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sellModerate cluster of 5

Jeffrey Cerio sold $72k of KRRO

General Counsel at Korro Bio, Inc.. 6,609 shares at an average of $10.83, traded Jun 16, 2026, filed Jun 17, 2026.

Warning score
43
Value
$72k
6,609 shares
Holdings after
35,293
-16% from before
From 52-week low
+102%
low $5.28, close $10.66
From 52-week high
-79%
high $51.36, as of Jun 16, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $72k at market
    +8
  • Share of holdings sold
    Sold 16% of holdings
    +5
  • Cluster
    5 insiders selling within 14 days
    +15

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

KRROOct 9, 2026 · close 10.16
Since filing Jun 17, 2026: -8.1%SPY +5.6% · excess -13.7%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001193125-26-274143, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 16, 2026SOpen-market sale
Common Stock
-6,609$10.83$72k35,293Jun 17, 2026

Related signals

Other insiders at Korro Bio, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
24Weak
KRROsell 210b5-1
Korro Bio, Inc.
Jean Francois Formela
director
$686k
48,690 shares
-7%
3Weak
KRROsell 210b5-1
Korro Bio, Inc.
Oliver Dolan
Senior Vice President, Finance
$69
5 shares
-0%
23Weak
KRROsell 210b5-1
Korro Bio, Inc.
Oliver Dolan
Senior Vice President, Finance
$99k
7,353 shares
-31%
3Weak
KRROsell 210b5-1
Korro Bio, Inc.
Jean Francois Formela
director
$4,188
300 shares
-0%
11Weak
KRROsell10b5-1
Korro Bio, Inc.
Jean Francois Formela
director
$399k
28,468 shares
-4%
8Weak
KRROsell 210b5-1
Korro Bio, Inc.
Jean Francois Formela
director
$30k
2,143 shares
-0%
24Weak
KRRObuy
Korro Bio, Inc.
Lynx1 Capital Management LP
owner
$79k
6,684 shares
+0%
41Moderate
KRROsell 2
Korro Bio, Inc.
Ram Aiyar
President and CEO
$63k
5,802 shares
-8%
25Weak
KRROsell10b5-1
Korro Bio, Inc.
Jean Francois Formela
director
$1.5M
110,023 shares
-14%
40Moderate
KRROsell 510b5-1
Korro Bio, Inc.
Jean Francois Formela
director
$2.5M
171,405 shares
-18%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Jeffrey Cerio sold $72k of KRRO | InsiderTell