LYTIR

Company · MRK

Merck & Company, Inc.

Name as listed on its exchange; filed with the SEC as Merck & Co., Inc.

Nasdaq's symbol directory lists MRK on the New York Stock Exchange as “Merck & Company, Inc. Common Stock (new)”.

In the 12 months to Nov 8, 2026: insiders sold on 9 occasions ($30.0M); 10 planned-sale notices; 7 congressional trade disclosures; 3 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Jennifer Zachary, EVP, General Counsel sold on 1 day latest Aug 12, 2026 sold $10.7M
  2. David Michael Williams, EVP,Chief Info&Digital Officer sold on 1 day latest Aug 5, 2026 sold $6.8M
  3. DeLuca Richard R., EVP&Pres, Merck Animal Heallth sold on 4 days latest Aug 12, 2026 sold $6.7M
  4. Chirfi Guindo, EVP, Access, Policy & Comms sold on 2 days latest Aug 13, 2026 sold $3.3M
  5. David R. Maraldo, EVP & Pres. MMD sold on 1 day latest Aug 5, 2026 sold $2.4M
Every trade (9)
  1. SELLChirfi Guindo, EVP, Access, Policy & Comms sold Aug 13, 2026 10,000 shares filing $1.4M
  2. SELLJennifer Zachary, EVP, General Counsel sold Aug 12, 2026 80,315 shares filing $10.7M
  3. SELLDeLuca Richard R., EVP&Pres, Merck Animal Heallth sold Aug 12, 2026 11,699 shares 2 legs combined filing $1.5M
  4. SELLDeLuca Richard R., EVP&Pres, Merck Animal Heallth sold Aug 11, 2026 12,837 shares 2 legs combined filing $1.7M
  5. SELLDeLuca Richard R., EVP&Pres, Merck Animal Heallth sold Aug 10, 2026 20,784 shares filing $2.7M
  6. SELLChirfi Guindo, EVP, Access, Policy & Comms sold Aug 6, 2026 15,000 shares filing $2.0M
  7. SELLDeLuca Richard R., EVP&Pres, Merck Animal Heallth sold Aug 6, 2026 6,050 shares 3 legs combined filing $789K
  8. SELLDavid Michael Williams, EVP,Chief Info&Digital Officer sold Aug 5, 2026 52,847 shares 3 legs combined filing $6.8M
  9. SELLDavid R. Maraldo, EVP & Pres. MMD sold Aug 5, 2026 18,706 shares 3 legs combined filing $2.4M

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. DAVID M WILLIAMS filed Nov 2, 2026 Officer 21,359 shares planned sale date 11/02/2026 filing $3.2M
  2. CHIRFI GUINDO filed Aug 13, 2026 Officer 10,000 shares planned sale date 08/13/2026 filing $1.4M
  3. JENNIFER L ZACHARY filed Aug 12, 2026 Officer 80,315 shares planned sale date 08/12/2026 filing $10.7M
  4. RICHARD ROBERT DELUCA JR filed Aug 12, 2026 Officer 11,699 shares planned sale date 08/12/2026 filing $1.5M
  5. RICHARD ROBERT DELUCA JR filed Aug 11, 2026 Officer 12,837 shares planned sale date 08/11/2026 filing $1.7M
  6. RICHARD ROBERT DELUCA JR filed Aug 10, 2026 Officer 20,784 shares planned sale date 08/10/2026 filing $2.7M
  7. CHIRFI GUINDO filed Aug 6, 2026 Officer 15,000 shares planned sale date 08/06/2026 filing $2.0M
  8. RICHARD ROBERT DELUCA JR filed Aug 6, 2026 Officer 6,050 shares planned sale date 08/06/2026 filing $789K
  9. DAVID M WILLIAMS filed Aug 5, 2026 Officer 52,847 shares planned sale date 08/05/2026 filing $6.8M
  10. DAVID MARALDO filed Aug 5, 2026 Officer 18,706 shares planned sale date 08/05/2026 filing $2.4M

Congress · STOCK Act

The Althing

Periodic transaction reports. Amounts are the ranges members report; the trade date is when it happened, the report can come up to 45 days later.

  1. Maria Elvira Salazar (R-FL27): Sale Sep 24, 2026 reported Oct 7, 2026 one of 42 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  2. Maria Elvira Salazar (R-FL27): Purchase Aug 19, 2026 reported Sep 9, 2026 one of 12 trades the member reported that day House Stocks (including ADRs) $15,001 - $50,000
  3. Maria Elvira Salazar (R-FL27): Purchase Aug 19, 2026 reported Sep 9, 2026 one of 12 trades the member reported that day House Stocks (including ADRs) $15,001 - $50,000
  4. Alan Armstrong (R-OK): Sale (Full) Mar 27, 2026 reported Jul 21, 2026 one of 703 trades the member reported that day Senate Stock $15,001 - $50,000
  5. Josh Gottheimer (D-NJ05): Purchase Feb 4, 2026 reported Mar 16, 2026 one of 16 trades the member reported that day House Stocks (including ADRs) owner: joint $1,001 - $15,000
  6. Gilbert Cisneros (D-CA31): Purchase Dec 19, 2025 reported Jan 12, 2026 one of 121 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000
  7. Julie Johnson (D-TX32): Sale Dec 18, 2025 reported Jan 15, 2026 one of 62 trades the member reported that day House Stocks (including ADRs) owner: joint $1,001 - $15,000

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 29, 2026
  2. Departure or appointment of directors or officers filing Oct 13, 2026
  3. Results of operations and financial condition filing Aug 4, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.