,091
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.95
Quantity 3,382 -0.4%
Value US$47,179
Transaction date
Proposed sale
Price
12.99
Quantity 21,339
Value US$277,194
1.4
Chappell Todd Chief Operating Officer Officer
Transaction date
Sale
Price
10.83
Quantity 3,168 -15.7%
Value US$34,309
1.4
Chappell Todd Chief Operating Officer Officer
Transaction date
Sale
Price
10.83
Quantity 3,168 -15.7%
Value US$34,309
1.4
Vincent Loic A Chief Scientific Officer Officer
Transaction date
Sale
Price
10.83
Quantity 3,418 -15.7%
Value US$37,017
1.4
Cerio Jeffrey General Counsel Officer
Transaction date
Sale
Price
10.83
Quantity 6,609 -15.8%
Value US$71,575
1.4
Dolan Oliver Senior Vice President, Finance Officer
Transaction date
Sale
Price
10.83
Quantity 3,383 -15.7%
Value US$36,638
1.4
Vincent Loic A Officer Officer
Transaction date
Proposed sale
Price
10.83
Quantity 3,418
Value US$37,017
1.4
Dolan Oliver Officer Officer
Transaction date
Proposed sale
Price
10.83
Quantity 3,383
Value US$36,638
1.4
Cerio Jeffrey Officer Officer
Transaction date
Proposed sale
Price
10.83
Quantity 6,609
Value US$71,576
1.4
Chappell Todd Officer Officer
Transaction date
Proposed sale
Price
10.83
Quantity 3,168
Value US$34,310
1.9
Aiyar Ram President and CEO Executive Director
Transaction date
Sale
Price
12.98
Quantity 15,152 -16.8%
Value US$196,673
1.9
Aiyar Ram Officer Officer
Transaction date
Proposed sale
Price
12.98
Quantity 15,152
Value US$196,676
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.95
Quantity 419 -0.2%
Value US$5,845
1.5
FORMELA JEAN FRANCOIS Non-Executive Director
Transaction date
Planned sale
Price
13.95
Quantity 2,441 -0.3%
Value US$34,052
2.8
Makhzoumi Mohamad Large shareholder
Transaction date
Purchase
Price
11.11
Quantity 207,100 +19.0%
Value US$2,300,881
3.3
Mathers Edward T Large shareholder
Transaction date
Purchase
Price
11.11
Quantity 207,100 +19.0%
Value US$2,300,881
3.3
Yang Rick Large shareholder
Transaction date
Purchase
Price
11.11
Quantity 207,100 +19.0%
Value US$2,300,881
2.7
Florence Anthony A. Jr. Large shareholder
Transaction date
Purchase
Price
11.11
Quantity 207,100 +19.0%
Value US$2,300,881
3.6
Chang Carmen Large shareholder
Transaction date
Purchase
Price
11.11
Quantity 207,100 +19.0%
Value US$2,300,881
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-09-15 2026-09-14 PlS Planned sale Non-Executive Director
38,543 +25.8%
360.27
US$2,267,295
38,543 +25.8% 360.27 US$2,267,295
2026-09-15 2026-09-14 PlS Planned sale Non-Executive Director
40,692 +47.8%
163.30
US$2,679,799
40,692 +47.8% 163.30 US$2,679,799
2026-09-14 2026-09-14 PrS Proposed sale

Shareholder

51,605
418.39
US$2,093,453
51,605 418.39 US$2,093,453
2026-09-14 2026-09-14 PrS Proposed sale

Shareholder

31,888
13.81
US$440,373
31,888 13.81 US$440,373
2026-09-15 2026-09-11 PlS Planned sale Non-Executive Director
1,750 -1.2%
13.99
US$24,482
1,750 -1.2% 13.99 US$24,482
2026-09-15 2026-09-11 PlS Planned sale Non-Executive Director
8,450 -1.2%
13.99
US$118,216
8,450 -1.2% 13.99 US$118,216
2026-09-14 2026-09-11 PlS Planned sale

Senior Vice President, Finance

Officer
5 -0.0%
13.72
US$69
5 -0.0% 13.72 US$69
2026-09-11 2026-09-11 PrS Proposed sale

Shareholder

8,450
13.06
US$110,357
8,450 13.06 US$110,357
2026-09-11 2026-09-11 PrS Proposed sale

Shareholder

1,750
13.06
US$22,855
1,750 13.06 US$22,855
2026-09-11 2026-09-11 PrS Proposed sale

Officer

Officer
5
13.72
US$69
5 13.72 US$69
2026-09-10 2026-09-09 PlS Planned sale

Senior Vice President, Finance

Officer
6 -0.0%
13.60
US$82
6 -0.0% 13.60 US$82
2026-09-10 2026-09-09 PlS Planned sale

Senior Vice President, Finance

Officer
6 -0.0%
13.60
US$82
6 -0.0% 13.60 US$82
2026-09-09 2026-09-09 PrS Proposed sale

Officer

Officer
6
13.60
US$82
6 13.60 US$82
2026-09-10 2026-09-08 PlS Planned sale

Senior Vice President, Finance

Officer
7,347 -31.1%
13.51
US$99,286
7,347 -31.1% 13.51 US$99,286
2026-09-10 2026-09-08 PlS Planned sale

Senior Vice President, Finance

Officer
7,347 -31.1%
13.51
US$99,286
7,347 -31.1% 13.51 US$99,286
2026-09-08 2026-09-08 PrS Proposed sale

Officer

Officer
7,347
13.51
US$99,286
7,347 13.51 US$99,286
2026-08-28 2026-08-26 PlS Planned sale Non-Executive Director
51 -0.0%
13.96
US$712
51 -0.0% 13.96 US$712
2026-08-28 2026-08-26 PlS Planned sale Non-Executive Director
249 -0.0%
13.96
US$3,476
249 -0.0% 13.96 US$3,476
2026-08-26 2026-08-26 PrS Proposed sale

Shareholder

249
13.73
US$3,419
249 13.73 US$3,419
2026-08-26 2026-08-26 PrS Proposed sale

Shareholder

51
13.73
US$700
51 13.73 US$700
2026-08-21 2026-08-19 PlS Planned sale Non-Executive Director
4,884 -3.3%
14.00
US$68,376
4,884 -3.3% 14.00 US$68,376
2026-08-21 2026-08-19 PlS Planned sale Non-Executive Director
23,584 -3.3%
14.00
US$330,176
23,584 -3.3% 14.00 US$330,176
2026-08-19 2026-08-19 PrS Proposed sale

Shareholder

4,884
13.22
US$64,566
4,884 13.22 US$64,566
2026-08-19 2026-08-19 PrS Proposed sale

Shareholder

23,584
13.22
US$311,780
23,584 13.22 US$311,780
2026-08-13 2026-08-11 PlS Planned sale Non-Executive Director
368 -0.3%
13.96
US$5,137
368 -0.3% 13.96 US$5,137
2026-08-13 2026-08-11 PlS Planned sale Non-Executive Director
1,775 -0.3%
13.96
US$24,779
1,775 -0.3% 13.96 US$24,779
2026-08-11 2026-08-11 PrS Proposed sale

Shareholder

1,775
13.49
US$23,945
1,775 13.49 US$23,945
2026-08-11 2026-08-11 PrS Proposed sale

Shareholder

368
13.49
US$4,964
368 13.49 US$4,964
2026-08-13 2026-08-10 B Purchase Large shareholder
1,462 +0.1%
13.19
US$19,279
1,462 +0.1% 13.19 US$19,279
2026-08-13 2026-08-06 B Purchase Large shareholder
5,222 +0.3%
11.40
US$59,530
5,222 +0.3% 11.40 US$59,530
2026-08-05 2026-08-04 S Sale

President and CEO

Executive Director
5,802 -7.8%
10.84
US$62,917
5,802 -7.8% 10.84 US$62,917
2026-08-04 2026-08-04 PrS Proposed sale

Officer; Director

Executive Director
5,802
114.26
US$662,917
5,802 114.26 US$662,917
2026-07-07 2026-07-06 PlS Planned sale Non-Executive Director
8,506 -5.5%
13.96
US$118,744
8,506 -5.5% 13.96 US$118,744
2026-07-07 2026-07-06 PlS Planned sale Non-Executive Director
817 -0.1%
13.96
US$11,405
817 -0.1% 13.96 US$11,405
2026-07-06 2026-07-06 PrS Proposed sale

Shareholder

8,506
14.00
US$119,084
8,506 14.00 US$119,084
2026-07-06 2026-07-06 PrS Proposed sale

Shareholder

817
14.00
US$11,438
817 14.00 US$11,438
2026-07-07 2026-07-02 PlS Planned sale Non-Executive Director
14,745 -8.7%
14.03
US$206,872
14,745 -8.7% 14.03 US$206,872
2026-07-07 2026-07-02 PlS Planned sale Non-Executive Director
85,955 -10.8%
14.03
US$1,205,949
85,955 -10.8% 14.03 US$1,205,949
2026-07-02 2026-07-02 PrS Proposed sale

Shareholder

14,745
13.65
US$201,269
14,745 13.65 US$201,269
2026-07-02 2026-07-02 PrS Proposed sale

Shareholder

85,955
13.65
US$1,173,286
85,955 13.65 US$1,173,286
2026-06-24 2026-06-24 PlS Planned sale Non-Executive Director
114 -0.1%
14.98
US$1,708
114 -0.1% 14.98 US$1,708
2026-06-24 2026-06-24 PlS Planned sale Non-Executive Director
6,979 -4.0%
14.60
US$101,893
6,979 -4.0% 14.60 US$101,893
2026-06-24 2026-06-24 PlS Planned sale Non-Executive Director
666 -0.1%
14.98
US$9,977
666 -0.1% 14.98 US$9,977
2026-06-24 2026-06-24 PlS Planned sale Non-Executive Director
40,679 -4.9%
14.60
US$593,913
40,679 -4.9% 14.60 US$593,913
2026-06-24 2026-06-24 PrS Proposed sale

Shareholder

41,345
13.71
US$566,840
41,345 13.71 US$566,840
2026-06-24 2026-06-24 PrS Proposed sale

Shareholder

7,093
13.71
US$97,245
7,093 13.71 US$97,245
2026-06-24 2026-06-23 PlS Planned sale Non-Executive Director
17,426 -9.0%
14.25
US$248,320
17,426 -9.0% 14.25 US$248,320
2026-06-24 2026-06-23 PlS Planned sale Non-Executive Director
101,579 -10.8%
14.25
US$1,447,501
101,579 -10.8% 14.25 US$1,447,501
2026-06-23 2026-06-23 PrS Proposed sale

Shareholder

17,426
13.90
US$242,221
17,426 13.90 US$242,221
2026-06-23 2026-06-23 PrS Proposed sale

Shareholder

101,579
13.90
US$1,411,948
101,579 13.90 US$1,411,948
2026-06-24 2026-06-22 PlS Planned sale Non-Executive Director
580 -0.3%
13.95
US$8,091
580 -0.3% 13.95 US$8,091
2026-06-24 2026-06-22 PlS Planned sale Non-Executive Director
3,382 -0.4%
13.95
US$47,179
3,382 -0.4% 13.95 US$47,179
2026-06-22 2026-06-22 PrS Proposed sale

Shareholder

3,661
12.99
US$47,556
3,661 12.99 US$47,556
2026-06-22 2026-06-22 PrS Proposed sale

Shareholder

3,661
12.99
US$47,556
3,661 12.99 US$47,556
2026-06-22 2026-06-22 PrS Proposed sale

Shareholder

21,339
12.99
US$277,194
21,339 12.99 US$277,194
2026-06-17 2026-06-16 S Sale

Chief Operating Officer

Officer
3,168 -15.7%
10.83
US$34,309
3,168 -15.7% 10.83 US$34,309
2026-06-17 2026-06-16 S Sale

Chief Operating Officer

Officer
3,168 -15.7%
10.83
US$34,309
3,168 -15.7% 10.83 US$34,309
2026-06-17 2026-06-16 S Sale

Chief Scientific Officer

Officer
3,418 -15.7%
10.83
US$37,017
3,418 -15.7% 10.83 US$37,017
2026-06-17 2026-06-16 S Sale

General Counsel

Officer
6,609 -15.8%
10.83
US$71,575
6,609 -15.8% 10.83 US$71,575
2026-06-17 2026-06-16 S Sale

Senior Vice President, Finance

Officer
3,383 -15.7%
10.83
US$36,638
3,383 -15.7% 10.83 US$36,638
2026-06-16 2026-06-16 PrS Proposed sale

Officer

Officer
3,418
10.83
US$37,017
3,418 10.83 US$37,017
2026-06-16 2026-06-16 PrS Proposed sale

Officer

Officer
3,383
10.83
US$36,638
3,383 10.83 US$36,638
2026-06-16 2026-06-16 PrS Proposed sale

Officer

Officer
6,609
10.83
US$71,576
6,609 10.83 US$71,576
2026-06-16 2026-06-16 PrS Proposed sale

Officer

Officer
3,168
10.83
US$34,310
3,168 10.83 US$34,310
2026-06-02 2026-05-29 S Sale

President and CEO

Executive Director
15,152 -16.8%
12.98
US$196,673
15,152 -16.8% 12.98 US$196,673
2026-05-29 2026-05-29 PrS Proposed sale

Officer

Officer
15,152
12.98
US$196,676
15,152 12.98 US$196,676
2026-06-01 2026-05-28 PlS Planned sale Non-Executive Director
419 -0.2%
13.95
US$5,845
419 -0.2% 13.95 US$5,845
2026-06-01 2026-05-28 PlS Planned sale Non-Executive Director
2,441 -0.3%
13.95
US$34,052
2,441 -0.3% 13.95 US$34,052
2026-04-02 2026-03-31 B Purchase Large shareholder
520 +0.0%
10.60
US$5,512
520 +0.0% 10.60 US$5,512
2026-03-12 2026-03-10 B Purchase Large shareholder
207,100 +19.0%
11.11
US$2,300,881
207,100 +19.0% 11.11 US$2,300,881
2026-03-12 2026-03-10 B Purchase Large shareholder
207,100 +19.0%
11.11
US$2,300,881
207,100 +19.0% 11.11 US$2,300,881
2026-03-12 2026-03-10 B Purchase Large shareholder
207,100 +19.0%
11.11
US$2,300,881
207,100 +19.0% 11.11 US$2,300,881
2026-03-12 2026-03-10 B Purchase Large shareholder
207,100 +19.0%
11.11
US$2,300,881
207,100 +19.0% 11.11 US$2,300,881
2026-03-12 2026-03-10 B Purchase Large shareholder
207,100 +19.0%
11.11
US$2,300,881
207,100 +19.0% 11.11 US$2,300,881
2026-03-12 2026-03-10 B Purchase Large shareholder
207,100 +19.0%
11.11
US$2,300,881
207,100 +19.0% 11.11 US$2,300,881