SEC ownership of Korro Bio, Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001703647.

Comparable stake leader

Lynx1 Capital Management LP

Disclosed value leader

Lynx1 Capital Management LP

Comparable rows

50/50

Latest evidence

30 Jun 2026

Top shareholders Insider holders Latest transactions
Public ticker
KRRO on Nasdaq
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
Lynx1 Capital Management LP
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
Lynx1 Capital Management LP
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
30 Jun 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001703647
Issuer location
Cambridge, MA

Ownership snapshot

Top shareholders of Korro Bio, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Lynx1 Capital Management LP
Disclosed value leader
Lynx1 Capital Management LP
Comparable rows
50/50
Latest evidence
30 Jun 2026
13D/G 3/4/5 13F Lead comparable stake: 11% 13D/G row: Lynx1 Capital Management LP Showing 1-8 of 50 holder rows.

Quick read

Lynx1 Capital Management LP leads the comparable SEC ownership view at 11%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Lynx1 Capital Management LP's linked filing trail.
Comparable ownership Top 5
Lynx1 Capital Management LP 11%
Venrock Healthcare Capital Partne... 9.9%
New Enterprise Associates 17, L.P. 9.9%
Nantahala Capital Management, LLC 6.4%
BlackRock, Inc. 5.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Lynx1 Capital Management LP
13D/G 3/4/5 13F
10%+ Owner · Company
13D/G 3/4/5 13F
11%
$18,351,871
1,538,296 shares
 +$9,599,630 31 Mar 2026
Venrock Healthcare Capital Partners III, L.P.
13D/G
13D/G
9.9%
$17,760,012
1,488,685 shares
 $0 10 Mar 2026
New Enterprise Associates 17, L.P.
13D/G 3/4/5
Ali Behbahani · 10%+ Owner
13D/G 3/4/5
9.9%
$17,130,522
1,456,677 shares
 $0 10 Mar 2026
Nantahala Capital Management, LLC
13F 13D/G
Company
13F 13D/G
6.4%
from 13D/G
$7,471,608
660,036 shares
 — 31 Mar 2026
BlackRock, Inc.
13D/G 13F
Company
13D/G 13F
5.2%
$9,853,180
747,546 shares
 $0 30 Jun 2026
CITADEL ADVISORS LLC
13D/G 13F
Company
13D/G 13F
3.9%
$6,163,449
369,733 shares
 $0 31 Dec 2024
Deep Track Capital, LP
13D/G
13D/G
3%
$3,638,575
277,966 shares
 $0 30 Jun 2025
FMR LLC
13F 13D/G
Company
13F 13D/G
0.4%
from 13D/G
$440,348
38,900 shares
 — 31 Mar 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to buying over the last 12 months. Net value: +$16,301,291.

Buys
$20,718,953
Insiders: 11
Sells
$4,417,662
Insiders: 6
Net
+$16,301,291
Shares: +1,548,922
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 1,864,940 Shares: 316,018
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 316,018 $0 $4,417,662 -$4,417,662
3-6 1,864,940 0 $20,718,953 $0 +$20,718,953
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 40 reporting-owner rows connected to Korro Bio, Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
40
Largest Forms 3/4/5 holder
Lynx1 Capital Management LP
Net 12M change
+$16,301,292
Latest report
15 Jul 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Lynx1 Capital Management LP 10%+ Owner $16,305,937 +$5,512 +0.03% Filing P/S 31 Mar 2026
Weston Nichols 10%+ Owner $16,305,937 +$5,512 +0.03% Filing P/S 31 Mar 2026
Ali Behbahani Director $15,263,221 Mixed 10 Jun 2026
Carmen Chang 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Mathers Edward T. 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Scott D. Sandell 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Forest Baskett 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Anthony A. Florence Jr. 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Paul Edward Walker 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Rick Yang 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Mohamad Makhzoumi 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
New Enterprise Associates 17, L.P. 10%+ Owner $14,419,591 +$2,300,881 +19% Filing P/S 10 Mar 2026
Atlas Venture Opportunity Fund II, L.P. 10%+ Owner $10,924,144 Filing P/S 22 Apr 2024
Jean Francois Formela Director $2,042,417 -$4,041,449 -66% Filing P/S 02 Jul 2026
Ram Aiyar President and CEO, Director $1,023,746 -$196,673 -16% Mixed 29 May 2026
Jeffrey Cerio General Counsel $550,881 -$71,575 -11% Median 15 Jul 2026
Loic A. Vincent Chief Scientific Officer $340,035 -$37,017 -9.8% Median 15 Jul 2026
Todd Chappell Chief Operating Officer $322,464 -$34,309 -9.6% Median 15 Jul 2026
Oliver Dolan Senior Vice President, Finance $311,063 -$36,638 -11% Median 15 Jul 2026
Christopher R. Loose Chief Scientific Officer $97,335 Mixed 27 Jul 2023

Recent insider transactions for Korro Bio, Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Loic A. Vincent KRRO Common Stock Award 41% 7,500 25,797 15 Jul 2026 Direct
Oliver Dolan KRRO Common Stock Award 30.4% 5,500 23,599 15 Jul 2026 Direct
Jeffrey Cerio KRRO Common Stock Award 18.4% 6,500 41,793 15 Jul 2026 Direct
Todd Chappell KRRO Common Stock Award 44.2% 7,500 24,464 15 Jul 2026 Direct
Jean Francois Formela KRRO Common Stock Sale -5.99% $130,149 $13.96 -9,323 146,305 06 Jul 2026 See footnote
Jean Francois Formela KRRO Common Stock Sale -39.4% $1,412,821 $14.03 -100,700 154,811 02 Jul 2026 See footnote
Jean Francois Formela KRRO Common Stock Sale -22.2% $707,491 $14.61 -48,438 169,556 24 Jun 2026 See footnote
Jean Francois Formela KRRO Common Stock Sale -40.2% $1,695,821 $14.25 -119,005 176,649 23 Jun 2026 See footnote
Jean Francois Formela KRRO Common Stock Sale -2% $55,270 $13.95 -3,962 194,075 22 Jun 2026 See footnote
Todd Chappell KRRO Common Stock Sale -15.7% $34,309 $10.83 -3,168 16,964 16 Jun 2026 Direct
Loic A. Vincent KRRO Common Stock Sale -15.7% $37,017 $10.83 -3,418 18,297 16 Jun 2026 Direct
Jeffrey Cerio KRRO Common Stock Sale -15.8% $71,575 $10.83 -6,609 35,293 16 Jun 2026 Direct
Oliver Dolan KRRO Common Stock Sale -15.8% $36,638 $10.83 -3,383 18,099 16 Jun 2026 Direct
Ali Behbahani KRRO Stock Option (Right to Buy) Award 14,677 14,677 10 Jun 2026 Direct
Rachel Meyers KRRO Stock Option (Right to Buy) Award 14,677 14,677 10 Jun 2026 Direct
Nessan Bermingham KRRO Stock Option (Right to Buy) Award 14,677 14,677 10 Jun 2026 Direct
Katharine Knobil KRRO Stock Option (Right to Buy) Award 14,677 14,677 10 Jun 2026 Direct
Jean Francois Formela KRRO Stock Option (Right to Buy) Award 14,677 14,677 10 Jun 2026 Direct
Timothy R. Pearson KRRO Stock Option (Right to Buy) Award 14,677 14,677 10 Jun 2026 Direct
Ram Aiyar KRRO Common Stock Sale -16.8% $196,673 $12.98 -15,152 74,848 29 May 2026 Direct
Jean Francois Formela KRRO Common Stock Sale -1.45% $39,897 $13.95 -2,860 194,655 28 May 2026 See footnote
Ram Aiyar KRRO Common Stock Award 125% 50,000 90,000 26 May 2026 Direct
Lynx1 Capital Management LP KRRO Common stock, $0.001 par value per share Purchase 0.03% $5,512 $10.60 520 1,538,296 31 Mar 2026 See footnote
Lynx1 Capital Management LP KRRO Common stock, $0.001 par value per share Purchase 0.03% $5,512 $10.60 520 1,538,296 31 Mar 2026 See footnote
Rick Yang KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Rick Yang KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Scott D. Sandell KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Scott D. Sandell KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
New Enterprise Associates 17, L.P. KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 Direct
New Enterprise Associates 17, L.P. KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 Direct
Carmen Chang KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Carmen Chang KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Ali Behbahani KRRO Common Stock Award 19% 207,100 1,297,893 10 Mar 2026 See Note 2
Ali Behbahani KRRO Pre-Funded Warrants Award 242,945 242,945 10 Mar 2026 See Note 2
Forest Baskett KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Forest Baskett KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Mathers Edward T. KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Mathers Edward T. KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Mohamad Makhzoumi KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Mohamad Makhzoumi KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Paul Edward Walker KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Paul Edward Walker KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Anthony A. Florence Jr. KRRO Common Stock Purchase 19% $2,300,881 $11.11 207,100 1,297,893 10 Mar 2026 See Note 2
Anthony A. Florence Jr. KRRO Pre-Funded Warrants Purchase 242,945 242,945 10 Mar 2026 See Note 2
Ram Aiyar KRRO Common Stock Award 40,000 40,000 02 Feb 2026 Direct
Ram Aiyar KRRO Stock Option (Right to Buy) Award 80,000 80,000 02 Feb 2026 Direct
Loic A. Vincent KRRO Stock Option (Right to Buy) Award 35,000 35,000 02 Feb 2026 Direct
Oliver Dolan KRRO Stock Option (Right to Buy) Award 15,000 15,000 02 Feb 2026 Direct
Jeffrey Cerio KRRO Stock Option (Right to Buy) Award 23,000 23,000 02 Feb 2026 Direct
Todd Chappell KRRO Stock Option (Right to Buy) Award 38,000 38,000 02 Feb 2026 Direct
* marks a reported price that did not pass the local price check.
We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .