Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 33 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
May 4, 2023 MRK M 813 · · 816 Direct -49.91% Disposed (price as of 2026-10-02)
May 4, 2023 MRK F 279 $118.22 $32,983 5,142 Direct -5.15% Disposed 22.1% (price as of 2026-10-02)
May 4, 2023 MRK M 813 $118.22 $96,113 5,421 Direct +17.64% Acquired 22.1% (price as of 2026-10-02)
May 3, 2023 MRK M 689 · · 1,378 Direct -33.33% Disposed (price as of 2026-10-02)
May 3, 2023 MRK F 236 $117.89 $27,822 4,608 Direct -4.87% Disposed 22.4% (price as of 2026-10-02)
May 3, 2023 MRK M 689 $117.89 $81,226 4,844 Direct +16.58% Acquired 22.4% (price as of 2026-10-02)
May 2, 2023 MRK A 1,781 · · 1,781 Direct · Acquired (price as of 2026-10-02)
May 2, 2023 MRK A 9,682 · · 9,682 Direct · Acquired (price as of 2026-10-02)
May 1, 2023 MRK M 643 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 1, 2023 MRK F 221 $115.47 $25,519 4,155 Direct -5.05% Disposed 25.0% (price as of 2026-10-02)
May 1, 2023 MRK M 643 $115.47 $74,247 4,376 Direct +17.22% Acquired 25.0% (price as of 2026-10-02)
May 4, 2022 MRK M 813 · · 1,629 Direct -33.29% Disposed (price as of 2026-10-02)
May 4, 2022 MRK F 279 $87.10 $24,301 3,664 Direct -7.08% Disposed 65.7% (price as of 2026-10-02)
May 4, 2022 MRK M 813 $87.10 $70,812 3,943 Direct +25.97% Acquired 65.7% (price as of 2026-10-02)
May 3, 2022 MRK A 2,067 · · 2,067 Direct · Acquired (price as of 2026-10-02)
May 3, 2022 MRK A 11,650 · · 11,650 Direct · Acquired (price as of 2026-10-02)
May 3, 2022 MRK M 452 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 3, 2022 MRK F 155 $87.65 $13,586 3,130 Direct -4.72% Disposed 64.6% (price as of 2026-10-02)
May 3, 2022 MRK M 452 $87.65 $39,618 3,285 Direct +15.95% Acquired 64.6% (price as of 2026-10-02)
May 1, 2022 MRK M 640 · · 643 Direct -49.88% Disposed (price as of 2026-10-02)
May 1, 2022 MRK F 220 $88.69 $19,512 2,833 Direct -7.21% Disposed 62.7% (price as of 2026-10-02)
May 1, 2022 MRK M 640 $88.69 $56,762 3,053 Direct +26.52% Acquired 62.7% (price as of 2026-10-02)
May 4, 2021 MRK M 694 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 4, 2021 MRK A 2,369 · · 2,369 Direct · Acquired (price as of 2026-10-02)
May 4, 2021 MRK A 18,367 · · 18,367 Direct · Acquired (price as of 2026-10-02)
May 4, 2021 MRK F 238 $75.98 $18,083 2,374 Direct -9.11% Disposed 99.0% (price as of 2026-10-02)
May 4, 2021 MRK M 694 $75.98 $52,730 2,612 Direct +36.18% Acquired 99.0% (price as of 2026-10-02)
May 3, 2021 MRK M 437 · · 439 Direct -49.89% Disposed (price as of 2026-10-02)
May 3, 2021 MRK F 150 $74.50 $11,175 1,918 Direct -7.25% Disposed 103.0% (price as of 2026-10-02)
May 3, 2021 MRK M 437 $74.50 $32,556 2,068 Direct +26.79% Acquired 103.0% (price as of 2026-10-02)
May 1, 2021 MRK M 622 · · 1,245 Direct -33.32% Disposed (price as of 2026-10-02)
May 1, 2021 MRK F 210 $74.50 $15,645 1,631 Direct -11.41% Disposed 103.0% (price as of 2026-10-02)
May 1, 2021 MRK M 622 $74.50 $46,339 1,841 Direct +51.03% Acquired 103.0% (price as of 2026-10-02)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
May 4, 2023 MRK Restricted Stock Unit Common Stock (813) · May 4, 2024 813 Disposed
May 3, 2023 MRK Restricted Stock Unit Common Stock (689) · May 3, 2025 689 Disposed
May 2, 2023 MRK Restricted Stock Unit Common Stock (1,781) · May 2, 2026 1,781 Acquired
May 2, 2023 MRK Stock Option (Right to Buy) Common Stock (9,682) $117.89 May 1, 2033 9,682 Acquired
May 1, 2023 MRK Restricted Stock Unit Common Stock (643) · May 1, 2023 643 Disposed
May 4, 2022 MRK Restricted Stock Unit Common Stock (813) · May 4, 2024 813 Disposed
May 3, 2022 MRK Restricted Stock Unit Common Stock (2,067) · May 3, 2025 2,067 Acquired
May 3, 2022 MRK Stock Option (Right to Buy) Common Stock (11,650) $87.10 May 2, 2032 11,650 Acquired
May 3, 2022 MRK Restricted Stock Unit Common Stock (452) · May 3, 2022 452 Disposed
May 1, 2022 MRK Restricted Stock Unit Common Stock (640) · May 1, 2023 640 Disposed
May 4, 2021 MRK Restricted Stock Unit Common Stock (694) · May 4, 2021 694 Disposed
May 4, 2021 MRK Restricted Stock Unit Common Stock (2,369) · May 4, 2024 2,369 Acquired
May 4, 2021 MRK Stock Option (Right to Buy) Common Stock (18,367) $75.99 May 3, 2031 18,367 Acquired
May 3, 2021 MRK Restricted Stock Unit Common Stock (437) · May 3, 2022 437 Disposed
May 1, 2021 MRK Restricted Stock Unit Common Stock (622) · May 1, 2023 622 Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 4 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
April 7, 2021 MRK Common Stock 1,219 Direct
April 7, 2021 MRK Restricted Stock Unit→ Common Stock (694) 694 Direct
April 7, 2021 MRK Restricted Stock Unit→ Common Stock (876) 876 Direct
April 7, 2021 MRK Restricted Stock Unit→ Common Stock (1,867) 1,867 Direct