Updated Jul 16, 2026
DONNELLY WILLIAM P has filed 3 SEC Form 4 filings across 2 companies in the last 90 days — buying. Lifetime open-market purchases: $506K.
William P. Donnelly is an executive known for his role as Executive Chair at Quanterix Corp, a life sciences company specializing in ultra-sensitive digital immunoassay platforms. He has also been associated with other companies such as Price T Rowe Group Inc and Ingersoll Rand Inc.
| Role | Insider |
|---|---|
| Notability | 30/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-02 | QTRX | Quanterix Corp | A — Grant or award | 5.5K | $4.34 | $24K |
| 2026-07-01 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 576 | $0.00 | |
| 2026-07-01 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 142 | $114.38 | $16K |
| 2026-05-11 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 1.9K | $0.00 | |
| 2026-04-07 | QTRX | Quanterix Corp | A — Grant or award | 6.2K | $0.00 | |
| 2026-03-31 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 152 | $89.03 | $14K |
| 2026-03-03 | IR | Ingersoll Rand Inc. | M — Option exercise | 3.0K | — | |
| 2025-10-01 | QTRX | Quanterix Corp | A — Grant or award | 5.1K | $5.54 | $28K |
| 2025-09-29 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 117 | $103.52 | $12K |
| 2025-07-01 | QTRX | Quanterix Corp | A — Grant or award | 4.2K | $6.69 | $28K |
| 2025-06-27 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 670 | $0.00 | |
| 2025-06-27 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 116 | $96.10 | $11K |
| 2025-06-06 | QTRX | Quanterix Corp | P — Open-market purchase | 93.1K | $5.44 | $506K |
| 2025-05-09 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 2.2K | $0.00 | |
| 2025-04-01 | QTRX | Quanterix Corp | A — Grant or award | 2.7K | $6.67 | $18K |
| 2024-12-31 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 541 | $0.00 | |
| 2024-12-31 | TROW | PRICE T ROWE GROUP INC | A — Grant or award | 63 | $115.67 | $7K |
| 2024-12-06 | IR | Ingersoll Rand Inc. | G — Bona-fide gift | 14.9K | $0.00 | |
| 2024-10-02 | QTRX | Quanterix Corp | A — Grant or award | 1.0K | $12.50 | $12K |
William P. Donnelly is an executive known for his role as Executive Chair at Quanterix Corp, a life sciences company specializing in ultra-sensitive digital immunoassay platforms. He has also been associated with other companies such as Price T Rowe Group Inc and Ingersoll Rand Inc.…
3 primary Form 4 filings in the last 90 days, covering 2 companies.
Recorded transactions: 1 open-market purchases ($506K) and 0 open-market sales () across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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