Korro Bio, Inc. (KRRO) Insider Trading
Directors, officers and holders of more than 10% of KRRO report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 113 transactions on file: 6 with code P, 33 with code S and 11 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 26, 2026 | Lynx1 Capital Management LP | 10% Owner | P Purchase | 25,124 | $11.75 | $295,091 |
| Oct 23, 2026 | Lynx1 Capital Management LP | 10% Owner | P Purchase | 2,510 | $12.11 | $30,386 |
| Oct 22, 2026 | Lynx1 Capital Management LP | 10% Owner | P Purchase | 40,000 | $11.04 | $441,464 |
| Oct 22, 2026 | Lynx1 Capital Management LP | 10% Owner | P Purchase | 12,175 | $9.68 | $117,810 |
| Sep 14, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 6,602 | $14.12 | $93,220 |
| Sep 14, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 31,888 | $14.12 | $450,259 |
| Sep 11, 2026 | Dolan Oliver | Senior Vice President, Finance | S Sale | 5 | $13.72 | $69 |
| Sep 11, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 8,450 | $13.99 | $118,216 |
| Sep 11, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 1,750 | $13.99 | $24,483 |
| Sep 9, 2026 | Dolan Oliver | Senior Vice President, Finance | S Sale | 6 | $13.60 | $82 |
| Sep 8, 2026 | Dolan Oliver | Senior Vice President, Finance | S Sale | 7,347 | $13.51 | $99,286 |
| Aug 26, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 249 | $13.96 | $3,476 |
| Aug 26, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 51 | $13.96 | $712 |
| Aug 19, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 23,584 | $14.00 | $330,176 |
| Aug 19, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 4,884 | $14.00 | $68,376 |
| Aug 11, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 368 | $13.96 | $5,137 |
| Aug 11, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 1,775 | $13.96 | $24,779 |
| Aug 10, 2026 | Lynx1 Capital Management LP | 10% Owner | P Purchase | 1,462 | $13.19 | $19,279 |
| Aug 6, 2026 | Lynx1 Capital Management LP | 10% Owner | P Purchase | 5,222 | $11.40 | $59,530 |
| Aug 4, 2026 | Aiyar Ram | President and CEO | S Sale | 5,802 | $10.84 | $62,917 |
| Jul 15, 2026 | Dolan Oliver | Senior Vice President, Finance | A Award | 5,500 | Not measured | Not measured |
| Jul 15, 2026 | Cerio Jeffrey | General Counsel | A Award | 6,500 | Not measured | Not measured |
| Jul 15, 2026 | Vincent Loic A | Chief Scientific Officer | A Award | 7,500 | Not measured | Not measured |
| Jul 15, 2026 | Chappell Todd | Chief Operating Officer | A Award | 7,500 | Not measured | Not measured |
| Jul 6, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 8,506 | $13.96 | $118,744 |
| Jul 6, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 817 | $13.96 | $11,405 |
| Jul 2, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 14,745 | $14.03 | $206,872 |
| Jul 2, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 85,955 | $14.03 | $1,205,949 |
| Jun 24, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 40,679 | $14.60 | $593,913 |
| Jun 24, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 114 | $14.98 | $1,708 |
| Jun 24, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 6,979 | $14.60 | $101,893 |
| Jun 24, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 666 | $14.98 | $9,977 |
| Jun 23, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 17,426 | $14.25 | $248,321 |
| Jun 23, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 101,579 | $14.25 | $1,447,501 |
| Jun 22, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 3,382 | $13.95 | $47,179 |
| Jun 22, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 580 | $13.95 | $8,091 |
| Jun 16, 2026 | Dolan Oliver | Senior Vice President, Finance | S Sale | 3,383 | $10.83 | $36,638 |
| Jun 16, 2026 | Cerio Jeffrey | General Counsel | S Sale | 6,609 | $10.83 | $71,575 |
| Jun 16, 2026 | Vincent Loic A | Chief Scientific Officer | S Sale | 3,418 | $10.83 | $37,017 |
| Jun 16, 2026 | Chappell Todd | Chief Operating Officer | S Sale | 3,168 | $10.83 | $34,309 |
| Jun 10, 2026 | FORMELA JEAN FRANCOIS | Director | A Award | 14,677 | Not measured | Not measured |
| Jun 10, 2026 | Knobil Katharine | Director | A Award | 14,677 | Not measured | Not measured |
| Jun 10, 2026 | Behbahani Ali | Director | A Award | 14,677 | Not measured | Not measured |
| Jun 10, 2026 | Meyers Rachel | Director | A Award | 14,677 | Not measured | Not measured |
| Jun 10, 2026 | Bermingham Nessan | Director | A Award | 14,677 | Not measured | Not measured |
| Jun 10, 2026 | PEARSON TIMOTHY R | Director | A Award | 14,677 | Not measured | Not measured |
| May 29, 2026 | Aiyar Ram | President and CEO | S Sale | 15,152 | $12.98 | $196,673 |
| May 28, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 419 | $13.95 | $5,845 |
| May 28, 2026 | FORMELA JEAN FRANCOIS | Director | S Sale | 2,441 | $13.95 | $34,052 |
| May 26, 2026 | Aiyar Ram | President and CEO | A Award | 50,000 | $12.33 | $616,500 |
The full Form 4 history is on the KRRO company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.