Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 58 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

58 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
May 11, 2020 CENTA S 10,079 $31.92 $321,722 705 Direct -93.46% Disposed 35.5% (price as of 2026-10-06)
Aug. 6, 2019 CENTA P 1,000 $21.97 $21,970 10,079 Direct +11.01% Acquired 96.9% (price as of 2026-10-06)
Aug. 6, 2019 CENTA P 3,000 $21.90 $65,700 9,079 Direct +49.35% Acquired 97.5% (price as of 2026-10-06)
May 11, 2018 CENTA S 2,000 $36.62 $73,240 2,443 Direct -45.01% Disposed 18.1% (price as of 2026-10-06)
Feb. 15, 2018 CENTA S 3,000 $37.25 $111,750 4,443 Direct -40.31% Disposed 16.1% (price as of 2026-10-06)
Aug. 16, 2017 CENTA S 3,500 $32.97 $115,395 3,571 Direct -49.50% Disposed 31.2% (price as of 2026-10-06)
Feb. 7, 2017 CENTA S 2,500 $29.90 $74,750 1,639 Direct -60.40% Disposed 44.7% (price as of 2026-10-06)
Dec. 13, 2016 CENTA S 4,580 $29.50 $135,110 1,455 Direct -75.89% Disposed 46.7% (price as of 2026-10-06)
Aug. 5, 2016 CENTA S 2,664 $24.55 $65,401 1,455 Direct -64.68% Disposed 76.2% (price as of 2026-10-06)
Feb. 5, 2016 CENTA S 2,000 $14.18 $28,360 2,664 Direct -42.88% Disposed 205.1% (price as of 2026-10-06)
Feb. 5, 2016 CENTA S 5,000 $14.80 $74,000 0 Direct -100.00% Disposed 192.3% (price as of 2026-10-06)
Feb. 17, 2015 CENTA P 3,000 $9.00 $27,000 5,000 Direct +150.00% Acquired 380.7% (price as of 2026-10-06)
Feb. 17, 2015 CENTA P 2,000 $8.99 $17,980 2,000 Direct · Acquired 381.2% (price as of 2026-10-06)
Nov. 21, 2008 MRK P 5,000 $13.88 $69,400 15,024 Direct +49.88% Acquired 953.6% (price as of 2026-10-05)
Nov. 21, 2008 MRK P 5,000 $13.88 $69,400 15,024 Direct +49.88% Acquired 953.6% (price as of 2026-10-05)
Feb. 1, 2007 MRK P 3,000 $24.99 $74,970 6,262 Direct +91.97% Acquired 485.2% (price as of 2026-10-05)

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
Aug. 6, 2020 CENTA Stock Option (Right to Buy) Class A Common Stock (4,199) $31.76 Aug. 9, 2020 4,199 Disposed
Feb. 11, 2020 CENTA Stock Option (Right to Buy) Class A Common Stock (7,043) $28.40 Feb. 11, 2026 7,043 Acquired
Feb. 12, 2019 CENTA Stock Option (Right to Buy) Class A Common Stock (7,174) $27.88 Feb. 12, 2025 7,174 Acquired
Jan. 8, 2019 CENTA Stock Option (Right to Buy) Class A Common Stock (4,849) $13.75 Aug. 9, 2019 4,849 Disposed
Feb. 13, 2018 CENTA Stock Option (Right to Buy) Class A Common Stock (4,849) $13.75 Aug. 9, 2019 4,849 Disposed
Feb. 13, 2018 CENTA Stock Option (Right to Buy) Class A Common Stock (2,099) $31.76 Aug. 9, 2020 2,099 Disposed
Feb. 13, 2018 CENTA Stock Option (Right to Buy) Class A Common Stock (5,415) $36.94 Aug. 13, 2021 5,415 Acquired
Aug. 14, 2017 CENTA Stock Option (right to buy) Class A Common Stock (6,762) $9.86 Aug. 10, 2018 6,762 Acquired
Feb. 14, 2017 CENTA Stock Option (Right to Buy) Class A Common Stock (6,298) $31.76 Aug. 9, 2020 6,298 Acquired
Feb. 3, 2017 CENTA Stock Option (Right to Buy) Class A Common Stock (4,848) $13.75 Aug. 9, 2019 4,848 Disposed
Dec. 9, 2016 CENTA Stock Option (right to buy) Class A Common Stock (6,761) $9.86 Aug. 10, 2018 6,761 Disposed
Feb. 9, 2016 CENTA Stock Option (Right to Buy) Class A Common Stock (14,546) $13.75 Aug. 9, 2019 14,546 Acquired
Dec. 10, 2015 CENTA Stock Option (Right to Buy) Class A Common Stock (6,761) $9.86 Aug. 10, 2018 6,761 Disposed
Feb. 10, 2015 CENTA Stock Option (right to buy) Class A Common Stock (20,284) $9.86 Aug. 10, 2018 20,284 Acquired
Nov. 3, 2009 MRK Stock Units Common Shares (17,493) · · 17,493 Disposed
Nov. 3, 2009 MRK Stock Equivalent Units Common Shares (2,890) · · 2,890 Disposed
June 1, 2009 MRK Stock Units [F3] Common Shares (1,033) · · 1,033 Acquired
Dec. 1, 2008 MRK Stock Units [F3] Common Shares (1,675) · · 1,675 Acquired
May 30, 2008 MRK Stock Units [F3] Common Shares (1,121) · · 1,121 Acquired
Dec. 1, 2007 MRK Stock Units [F3] Common Shares (1,422) · · 1,422 Acquired
June 1, 2007 MRK Stock Units [F3] Common Shares (1,359) · · 1,359 Acquired
Dec. 1, 2006 MRK Stock Units [F3] Common Shares (2,022) · · 2,022 Acquired
June 1, 2006 MRK Stock Units [F3] Common Shares (2,335) · · 2,335 Acquired
May 20, 2006 MRK Stock Units [F1] Common Shares (3,000) · · 3,000 Acquired
April 1, 2006 MRK Stock Equivalent Units Common Shares (353) · · 353 Acquired
Jan. 1, 2006 MRK Stock Equivalent Units Common Shares (1,649) · · 1,649 Acquired
July 1, 2005 MRK Stock Units [F5] Common Shares (3,000) · · 3,000 Acquired
July 1, 2005 MRK Stock Equivalent Units Common Shares (765) · · 765 Acquired

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

Initial ownership (Form 3) 1 holding

07

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

DateTickerSecuritySharesOwnership
Feb. 11, 2015 CENTA No securities owned 0 Direct