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The company

Korro Bio, Inc.

KRRO · Nasdaq

Health CareBiotechnologyNot moving yetSynthetic Biology / TechBio

KRRO stood above a rising 150-day average in 9 of the last 52 weekly readings, and has been out of that trend for the last 5 weeks. It is 29.5% below that average now. Biotechnology: 15% of its 561 stocks in an uptrend (−17 points in four weeks); Health Care: 25% (−11 points in four weeks).

Statistics

Rotation
Not moving yet
Weeks in an uptrend
out for 5
Industry in uptrend
15% -17 in 4 wk
Insider buys, 12 months
$41.6M
Insider sales, 12 months
$11.4M
Officials’ trades on record
0
Institutions holding
103 (+9)

In the rotation

Each square a week: lit when it closed above a rising 150-day average. 9 of 52 weeks.

17 Apr – 16 Oct
16%28%39%Apr 26Jun 26Jul 26Sep 26Oct 26

Biotechnology: Few of its stocks are in an uptrend and the share has fallen sharply over four weeks. Health Care: A minority of its stocks are in an uptrend and the share has fallen sharply over four weeks.

Money in and out

1 Nov 2024 – 1 Oct 2026
$0$39.7MNov 24May 25Nov 25Apr 26Oct 26

Open-market buys above the line and sales below, in dollars.

Congress and officials

No member of Congress or official has disclosed a trade in it.

Insiders

Buy orders, 12 months13
Sale orders, 12 months20
Buyers · sellers11 · 6
WhoDidSharesTraded
Jean Francois FormelaDirectorsold31,888at $14.1214 Sep 2026filed 15 Sep 2026
Jean Francois FormelaDirectorsold6,602at $14.1214 Sep 2026filed 15 Sep 2026
Jean Francois FormelaDirectorsold8,450at $13.9911 Sep 2026filed 15 Sep 2026
Jean Francois FormelaDirectorsold1,750at $13.9911 Sep 2026filed 15 Sep 2026
Oliver DolanSenior Vice President, Financesold5at $13.7211 Sep 2026filed 14 Sep 2026
Oliver DolanSenior Vice President, Financesold6at $13.609 Sep 2026filed 10 Sep 2026
Oliver DolanSenior Vice President, Financesold7,347at $13.518 Sep 2026filed 10 Sep 2026
Jean Francois FormelaDirectorsold249at $13.9626 Aug 2026filed 28 Aug 2026
Jean Francois FormelaDirectorsold51at $13.9626 Aug 2026filed 28 Aug 2026
Jean Francois FormelaDirectorsold23,584at $14.0019 Aug 2026filed 21 Aug 2026
Jean Francois FormelaDirectorsold4,884at $14.0019 Aug 2026filed 21 Aug 2026
Jean Francois FormelaDirectorsold1,775at $13.9611 Aug 2026filed 13 Aug 2026

Lines filed since 2 January 2026, newest first; every insider’s older lines are on their own page.

Institutions

Holders103+9 on the quarter
New · exited20 · 12
Reported value$184.7M

Quarter to 30 Jun 2026, against 31 Mar 2026; newest filing 31 Aug 2026.

ManagerSharesChange
Lynx1 Capital Management LPunchanged · filed 12 Aug 20261,538,296$20.3M00.0%
NEA Management Company, LLCunchanged · filed 14 Aug 20261,297,893$17.1M00.0%
Venrock Adviser, LLCunchanged · filed 14 Aug 20261,009,500$13.3M00.0%
Atlas Venture Life Science Advisors, LLCreduced · filed 13 Aug 2026962,884$12.7M-174,265−15.3%
Balyasny Asset Management L.P.reduced · filed 14 Aug 2026951,783$12.5M-88,271−8.5%
BlackRock, Inc.added · filed 7 Aug 2026817,621$10.8M+357,615+77.7%
Affinity Asset Advisors, LLCunchanged · filed 13 Aug 2026706,904$9.3M00.0%
Nantahala Capital Management, LLCunchanged · filed 14 Aug 2026660,036$8.7M00.0%
ADAGE CAPITAL PARTNERS GP, L.L.C.added · filed 14 Aug 2026540,968$7.1M+312,568+136.9%
ADAR1 Capital Management, LLCunchanged · filed 14 Aug 2026540,054$7.1M00.0%
31 Dec 2023 – 30 Jun 2026
3769101Dec 23Sep 24Mar 25Dec 25Jun 26

Everyone who traded it

Jean Francois Formela Company insiderDirector · last 14 Sep 20260 · 11
Oliver Dolan Company insiderSenior Vice President, Finance · last 11 Sep 20260 · 4
Lynx1 Capital Management LP Company insider10% owner · last 10 Aug 20263 · 0
Ram Aiyar Company insiderPresident and CEO · last 4 Aug 20260 · 2
Jeffrey Cerio Company insiderGeneral Counsel · last 15 Jul 20260 · 1
Loic A. Vincent Company insiderChief Scientific Officer · last 15 Jul 20260 · 1
Todd Chappell Company insiderChief Operating Officer · last 15 Jul 20260 · 1
Ali Behbahani Company insiderDirector · last 10 Jun 20260 · 0
Katharine Knobil Company insiderDirector · last 10 Jun 20260 · 0
Nessan Bermingham Company insiderDirector · last 10 Jun 20260 · 0
Rachel Meyers Company insiderDirector · last 10 Jun 20260 · 0
Timothy R. Pearson Company insiderDirector · last 10 Jun 20260 · 0

Same industry

MRNA ModernaLeading+147%
ENTX Entera BioLeading+37%
XNCR XencorLeading+30%

Distance from each stock’s own 150-day average.

Government contracts

No federal award is tied to it.

From its SEC filings

Return on capital employedFY 2025 · to 31 Dec 2025-120%
Share count trendFY 2025 · to 10 Mar 202653.1%
Cash and equivalentsFY 2025 · to 31 Dec 2025$21.8M
Free cash flowFY 2025 · to 31 Dec 2025−$79.1M

Analyst forecasts

No analyst forecasts yet.