Kathleen Flaherty Burke
CIK 1775435 · EVP, GC & Secretary · last filed 2026-05-12
Kathleen Flaherty Burke is an EVP, GC & Secretary who has filed 24 SEC Form 4 insider transactions across 1 company since 2019. The most recent filing shows the insider sold $1.4M of MKSI on May 12, 2026. Across all open-market trades the lifetime net is −$5.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $17.6M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$17.59M
1
24
-$5.69M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MKSI | EVP, GC & Secretary | 49,439 | $355.69 | $17.59M | -$5.69M | 24 | 2026-05-12 |
Recent Filings
24 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-12 | MKSI | Sell (S) | −4,355 | -$1.39M | EDGAR |
| 2026-02-23 | MKSI | Sell (S) | −4,254 | -$1.06M | EDGAR |
| 2026-02-18 | MKSI | Mixed | +6,888 | -$1.39M | EDGAR |
| 2026-02-09 | MKSI | Grant (A) | — | $0 | EDGAR |
| 2025-11-04 | MKSI | Mixed | — | -$111.7K | EDGAR |
| 2025-02-19 | MKSI | Mixed | +7,675 | -$411.6K | EDGAR |
| 2025-02-11 | MKSI | Grant (A) | — | $0 | EDGAR |
| 2024-03-04 | MKSI | Sell (S) | −7,411 | -$910.7K | EDGAR |
| 2024-02-16 | MKSI | Mixed | +7,546 | -$600.0K | EDGAR |
| 2024-02-06 | MKSI | Grant (A) | — | $0 | EDGAR |