David Philip Henry

CIK 1842459 · View on SEC EDGAR ↗

Insider

First SEC filing: Feb. 9, 2021 · Latest: June 2, 2026

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Insider transactions

0 buys (P) 4 sells (S) Net: $-3,885,950 + 81 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

81 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
June 1, 2026 MKSI S 6,000 $314.43 $1,886,580 10,422 Direct -36.54% Disposed -12.2% (price as of 2026-08-20)
May 26, 2026 MKSI S 10b5-1 2,500 $330.50 $826,250 16,341 Direct -13.27% Disposed -16.5% (price as of 2026-08-20)
Feb. 20, 2026 MKSI S 2,000 $261.56 $523,120 18,841 Direct -9.60% Disposed 5.5% (price as of 2026-08-20)
Sept. 18, 2025 MKSI S 10b5-1 5,000 $130.00 $650,000 15,571 Direct -24.31% Disposed 112.3% (price as of 2026-08-20)
July 3, 2025 MKSI S 10b5-1 2,000 $105.00 $210,000 20,571 Direct -8.86% Disposed 162.8% (price as of 2026-08-20)
Nov. 7, 2023 MKSI P 2,500 $68.34 $170,850 11,073 Direct +29.16% Acquired 303.8% (price as of 2026-08-20)
May 20, 2021 MKSI S 284 $186.70 $53,023 1,806 Direct -13.59% Disposed 47.8% (price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (2,054) — — 2,054 Disposed
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (1,841) — — 1,841 Disposed
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (1,278) — — 1,278 Disposed
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (456) — — 456 Disposed
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (1,247) — — 1,247 Disposed
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (2,406) — — 2,406 Disposed
Feb. 17, 2026 MKSI Restricted Stock Unit Common Stock (2,567) — — 2,567 Acquired
Feb. 8, 2026 MKSI Restricted Stock Unit Common Stock (5,522) — — 5,522 Acquired
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (1,278) — — 1,278 Disposed
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (456) — — 456 Disposed
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (1,246) — — 1,246 Disposed
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (2,406) — — 2,406 Disposed
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (1,099) — — 1,099 Disposed
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (1,528) — — 1,528 Disposed
Feb. 18, 2025 MKSI Restricted Stock Unit Common Stock (6,163) — — 6,163 Acquired
Feb. 10, 2025 MKSI Restricted Stock Unit Common Stock (1,369) — — 1,369 Acquired
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (2,405) — — 2,405 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (1,246) — — 1,246 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (1,100) — — 1,100 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (1,528) — — 1,528 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (581) — — 581 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (1,162) — — 1,162 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (3,835) — — 3,835 Acquired
Feb. 5, 2024 MKSI Restricted Stock Unit Common Stock (7,217) — — 7,217 Acquired
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (1,098) — — 1,098 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (1,527) — — 1,527 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (581) — — 581 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (1,161) — — 1,161 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (1,172) — — 1,172 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (3,739) — — 3,739 Acquired
Feb. 8, 2023 MKSI Restricted Stock Unit Common Stock (4,583) — — 4,583 Acquired
Aug. 17, 2022 MKSI Restricted Stock Unit Common Stock (227) — — 227 Acquired
April 29, 2022 MKSI Restricted Stock Unit Common Stock (3,071) — — 3,071 Acquired
April 18, 2022 MKSI Restricted Stock Unit Common Stock (479) — — 479 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (580) — — 580 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (1,161) — — 1,161 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (1,171) — — 1,171 Disposed
Jan. 21, 2022 MKSI Restricted Stock Unit Common Stock (3,484) — — 3,484 Acquired
April 15, 2021 MKSI Restricted Stock Unit Common Stock (479) — — 479 Disposed
April 13, 2021 MKSI Restricted Stock Unit Common Stock (356) — — 356 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (1,170) — — 1,170 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (1,742) — — 1,742 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 4 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date Ticker Security Shares Ownership
Feb. 9, 2021 MKSI Common Stock 674 Direct
Feb. 9, 2021 MKSI Restricted Stock Unit→ Common Stock (356) 356 Direct
Feb. 9, 2021 MKSI Restricted Stock Unit→ Common Stock (958) 958 Direct
Feb. 9, 2021 MKSI Restricted Stock Unit→ Common Stock (3,513) 3,513 Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MKSI

EVP, Operations and Corporate Marketing
Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2024 $455,738 — — — $88,869 — $36,498 $1,572,913
2023 $450,000 — — — $251,550 — $35,403 $1,474,464
2022 $442,604 — — — $283,116 — $33,047 $1,497,499

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.