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Insider Cluster (2 insiders) ·Filed Jun 2, 2026

KRRO

Korro Bio, Inc.
NEUTRAL
Impact 3/10
Horizondays Processed4mo ago
Insider cluster: 2 insiders, $231K total
Actionable Insight • Neutral

Insider selling at this scale is too small to warrant a directional trade. Aiyar and Formela are significant shareholders; a single modest open-market sale by each is within normal liquidity patterns. Traders should focus on upcoming pipeline catalysts (phase data, trial updates) rather than this insider activity.

DirectionNeutral
Confidencehigh
Horizondays
Final — all horizons settled through T+60d
KRRO ▲ +24.36% at T+60d
NEUTRAL call +24.36% · α vs SPY +23.25% · entry $11.00 → $13.68
Entry = T+0 close
Jun 2, 2026
via day close
T+1d
+0.73%
call +0.73% · α +1.45%
$11.08
settled 5mo ago
T+5d
-0.55%
call -0.55% · α +2.42%
$10.94
settled 5mo ago
T+20d
+24.09%
call +24.09% · α +25.66%
$13.65
settled 4mo ago
T+60d
+24.36%
call +24.36% · α +23.25%
$13.68
settled 2mo ago

Price Chart

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Executive Summary

Two insiders at Korro Bio, CEO Ram Aiyar and Director Jean Francois Formela, sold a combined $231K in open-market sales over two days. The CEO’s $197K sale represents roughly 0.1% of the $186M market cap, a modest amount that is routine relative to company size. No other material corporate events or filings accompany these sales, suggesting liquidity-driven or pre-scheduled dispositions rather than a bearish signal.

Key Financial Metrics

Direction
selling
Total Value
$230.7K
Insiders
2

Key Facts

  • CEO Ram Aiyar sold 15,152 open-market shares on 2026-05-29 for ~$197K.
  • Director Jean Francois Formela sold 2,441 open-market shares on 2026-05-28 for ~$34K.
  • Combined $231K in sales equals ~0.12% of Korro Bio's $186M market cap.
  • No 10b5-1 plan designation is stated in the filings, but the modest dollar amounts and single-transaction-per-insider pattern are consistent with routine portfolio rebalancing or tax management.
  • No recent earnings, M&A, or regulatory catalyst was filed alongside this cluster.
  • The analyst consensus is heavily bullish (81% buy), contrasting with the insider activity.

Financial Impact

Total insider selling of $231K represents ~0.12% of market cap.

insider holdings

Risk Factors

  • If additional unannounced insider selling follows, the pattern could shift from routine to concerning.
  • No earnings or material event in the window; the lack of context makes these trades less informative.

Market Snapshot

Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
81% bullish (16 analysts)

Investment Themes

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-KRRO-1780398034986
20 reports for KRRO
Performance horizon
71% Hit rate @ T+1 5 of 7 directional calls Went positive at some point 6 of 7 best @ T+5▲ +50.38%May 19, 2026
Filters
Rows
Reports for KRRO — sortable, filterable
TypeNow
Oct 27, 2026
today
SC 13G/A
NEUTRAL ★ 2/10
$12.73awaiting T+1—$13.30 (+4.48%)
Oct 26, 2026
1d ago
Insider Buy
BULLISH ★ 5/10
$12.46awaiting T+1—$13.30 (+6.74%)
Oct 22, 2026
5d ago
8-K
BULLISH ★ 6/10
$12.05 $11.98▼ −0.58%▼ −0.06%$13.30 (+10.37%)
Oct 16, 2026
11d ago
Press Release
NEUTRAL ★ 2/10
$8.91 $9.44▲ +5.95%▲ +5.61%$13.30 (+49.27%)
Oct 5, 2026
22d ago
8-K
NEUTRAL ★ 4/10
$9.76 $10.49▲ +7.48%▲ +7.72%$13.30 (+36.27%)
Oct 5, 2026
22d ago
Press Release
NEUTRAL ★ 4/10
$9.76 $10.49▲ +7.48%▲ +7.72%$13.30 (+36.27%)
Sep 15, 2026
6w ago
Insider Cluster
NEUTRAL ★ 2/10
$13.83 $11.80▼ −14.68%▼ −15.81%$13.30 (−3.83%)
Aug 13, 2026
10w ago
Insider Cluster
NEUTRAL ★ 4/10
$13.29 $13.28▼ −0.08%▲ +0.12%$13.30 (+0.08%)
Aug 6, 2026
11w ago
8-K
BULLISH ★ 6/10
$12.12 $13.25▲ +9.32%▲ +8.71%$13.30 (+9.74%)
Jul 9, 2026
15w ago
Institutional Cluster
BULLISH ★ 6/10
$14.30 $14.56▲ +1.82%▲ +1.39%$13.30 (−6.99%)
Showing 10 of 20

US Market Status

Market Closed — Opens Thu (10h 11m)

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Report published Jun 2, 2026