John D. Walker III
Insider
First SEC filing: Feb. 9, 2021 · Latest: June 17, 2026
Insider at
Insider transactions
0 buys (P)
2 sells (S)
Net: $-387,500
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| 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 | -12.1% (price as of 2026-10-02) |
| Aug. 11, 2026 | CENTA | S | 5,000 | $38.50 | $192,500 | 64,679 Direct | -7.18% | Disposed | -11.0% (price as of 2026-10-02) |
| June 15, 2026 | CENTA | M | 8,518 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 15, 2026 | CENTA | F | 8,200 | $37.75 | $309,550 | 69,679 Direct | -10.53% | Disposed | -9.2% (price as of 2026-10-02) |
| June 15, 2026 | CENTA | M | 8,518 | $35.22 | $300,004 | 77,879 Direct | +12.28% | Acquired | -2.7% (price as of 2026-10-02) |
| Feb. 11, 2026 | CENTA | A | 7,813 | · | · | 69,361 Direct | -10.12% | Disposed | (price as of 2026-10-02) |
| Feb. 10, 2026 | CENTA | F | 6,437 | $33.81 | $217,635 | 61,548 Direct | -9.47% | Disposed | 1.4% (price as of 2026-10-02) |
| Feb. 6, 2026 | CENTA | F | 1,181 | $33.60 | $39,682 | 67,985 Direct | -1.71% | Disposed | 2.0% (price as of 2026-10-02) |
| Jan. 30, 2026 | CENTA | F | 976 | $30.22 | $29,495 | 69,166 Direct | -1.39% | Disposed | 13.4% (price as of 2026-10-02) |
| Jan. 30, 2026 | CENTA | A | 2,814 | · | · | 70,142 Direct | +4.18% | Acquired | (price as of 2026-10-02) |
| Aug. 25, 2025 | CENTA | S | 3,500 | $32.59 | $114,065 | 67,328 Direct | -4.94% | Disposed | 5.2% (price as of 2026-10-02) |
| Feb. 11, 2025 | CENTA | A | 3,717 | · | · | 70,828 Direct | +5.54% | Acquired | (price as of 2026-10-02) |
| Feb. 10, 2025 | CENTA | S | 10,000 | $32.86 | $328,600 | 67,111 Direct | -12.97% | Disposed | 4.3% (price as of 2026-10-02) |
| Feb. 10, 2025 | CENTA | F | 6,526 | $32.79 | $213,988 | 77,111 Direct | -7.80% | Disposed | 4.5% (price as of 2026-10-02) |
| Feb. 9, 2025 | CENTA | F | 760 | $32.79 | $24,920 | 83,637 Direct | -0.90% | Disposed | 4.5% (price as of 2026-10-02) |
| Feb. 6, 2025 | CENTA | F | 666 | $34.04 | $22,671 | 84,397 Direct | -0.78% | Disposed | 0.7% (price as of 2026-10-02) |
| May 16, 2024 | CENTA | S | 4,218 | $40.31 | $170,028 | 85,063 Direct | -4.72% | Disposed | -15.0% (price as of 2026-10-02) |
| Feb. 26, 2024 | CENTA | M | 26,316 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 26, 2024 | CENTA | M | 27,856 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 26, 2024 | CENTA | F | 20,780 | $36.86 | $765,951 | 89,281 Direct | -18.88% | Disposed | -7.0% (price as of 2026-10-02) |
| Feb. 26, 2024 | CENTA | M | 26,316 | $22.80 | $600,005 | 110,061 Direct | +31.42% | Acquired | 50.4% (price as of 2026-10-02) |
| Feb. 26, 2024 | CENTA | F | 21,562 | $36.86 | $794,775 | 83,745 Direct | -20.48% | Disposed | -7.0% (price as of 2026-10-02) |
| Feb. 26, 2024 | CENTA | M | 27,856 | $21.76 | $606,147 | 105,307 Direct | +35.97% | Acquired | 57.5% (price as of 2026-10-02) |
| Feb. 10, 2024 | CENTA | F | 9,834 | $37.09 | $364,743 | 77,451 Direct | -11.27% | Disposed | -7.6% (price as of 2026-10-02) |
| Feb. 9, 2024 | CENTA | F | 212 | $37.52 | $7,954 | 87,285 Direct | -0.24% | Disposed | -8.6% (price as of 2026-10-02) |
| Feb. 9, 2024 | CENTA | F | 560 | $37.52 | $21,011 | 87,497 Direct | -0.64% | Disposed | -8.6% (price as of 2026-10-02) |
| Feb. 6, 2024 | CENTA | A | 3,759 | · | · | 71,198 Direct | +5.57% | Acquired | (price as of 2026-10-02) |
| Dec. 4, 2023 | CENTA | F | 2,955 | $38.47 | $113,679 | 67,439 Direct | -4.20% | Disposed | 11.4% (price as of 2026-10-02) |
| Aug. 23, 2023 | CENTA | S | 11,000 | $41.07 | $451,770 | 70,394 Direct | -13.51% | Disposed | 4.3% (price as of 2026-10-02) |
| May 30, 2023 | CENTA | S | 1,399 | $34.75 | $48,615 | 81,394 Direct | -1.69% | Disposed | 23.3% (price as of 2026-10-02) |
| Feb. 10, 2023 | CENTA | F | 5,397 | $40.48 | $218,471 | 82,793 Direct | -6.12% | Disposed | 5.9% (price as of 2026-10-02) |
| Feb. 9, 2023 | CENTA | F | 202 | $41.09 | $8,300 | 88,190 Direct | -0.23% | Disposed | 4.3% (price as of 2026-10-02) |
| Feb. 6, 2023 | CENTA | A | 3,075 | · | · | 88,392 Direct | +3.60% | Acquired | (price as of 2026-10-02) |
| Dec. 4, 2022 | CENTA | F | 2,955 | $38.70 | $114,358 | 85,317 Direct | -3.35% | Disposed | 10.7% (price as of 2026-10-02) |
| Dec. 1, 2022 | CENTA | S | 3,400 | $38.73 | $131,682 | 88,272 Direct | -3.71% | Disposed | 10.6% (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | M | 14,450 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | M | 14,690 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | F | 13,403 | $40.95 | $548,853 | 91,672 Direct | -12.76% | Disposed | 4.6% (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | M | 14,450 | $36.70 | $530,315 | 105,075 Direct | +15.94% | Acquired | 16.8% (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | F | 12,181 | $40.95 | $498,812 | 90,625 Direct | -11.85% | Disposed | 4.6% (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | S | 5,000 | $40.56 | $202,800 | 88,116 Direct | -5.37% | Disposed | 5.6% (price as of 2026-10-02) |
| Aug. 25, 2022 | CENTA | M | 14,690 | $30.94 | $454,509 | 102,806 Direct | +16.67% | Acquired | 38.5% (price as of 2026-10-02) |
| Feb. 25, 2022 | CENTA | S | 2,000 | $42.22 | $84,440 | 93,116 Direct | -2.10% | Disposed | 1.5% (price as of 2026-10-02) |
| Feb. 24, 2022 | CENTA | S | 2,000 | $42.26 | $84,520 | 95,116 Direct | -2.06% | Disposed | 1.4% (price as of 2026-10-02) |
| Feb. 9, 2022 | CENTA | F | 202 | $41.95 | $8,474 | 97,116 Direct | -0.21% | Disposed | 2.1% (price as of 2026-10-02) |
| Feb. 9, 2022 | CENTA | A | 3,001 | · | · | 97,318 Direct | +3.18% | Acquired | (price as of 2026-10-02) |
| Dec. 4, 2021 | CENTA | F | 2,955 | $45.98 | $135,871 | 94,317 Direct | -3.04% | Disposed | -6.8% (price as of 2026-10-02) |
| Aug. 27, 2021 | CENTA | S | 4,500 | $42.30 | $190,350 | 97,272 Direct | -4.42% | Disposed | 1.3% (price as of 2026-10-02) |
| May 24, 2021 | CENTA | S | 6,976 | $50.67 | $353,474 | 101,772 Direct | -6.41% | Disposed | -15.4% (price as of 2026-10-02) |
| May 10, 2021 | CENTA | M | 19,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 10, 2021 | CENTA | F | 9,304 | $54.86 | $510,417 | 108,748 Direct | -7.88% | Disposed | -21.9% (price as of 2026-10-02) |
| May 10, 2021 | CENTA | M | 19,500 | $13.82 | $269,490 | 118,052 Direct | +19.79% | Acquired | 210.1% (price as of 2026-10-02) |
| May 10, 2021 | CENTA | M | 19,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 10, 2021 | CENTA | F | 10,196 | $54.86 | $559,353 | 107,856 Direct | -8.64% | Disposed | -21.9% (price as of 2026-10-02) |
| May 10, 2021 | CENTA | M | 19,500 | $13.82 | $269,490 | 118,052 Direct | +19.79% | Acquired | 210.1% (price as of 2026-10-02) |
| Feb. 9, 2021 | CENTA | A | 6,815 | · | · | 6,815 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 9, 2021 | CENTA | A | 2,272 | · | · | 98,552 Direct | +2.36% | Acquired | (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.
| 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 | $36.70 | Jan. 19, 2021 | 14,450 | Disposed |
| Aug. 25, 2022 | CENTA | Stock Option (Right to Buy) | Class A Common Stock | $30.94 | Jan. 20, 2023 | 14,690 | Disposed |
| May 10, 2021 | CENTA | Stock Option (Right to Buy) | Class A Common Stock | $13.82 | Jan. 29, 2022 | 19,500 | Disposed |
| May 10, 2021 | CENTA | Stock Option (Right to Buy) | Class A Common Stock | $13.82 | Jan. 29, 2022 | 19,500 | Disposed |
| Feb. 9, 2021 | CENTA | Stock Option (Right to Buy) | Class A Common Stock | $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) | 19,500 | Direct |
| Feb. 9, 2021 | CENTA | Stock Option (Right to Buy) | 14,690 | Direct |
| Feb. 9, 2021 | CENTA | Stock Option (Right to Buy) | 14,450 | Direct |
| Feb. 9, 2021 | CENTA | Stock Option (Right to Buy) | 22,285 | Direct |
| Feb. 9, 2021 | CENTA | Stock Option (Right to Buy) | 21,053 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| 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.