KRRONasdaq

Korro Bio, Inc.

Alert me on KRRO

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

Sep 16 Sale FORMELA JEAN FRANCOIS Insider

1 week

−28.9%S&P +2.1%

1 month

−32.7%S&P +2.6%

3 months

Result in36 trading days

6 months

Result in99 trading days

Sep 15 Sale Dolan Oliver Insider

1 week

−26.5%S&P +2.4%

1 month

−36.9%S&P +1.9%

3 months

Result in35 trading days

6 months

Result in98 trading days

Sep 11 Sale Dolan Oliver Insider

1 week

−27.4%S&P −0.1%

1 month

−32.2%S&P +2.1%

3 months

Result in33 trading days

6 months

Result in96 trading days

Aug 29 Sale FORMELA JEAN FRANCOIS Insider

1 week

+8.2%S&P −0.1%

1 month

−20.7%S&P −0.3%

3 months

Result in25 trading days

6 months

Result in88 trading days

Aug 22 Sale FORMELA JEAN FRANCOIS Insider

1 week

−4.4%S&P +0.5%

1 month

−24.8%S&P +0.8%

3 months

Result in20 trading days

6 months

Result in83 trading days

Show all 30

Aug 14 Sale FORMELA JEAN FRANCOIS Insider

1 week

−0.8%S&P −1.4%

1 month

+5.9%S&P −2.4%

3 months

Result in14 trading days

6 months

Result in77 trading days

Aug 13 Buy Lynx1 Capital Management LP Insider

1 week

−2.5%S&P −2.0%

1 month

+4.4%S&P −2.2%

3 months

Result in13 trading days

6 months

Result in76 trading days

Aug 13 Buy Nichols Weston Insider

1 week

−2.5%S&P −2.0%

1 month

+4.4%S&P −2.2%

3 months

Result in13 trading days

6 months

Result in76 trading days

Aug 6 Sale Aiyar Ram Insider

1 week

+9.7%S&P +1.2%

1 month

+1.0%S&P +0.2%

3 months

Result in8 trading days

6 months

Result in71 trading days

Jul 8 Sale FORMELA JEAN FRANCOIS Insider

1 week

−11.5%S&P +1.3%

1 month

−17.7%S&P +3.1%

3 months

−33.7%S&P +4.8%

6 months

Result in50 trading days

Jun 25 Sale FORMELA JEAN FRANCOIS Insider

1 week

+15.0%S&P +1.4%

1 month

−11.9%S&P +0.7%

3 months

−21.4%S&P +4.7%

6 months

Result in42 trading days

Jun 18 Sale Vincent Loic A Insider

1 week

−2.2%S&P −2.4%

1 month

−7.9%S&P +0.2%

3 months

−22.9%S&P +2.3%

6 months

Result in38 trading days

Jun 18 Sale Cerio Jeffrey Insider

1 week

−2.2%S&P −2.4%

1 month

−7.9%S&P +0.2%

3 months

−22.9%S&P +2.3%

6 months

Result in38 trading days

Jun 18 Sale Chappell Todd Insider

1 week

−2.2%S&P −2.4%

1 month

−7.9%S&P +0.2%

3 months

−22.9%S&P +2.3%

6 months

Result in38 trading days

Jun 18 Sale Dolan Oliver Insider

1 week

−2.2%S&P −2.4%

1 month

−7.9%S&P +0.2%

3 months

−22.9%S&P +2.3%

6 months

Result in38 trading days

Jun 2 Sale FORMELA JEAN FRANCOIS Insider

1 week

−0.5%S&P −3.0%

1 month

+27.3%S&P −1.7%

3 months

+11.3%S&P +0.5%

6 months

Result in26 trading days

Jun 2 Sale Aiyar Ram Insider

1 week

−0.5%S&P −3.0%

1 month

+27.3%S&P −1.7%

3 months

+11.3%S&P +0.5%

6 months

Result in26 trading days

Apr 2 Buy Lynx1 Capital Management LP Insider

1 week

−9.4%S&P +3.6%

1 month

−6.9%S&P +9.5%

3 months

+0.4%S&P +14.8%

6 months

−31.1%S&P +17.9%

Apr 2 Buy Nichols Weston Insider

1 week

−9.4%S&P +3.6%

1 month

−6.9%S&P +9.5%

3 months

+0.4%S&P +14.8%

6 months

−31.1%S&P +17.9%

Mar 13 Buy Makhzoumi Mohamad Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy BASKETT FOREST Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy Walker Paul Edward Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy SANDELL SCOTT D Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy Yang Rick Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy New Enterprise Associates 17, L.P. Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy NEA Partners 17, L.P. Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy NEA 17 GP, LLC Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy Mathers Edward T Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy Florence Anthony A. Jr. Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Mar 13 Buy Chang Carmen Insider

1 week

−16.0%S&P −1.8%

1 month

+8.8%S&P +5.1%

3 months

−9.3%S&P +12.3%

6 months

+8.4%S&P +15.5%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for KRRO

93 held · newest 593 held · newest 2

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See all 93 filings for KRRO

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Jun 30, 2026 Schedule 13G, amended

BALYASNY ASSET MANAGEMENT L.P.: 6.6%, 951,783 shares

Jun 24, 2026 Schedule 13D, amended

Atlas Venture Fund XI, L.P.: 4.9%, 706,556 shares

Jun 30, 2026 Schedule 13G

BlackRock, Inc.: 5.2%, 747,546 shares

Mar 31, 2026 Schedule 13G, amended

Point72 Biotech Private Investments, LLC: 1.9%, 276,831 shares

Mar 31, 2026 Schedule 13G

Balyasny Asset Management L.P.: 7.2%, 1,040,054 shares

Mar 31, 2026 Schedule 13G, amended

Lynx1 Capital Management LP: 10.7%, 1,538,296 shares

Mar 13, 2026 Schedule 13G, amended

The Vanguard Group: 0%, 0 shares

Mar 10, 2026 Schedule 13G

Venrock Healthcare Capital Partners III, L.P.: 9.9%, 1,488,685 shares

Mar 10, 2026 Schedule 13D, amended

New Enterprise Associates 17, L.P.: 9.9%, 1,435,487 shares

Mar 10, 2026 Schedule 13G

Steven A. Cohen: 5.7%, 816,885 shares

Dec 31, 2025 Schedule 13G, amended

Point72 Biotech Private Investments, LLC: 2.9%, 276,831 shares

Dec 31, 2025 Schedule 13G, amended

DRIEHAUS CAPITAL MANAGEMENT LLC: 0%, 0 shares

Dec 31, 2025 Schedule 13G

Nantahala Capital Management, LLC: 6.4%, 600,000 shares

Dec 31, 2025 Schedule 13G, amended

FMR LLC: 0.4%, 37,857 shares

Dec 31, 2025 Schedule 13G

The Vanguard Group: 5.2%, 489,639 shares

Dec 23, 2025 Schedule 13G

Lynx1 Capital Management LP: 7.8%, 733,633 shares

Sep 30, 2025 Schedule 13G, amended

DRIEHAUS CAPITAL MANAGEMENT LLC: 7.2%, 671,981 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

No lobbying reports on file.