Form 4 for CMP COMPASS MINERALS INTERNATIONAL INC
Accepted 2026-09-15 16:56:27 ET · period of report 2026-09-11 · accession 0001227654-26-000062 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-09-15 16:56 | 2026-09-11 | CMP | Tills Amy | CHRO | M - OptEx | $0.00 | +7,298 | 7,298 | New | $0 |
| D | 2026-09-15 16:56 | 2026-09-11 | CMP | Tills Amy | CHRO | F - Tax | $24.80 | -2,142 | 5,156 | -29% | -$53.1K |
| D | 2026-09-15 16:56 | 2026-09-11 | CMP | Tills Amy | CHRO | M - OptEx | $0.00 | -7,298 | 7,297 | -50% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-09-11 | M | A | 7,298 | $0.00 | 7,298 | D | — | — | |
| 2 | Common | Common Stock | 2026-09-11 | F | D | 2,142 | $24.80 | 5,156 | D | — | — | (F1) Represents the number of shares withheld to satisfy tax withholding obligations in connection with the vesting and release of the restricted stock units listed in Table II. |
| 3 | Derivative | Restricted Stock Unit | 2026-09-11 | M | D | 7,298 | $0.00 | 7,297 | D | — · — to 2027-09-11 | 7,298 Common Stock | (F2) Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. (F3) The first tranche of these restricted stock units vest on the first anniversary of the grant date. The remaining tranche will continue to vest, equally, on September 11, 2027 |