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sellNotable cluster of 9

Chirfi Guindo sold $1.2M of MRK

Chief Marketing Officer at Merck & Co., Inc.. 10,000 shares at an average of $118.41, traded Feb 9, 2026, filed Feb 9, 2026.

Warning score
60
Value
$1.2M
10,000 shares
Holdings after
70,615
-12% from before
From 52-week low
+65%
low $69.98, close $115.27
From 52-week high
-4%
high $119.46, as of Feb 9, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $1.2M at market
    +25
  • Share of holdings sold
    Sold 12% of holdings
    +5
  • Cluster
    9 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.

This signal so far: 1m -1.2%, 3m -4.7%, 6m +12.9%.

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 Feb 9, 2026: +26.3%SPY +13.0% · excess +13.3%

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 0000310158-26-000048, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 9, 2026SOpen-market sale
Common Stock
-10,000$118.41$1.2M70,615Feb 9, 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%
60Notable
MRKsell 5
Merck & Co., Inc.
Jennifer Zachary
EVP, General Counsel
$11M
80,315 shares
-64%
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.
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.

Chirfi Guindo sold $1.2M of MRK | InsiderTell