John D. Walker III

CIK 1843398 · View on SEC EDGAR ↗

Insider

First SEC filing: Feb. 9, 2021 · Latest: June 17, 2026

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Insider at

Insider transactions

0 buys (P) 3 sells (S) Net: $-501,565 + 44 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

44 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Aug. 12, 2026 CENTA S 5,000 $39.00 $195,000 59,679 Direct -7.73% Disposed 0.1% (price as of 2026-08-19)
Aug. 11, 2026 CENTA S 5,000 $38.50 $192,500 64,679 Direct -7.18% Disposed 1.4% (price as of 2026-08-19)
Aug. 25, 2025 CENTA S 3,500 $32.59 $114,065 67,328 Direct -4.94% Disposed 19.8% (price as of 2026-08-19)
Feb. 10, 2025 CENTA S 10,000 $32.86 $328,600 67,111 Direct -12.97% Disposed 18.8% (price as of 2026-08-19)
May 16, 2024 CENTA S 4,218 $40.31 $170,028 85,063 Direct -4.72% Disposed -3.1% (price as of 2026-08-19)
Aug. 23, 2023 CENTA S 11,000 $41.07 $451,770 70,394 Direct -13.51% Disposed 18.8% (price as of 2026-08-19)
May 30, 2023 CENTA S 1,399 $34.75 $48,615 81,394 Direct -1.69% Disposed 40.4% (price as of 2026-08-19)
Dec. 1, 2022 CENTA S 3,400 $38.73 $131,682 88,272 Direct -3.71% Disposed 26.0% (price as of 2026-08-19)
Aug. 25, 2022 CENTA S 5,000 $40.56 $202,800 88,116 Direct -5.37% Disposed 20.3% (price as of 2026-08-19)
Feb. 25, 2022 CENTA S 2,000 $42.22 $84,440 93,116 Direct -2.10% Disposed 15.6% (price as of 2026-08-19)
Feb. 24, 2022 CENTA S 2,000 $42.26 $84,520 95,116 Direct -2.06% Disposed 15.5% (price as of 2026-08-19)
Aug. 27, 2021 CENTA S 4,500 $42.30 $190,350 97,272 Direct -4.42% Disposed 15.4% (price as of 2026-08-19)
May 24, 2021 CENTA S 6,976 $50.67 $353,474 101,772 Direct -6.41% Disposed -3.7% (price as of 2026-08-19)

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.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
June 15, 2026 CENTA Stock Option (Right to Buy) Class A Common Stock [F4] — Feb. 9, 2027 8,518 Disposed
Feb. 26, 2024 CENTA Stock Option (Right to Buy) Class A Common Stock [F7] — Feb. 10, 2026 26,316 Disposed
Feb. 26, 2024 CENTA Stock Option (Right to Buy) Class A Common Stock [F5] — Feb. 13, 2025 27,856 Disposed
Aug. 25, 2022 CENTA Stock Option (Right to Buy) Class A Common Stock (14,450) $36.70 Jan. 19, 2021 14,450 Disposed
Aug. 25, 2022 CENTA Stock Option (Right to Buy) Class A Common Stock (14,690) $30.94 Jan. 20, 2023 14,690 Disposed
May 10, 2021 CENTA Stock Option (Right to Buy) Class A Common Stock (19,500) $13.82 Jan. 29, 2022 19,500 Disposed
May 10, 2021 CENTA Stock Option (Right to Buy) Class A Common Stock (19,500) $13.82 Jan. 29, 2022 19,500 Disposed
Feb. 9, 2021 CENTA Stock Option (Right to Buy) Class A Common Stock (6,815) $44.02 Feb. 9, 2027 6,815 Acquired

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

Initial ownership (Form 3) 7 holdings

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

Date Ticker Security Shares Ownership
Feb. 9, 2021 CENTA Class A Common Stock — Direct
Feb. 9, 2021 CENTA Units - Class A Common Stock — Indirect
Feb. 9, 2021 CENTA Stock Option (Right to Buy)→ Class A Common Stock (19,500) 19,500 Direct
Feb. 9, 2021 CENTA Stock Option (Right to Buy)→ Class A Common Stock (14,690) 14,690 Direct
Feb. 9, 2021 CENTA Stock Option (Right to Buy)→ Class A Common Stock (14,450) 14,450 Direct
Feb. 9, 2021 CENTA Stock Option (Right to Buy)→ Class A Common Stock (22,285) 22,285 Direct
Feb. 9, 2021 CENTA Stock Option (Right to Buy)→ Class A Common Stock (21,053) 21,053 Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

CENTA

Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2025 $563,379 — $250,006 — — — $45,550 $858,935
2024 $550,714 — $246,966 — — — $42,745 $840,425
2023 $559,000 — $249,998 — — — $43,735 $852,733

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.