12 transactions on file (3 open-market purchases and 0 open-market sales).
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-07 | DAMELIO FRANK A Director Gift | Gift | −6,650 | $0.00 | −0 | 14,808 |
| 2026-06-10 | MCCALLISTER MICHAEL B Director Gift | Gift | −1,209 | $0.00 | −0 | 0 |
| 2026-05-21 | Stetter Mark Director Option exercise | Option exercise | +1,572 | - | - | 1,572 |
| 2026-05-20 | PARENT LOUISE M Director Option exercise | Option exercise | +1,944 | - | - | 18,208 |
| 2026-05-20 | PARENT LOUISE M Director Option exercise | Option exercise | +10,186 | - | - | 28,394 |
7 more transactions are on Measure
| Insider | Role | On Sep 12, 2025 | Now | Change | Sold | Shape |
|---|---|---|---|---|---|---|
| Bisaro PaulDirector | Director | 25,862 | 27,862 | +7.73% | - | |
| MCCALLISTER MICHAEL BDirector | Director | 21,524 | 24,524 | +13.94% | - | |
| DAMELIO FRANK ADirector | Director | 14,808 | 21,458 | +44.91% | - |
Each person’s holding as they reported it after each open-market trade, over the last twelve months. It counts one class of stock and excludes grants, option exercises and shares withheld for tax, so a stake can fall here while somebody’s total holding does not. Since April 2023 a Form 4 states whether a trade ran under a pre-arranged 10b5-1 plan; an older one does not, and those dollars read “not stated” rather than being counted either way.
The assistant answers from what ZTS has actually filed: 15 annual reports filed with the SEC, 12 Form 4 filings from the last year, 13F positions from the 5 tracked investors who hold it and 6 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
Pressing one answers it here, from ZTS's filings and figures. One a day without an account; a free account has its own, and no card.
See every Form 4 ZTS insiders have filed, not the latest few.
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Source
From SEC Form 4 filings, filed by officers, directors and 10%-owners within two business days of a transaction. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.
Past transactions say nothing about future ones, and none of this is investment advice.
See who bought, not who was handed shares
Every Form 4 ZTS insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
Follow the investors who hold it
Each stake priced at the quarter it was filed, and diffed against the quarter before: who added, who trimmed, who left.
Every position they holdMeasure
Ask what a run of filings adds up to
Whether this is one decision or a pattern, and how it compares with ZTS's own history of insider activity.
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