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sellNotable cluster of 310b5-1 plan

Andrew Bialecki sold $3.7M of KVYO

Co-Chief Executive Officer at Klaviyo, Inc.. 200,000 shares at an average of $18.63, traded Apr 7, 2026, filed Apr 9, 2026.

Warning score
65
Value
$3.7M
200,000 shares
Holdings after
0
-100% from before
From 52-week low
+17%
low $15.88, close $18.64
From 52-week high
-50%
high $37.50, as of Apr 7, 2026

Score components

  • Role
    CEO
    +25
  • Trade size
    $3.7M at market
    +25
  • Share of holdings sold
    Sold 100% of holdings
    +20
  • Cluster
    3 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

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.

This signal so far: 1m -14.5%, 3m -3.5%, 6m -1.2%.

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.

KVYOOct 12, 2026 · close 17.11
Since filing Apr 9, 2026: -3.8%SPY +15.0% · excess -18.8%

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 0001470831-26-000355, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Apr 7, 2026CConversion
Series A Common Stock10b5-1
+200,000--200,000Apr 9, 2026
Apr 7, 2026SOpen-market sale
Series A Common Stock10b5-1
-200,000$18.63$3.7M0Apr 9, 2026
Apr 7, 2026CConversion
Series B Common Stockderivative10b5-1
-200,000$0.00$067,544,118Apr 9, 2026

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
40Moderate
KVYOsell10b5-1
Klaviyo, Inc.
Ed Hallen
director, owner
$1.7M
97,482 shares
-104%
3Weak
KVYOsell 210b5-1
Klaviyo, Inc.
Ed Hallen
director, owner
$22k
1,300 shares
-1%
16Weak
KVYOsell 310b5-1
Klaviyo, Inc.
Susan St. Ledger
director
$37k
2,328 shares
-9%
40Moderate
KVYOsell 410b5-1
Klaviyo, Inc.
Landon Edmond
Chief Legal Officer
$1.2M
61,576 shares
-11%
55Moderate
KVYOsell 310b5-1
Klaviyo, Inc.
Ed Hallen
director, owner
$2.0M
98,782 shares
-74%
30Weak
KVYOsell 310b5-1
Klaviyo, Inc.
Amanda Whalen
Chief Financial Officer
$259k
14,000 shares
-2%
65Notable
KVYOsell 2
Klaviyo, Inc.
Summit Partners L P
owner
$89M
5,000,000 shares
-100%
15Weak
KVYOsell10b5-1
Klaviyo, Inc.
Amanda Whalen
Chief Financial Officer
$249k
14,000 shares
-2%
14Weak
KVYOsell10b5-1
Klaviyo, Inc.
Amanda Whalen
Chief Financial Officer
$185k
14,000 shares
-2%
65Notable
KVYOsell 310b5-1
Klaviyo, Inc.
Andrew Bialecki
Co-Chief Executive Officer
$3.1M
212,529 shares
-100%

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.

Andrew Bialecki sold $3.7M of KVYO | InsiderTell