WALT DAVID R — SEC Form 4 filings
SEC reporting owner CIK 1205236. 8 Form 4 filings on record with FilingPulse; latest filed 2026-01-06.
Transaction summary — filings shown
Covers all 8 filings on record, filed 2024-09-17 to 2026-01-06. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 5 legs across 3 filings — 417,000 shares, $2,743,394 total (shares × price as filed).
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 8.
- Largest priced transaction: purchase of 123,990 shares @ $6.14 ($760,803) in Quanterix Corp, filed 2025-06-13.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Quanterix Corp (QTRX) | Director | 8 | 5 legs · 417,000 sh · $2,743,394 | — | 8 |
Form 4 filings — WALT DAVID R
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-01-06 | 4 | Quanterix Corp (QTRX) | Grant/award (A): 1,215 @ $0 | EDGAR |
| 2025-10-03 | 4 | Quanterix Corp (QTRX) | Grant/award (A): 2,594 @ $5.54 | EDGAR |
| 2025-07-02 | 4 | Quanterix Corp (QTRX) | Grant/award (A): 2,148 @ $6.69 | EDGAR |
| 2025-06-13 | 4 | Quanterix Corp (QTRX) | Purchase (P): 36,010 @ $6.23 · Purchase (P): 123,990 @ $6.14 | EDGAR |
| 2025-06-09 | 4 | Quanterix Corp (QTRX) | Purchase (P): 131,869 @ $5.43 · Purchase (P): 78,131 @ $5.34 | EDGAR |
| 2025-04-03 | 4 | Quanterix Corp (QTRX) | Grant/award (A): 2,156 @ $6.67 | EDGAR |
| 2025-01-06 | 4 | Quanterix Corp (QTRX) | Grant/award (A): 7,435 @ $0 · Grant/award (A): 15,821 (derivative) @ $0 | EDGAR |
| 2024-09-17 | 4 | Quanterix Corp (QTRX) | Gift (G): 1,000 @ $0 · Gift (G): 1,000 @ $0 · Purchase (P): 47,000 @ $13.29 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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