Mark W Westphal
Insider
First SEC filing: Feb. 5, 2018 · Latest: Feb. 5, 2018
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 18, 2025 | POST | A | 16,682 | · | · | 194,513 Direct | +9.38% | Acquired | (price as of 2026-10-02) |
| Nov. 18, 2025 | POST | A | 3,243 | · | · | 197,756 Direct | +1.67% | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2025 | POST | F | 2,521 | $106.70 | $268,991 | 177,831 Direct | -1.40% | Disposed | -32.0% (price as of 2026-10-02) |
| Nov. 14, 2025 | POST | F | 2,757 | $106.34 | $293,179 | 180,352 Direct | -1.51% | Disposed | -31.8% (price as of 2026-10-02) |
| Nov. 12, 2025 | POST | M | 3,097 | · | · | 181,934 Direct | +1.73% | Acquired | (price as of 2026-10-02) |
| Nov. 12, 2025 | POST | F | 1,413 | $106.02 | $149,806 | 180,521 Direct | -0.78% | Disposed | -31.6% (price as of 2026-10-02) |
| Nov. 12, 2025 | POST | M | 4,759 | · | · | 185,280 Direct | +2.64% | Acquired | (price as of 2026-10-02) |
| Nov. 12, 2025 | POST | F | 2,171 | $106.02 | $230,169 | 183,109 Direct | -1.17% | Disposed | -31.6% (price as of 2026-10-02) |
| Nov. 12, 2025 | POST | M | 3,097 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 12, 2025 | POST | M | 4,759 | · | · | 9,518 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| Oct. 22, 2025 | POST | A | 43,108 | · | · | 198,495 Direct | +27.74% | Acquired | (price as of 2026-10-02) |
| Oct. 22, 2025 | POST | F | 19,658 | $107.19 | $2,107,141 | 178,837 Direct | -9.90% | Disposed | -32.3% (price as of 2026-10-02) |
| Nov. 16, 2024 | POST | M | 6,027 | · | · | 158,136 Direct | +3.96% | Acquired | (price as of 2026-10-02) |
| Nov. 16, 2024 | POST | F | 2,749 | $106.14 | $291,779 | 155,387 Direct | -1.74% | Disposed | -31.6% (price as of 2026-10-02) |
| Nov. 16, 2024 | POST | M | 6,027 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 15, 2024 | POST | F | 2,521 | $107.78 | $271,713 | 152,109 Direct | -1.63% | Disposed | -32.7% (price as of 2026-10-02) |
| Nov. 14, 2024 | POST | F | 2,757 | $109.47 | $301,809 | 159,571 Direct | -1.70% | Disposed | -33.7% (price as of 2026-10-02) |
| Nov. 14, 2024 | POST | F | 4,941 | $109.47 | $540,891 | 154,630 Direct | -3.10% | Disposed | -33.7% (price as of 2026-10-02) |
| Nov. 13, 2024 | POST | A | 14,277 | · | · | 14,277 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2024 | POST | A | 3,097 | · | · | 3,097 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 21, 2024 | POST | A | 47,008 | · | · | 183,764 Direct | +34.37% | Acquired | (price as of 2026-10-02) |
| Oct. 21, 2024 | POST | F | 21,436 | $115.21 | $2,469,642 | 162,328 Direct | -11.66% | Disposed | -37.0% (price as of 2026-10-02) |
| Nov. 17, 2023 | POST | F | 2,940 | $84.21 | $247,577 | 130,729 Direct | -2.20% | Disposed | -13.8% (price as of 2026-10-02) |
| Nov. 16, 2023 | POST | M | 6,027 | · | · | 136,756 Direct | +4.61% | Acquired | (price as of 2026-10-02) |
| Nov. 16, 2023 | POST | M | 6,027 | · | · | 6,027 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Nov. 16, 2023 | POST | F | 2,749 | $85.39 | $234,737 | 133,669 Direct | -2.02% | Disposed | -15.0% (price as of 2026-10-02) |
| Nov. 15, 2023 | POST | F | 2,520 | $85.50 | $215,460 | 141,142 Direct | -1.75% | Disposed | -15.1% (price as of 2026-10-02) |
| Nov. 15, 2023 | POST | F | 4,724 | $85.50 | $403,902 | 136,418 Direct | -3.35% | Disposed | -15.1% (price as of 2026-10-02) |
| Nov. 14, 2023 | POST | A | 18,133 | · | · | 132,827 Direct | +15.81% | Acquired | (price as of 2026-10-02) |
| Nov. 14, 2023 | POST | A | 10,835 | · | · | 143,662 Direct | +8.16% | Acquired | (price as of 2026-10-02) |
| Oct. 24, 2023 | POST | A | 39,840 | · | · | 132,862 Direct | +42.83% | Acquired | (price as of 2026-10-02) |
| Oct. 24, 2023 | POST | F | 18,168 | $80.91 | $1,469,973 | 114,694 Direct | -13.67% | Disposed | -10.3% (price as of 2026-10-02) |
| Dec. 4, 2022 | POST | F | 8,515 | $95.75 | $815,311 | 93,022 Direct | -8.39% | Disposed | -24.2% (price as of 2026-10-02) |
| Nov. 17, 2022 | POST | F | 2,940 | $89.61 | $263,453 | 101,537 Direct | -2.81% | Disposed | -19.0% (price as of 2026-10-02) |
| Nov. 16, 2022 | POST | M | 6,026 | · | · | 107,225 Direct | +5.95% | Acquired | (price as of 2026-10-02) |
| Nov. 16, 2022 | POST | F | 2,748 | $89.57 | $246,138 | 104,477 Direct | -2.56% | Disposed | -19.0% (price as of 2026-10-02) |
| Nov. 16, 2022 | POST | M | 6,026 | · | · | 12,054 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| Nov. 15, 2022 | POST | A | 16,580 | · | · | 90,841 Direct | +22.33% | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2022 | POST | A | 10,358 | · | · | 101,199 Direct | +11.40% | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2022 | POST | F | 2,432 | $86.19 | $209,614 | 74,261 Direct | -3.17% | Disposed | -15.8% (price as of 2026-10-02) |
| Oct. 15, 2022 | POST | F | 4,814 | $86.25 | $415,208 | 76,693 Direct | -5.91% | Disposed | -15.9% (price as of 2026-10-02) |
| March 29, 2022 | POST | A | 10,557 | · | · | 81,507 Direct | +14.88% | Acquired | (price as of 2026-10-02) |
| March 10, 2022 | POST | A | 9,901 | · | · | 30,409 Direct | +48.28% | Acquired | (price as of 2026-10-02) |
| March 10, 2022 | POST | A | 11,170 | · | · | 34,306 Direct | +48.28% | Acquired | (price as of 2026-10-02) |
| March 10, 2022 | POST | A | 5,887 | · | · | 18,080 Direct | +48.28% | Acquired | (price as of 2026-10-02) |
| Nov. 17, 2021 | POST | F | 1,517 | $105.95 | $160,726 | 58,936 Direct | -2.51% | Disposed | 4.6% (price as of 2026-10-02) |
| Nov. 16, 2021 | POST | A | 12,193 | · | · | 12,193 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2021 | POST | F | 827 | $106.62 | $88,175 | 61,554 Direct | -1.33% | Disposed | 4.0% (price as of 2026-10-02) |
| Nov. 13, 2021 | POST | F | 1,101 | $106.62 | $117,389 | 60,453 Direct | -1.79% | Disposed | 4.0% (price as of 2026-10-02) |
| Dec. 1, 2020 | POST | F | 489 | $93.52 | $45,731 | 62,381 Direct | -0.78% | Disposed | 18.6% (price as of 2026-10-02) |
| Nov. 17, 2020 | POST | A | 13,043 | · | · | 62,870 Direct | +26.18% | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2020 | POST | F | 826 | $102.64 | $84,781 | 50,928 Direct | -1.60% | Disposed | 8.0% (price as of 2026-10-02) |
| Nov. 13, 2020 | POST | F | 1,101 | $102.64 | $113,007 | 49,827 Direct | -2.16% | Disposed | 8.0% (price as of 2026-10-02) |
| Aug. 21, 2020 | POST | P | 2,000 | $84.87 | $169,740 | 51,754 Direct | +4.02% | Acquired | 30.6% (price as of 2026-10-02) |
| Dec. 1, 2019 | POST | F | 489 | $105.60 | $51,638 | 49,754 Direct | -0.97% | Disposed | 5.0% (price as of 2026-10-02) |
| Nov. 16, 2019 | POST | F | 422 | $106.36 | $44,884 | 50,243 Direct | -0.83% | Disposed | 4.2% (price as of 2026-10-02) |
| Nov. 13, 2019 | POST | A | 10,788 | · | · | 51,491 Direct | +26.50% | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2019 | POST | F | 826 | $106.51 | $87,977 | 50,665 Direct | -1.60% | Disposed | 4.1% (price as of 2026-10-02) |
| Aug. 29, 2019 | POST | P | 2,000 | $98.13 | $196,260 | 40,703 Direct | +5.17% | Acquired | 13.0% (price as of 2026-10-02) |
| Dec. 1, 2018 | POST | F | 489 | $96.75 | $47,311 | 38,703 Direct | -1.25% | Disposed | 14.6% (price as of 2026-10-02) |
| Nov. 17, 2018 | POST | F | 272 | $96.05 | $26,126 | 39,192 Direct | -0.69% | Disposed | 15.4% (price as of 2026-10-02) |
| Nov. 16, 2018 | POST | F | 422 | $96.05 | $40,533 | 39,464 Direct | -1.06% | Disposed | 15.4% (price as of 2026-10-02) |
| Nov. 13, 2018 | POST | A | 8,098 | · | · | 39,886 Direct | +25.48% | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2018 | POST | A | 23,136 | · | · | 23,136 Direct | · | 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 |
|---|---|---|---|---|---|---|---|
| Nov. 12, 2025 | POST | Restricted Stock Units | Common Stock | · | · | 3,097 | Disposed |
| Nov. 12, 2025 | POST | Restricted Stock Units | Common Stock | · | · | 4,759 | Disposed |
| Nov. 16, 2024 | POST | Restricted Stock Units | Common Stock | · | · | 6,027 | Disposed |
| Nov. 13, 2024 | POST | Restricted Stock Units | Common Stock | · | · | 14,277 | Acquired |
| Nov. 13, 2024 | POST | Restricted Stock Units | Common Stock | · | · | 3,097 | Acquired |
| Nov. 16, 2023 | POST | Restricted Stock Units | Common Stock | · | Nov. 16, 2031 | 6,027 | Disposed |
| Nov. 16, 2022 | POST | Restricted Stock Units | Common Stock | · | Nov. 16, 2031 | 6,026 | Disposed |
| March 10, 2022 | POST | Employee Stock Options (right to buy) | Common Stock | · | Dec. 1, 2027 | 9,901 | Acquired |
| March 10, 2022 | POST | Employee Stock Options (right to buy) | Common Stock | · | Nov. 13, 2028 | 11,170 | Acquired |
| March 10, 2022 | POST | Restricted Stock Units | Common Stock | · | Nov. 16, 2031 | 5,887 | Acquired |
| Nov. 16, 2021 | POST | Restricted Stock Units | Common Stock | · | Nov. 16, 2031 | 12,193 | Acquired |
| Nov. 13, 2018 | POST | Employee Stock Options (right to buy) | Common Stock | $92.08 | Nov. 13, 2028 | 23,136 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.
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 |
|---|---|---|---|---|---|---|---|---|
| 2024 | $664,823 | · | · | · | $675,000 | $536,772 | $21,758 | $6,405,185 |
| 2023 | $617,123 | · | · | · | · | · | $20,858 | $5,566,738 |
| 2022 | $600,000 | · | · | · | · | · | $19,241 | $4,895,181 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.