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sellNotable cluster of 5

Jennifer Zachary sold $11M of MRK

EVP, General Counsel at Merck & Co., Inc.. 80,315 shares at an average of $133.46, traded Aug 12, 2026, filed Aug 13, 2026.

Warning score
60
Value
$11M
80,315 shares
Holdings after
45,509
-64% from before
From 52-week low
+75%
low $75.39, close $132.14
From 52-week high
0%
high $132.14, as of Aug 12, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $10.7M at market
    +25
  • Share of holdings sold
    Sold 64% of holdings
    +20
  • Cluster
    5 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -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.

MRKOct 9, 2026 · close 145.60
Since filing Aug 13, 2026: +8.0%SPY +0.3% · excess +7.7%

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 0000310158-26-000221, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 12, 2026MOption exercise
Common Stock
+41,494$117.89$4.9M112,391Aug 13, 2026
Aug 12, 2026MOption exercise
Common Stock
+13,433$84.71$1.1M125,824Aug 13, 2026
Aug 12, 2026SOpen-market sale
Common Stock
-80,315$133.46$11M45,509Aug 13, 2026
Aug 12, 2026MOption exercise
Stock Option (Right to Buy)derivative
-41,494$0.00$00Aug 13, 2026
Aug 12, 2026MOption exercise
Stock Option (Right to Buy)derivative
-13,433$0.00$00Aug 13, 2026

Related signals

Other insiders at Merck & Co., Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
60Notable
MRKsell 5
Merck & Co., Inc.
Chirfi Guindo
EVP, Access, Policy & Comms
$1.4M
10,000 shares
-21%
65Notable
MRKsell 5
Merck & Co., Inc.
Richard R. DeLuca
EVP&Pres, Merck Animal Heallth
$5.9M
45,320 shares
-29%
52Moderate
MRKsell 5
Merck & Co., Inc.
Richard R. DeLuca
EVP&Pres, Merck Animal Heallth
$789k
6,050 shares
-4%
60Notable
MRKsell 5
Merck & Co., Inc.
Chirfi Guindo
EVP, Access, Policy & Comms
$2.0M
15,000 shares
-24%
60Notable
MRKsell 5
Merck & Co., Inc.
David R. Maraldo
EVP & Pres. MMD
$2.4M
18,706 shares
-76%
60Notable
MRKsell 5
Merck & Co., Inc.
David Michael Williams
EVP,Chief Info&Digital Officer
$6.8M
52,847 shares
-146%
60Notable
MRKsell 9
Merck & Co., Inc.
Chirfi Guindo
Chief Marketing Officer
$1.2M
10,000 shares
-14%
60Notable
MRKsell 9
Merck & Co., Inc.
Dean Y Li
Executive VP & President, MRL
$1.2M
10,235 shares
-10%
60Notable
MRKsell 9
Merck & Co., Inc.
Chirfi Guindo
Chief Marketing Officer
$1.2M
10,000 shares
-12%
60Notable
MRKsell 9
Merck & Co., Inc.
Jennifer Zachary
EVP, General Counsel
$14M
121,573 shares
-128%

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.

Jennifer Zachary sold $11M of MRK | InsiderTell