Brian Charles Quirk
Insider
First SEC filing: March 6, 2014 · Latest: March 6, 2014
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 7, 2018 | MKSI | S 10b5-1 | 2,000 | $109.40 | $218,800 | 17,641 Direct | -10.18% | Disposed | 154.4% (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 1,230 | · | · | 23,499 Direct | +5.52% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 1,230 | · | · | 4,621 Direct | -21.02% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 1,489 | · | · | 5,784 Direct | -20.47% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 2,157 | · | · | 5,851 Direct | -26.94% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 2,805 | · | · | 7,273 Direct | -27.83% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 1,773 | · | · | 8,008 Direct | -18.13% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 2,182 | · | · | 10,078 Direct | -17.80% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | A | 2,250 | · | · | 6,871 Direct | +48.69% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | A | 3,375 | · | · | 9,159 Direct | +58.35% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | F 10b5-1 | 3,858 | $111.10 | $428,624 | 19,641 Direct | -16.42% | Disposed | 150.5% (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 1,489 | · | · | 22,269 Direct | +7.17% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 2,157 | · | · | 20,780 Direct | +11.58% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 2,805 | · | · | 18,623 Direct | +17.73% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 1,773 | · | · | 15,818 Direct | +12.62% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2018 | MKSI | M | 2,182 | · | · | 14,044 Direct | +18.39% | Acquired | (price as of 2026-10-05) |
| Feb. 12, 2018 | MKSI | J | 1,071 | · | · | 12,259 Direct | -8.03% | Disposed | (price as of 2026-10-05) |
| Feb. 5, 2018 | MKSI | S 10b5-1 | 2,000 | $105.10 | $210,200 | 11,863 Direct | -14.43% | Disposed | 164.8% (price as of 2026-10-05) |
| Nov. 6, 2017 | MKSI | S 10b5-1 | 2,000 | $107.90 | $215,800 | 13,785 Direct | -12.67% | Disposed | 157.9% (price as of 2026-10-05) |
| Aug. 8, 2017 | MKSI | S 10b5-1 | 2,000 | $79.30 | $158,600 | 15,785 Direct | -11.25% | Disposed | 251.0% (price as of 2026-10-05) |
| May 11, 2017 | MKSI | M | 3,558 | · | · | 13,330 Direct | -21.07% | Disposed | (price as of 2026-10-05) |
| May 11, 2017 | MKSI | F 10b5-1 | 1,565 | $80.50 | $125,982 | 17,556 Direct | -8.18% | Disposed | 245.7% (price as of 2026-10-05) |
| May 11, 2017 | MKSI | M | 3,558 | · | · | 19,121 Direct | +22.86% | Acquired | (price as of 2026-10-05) |
| May 10, 2017 | MKSI | S 10b5-1 | 2,000 | $80.00 | $160,000 | 15,563 Direct | -11.39% | Disposed | 247.9% (price as of 2026-10-05) |
| April 3, 2017 | MKSI | S 10b5-1 | 1,000 | $68.75 | $68,750 | 17,563 Direct | -5.39% | Disposed | 304.8% (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 2,157 | · | · | 9,781 Direct | -18.07% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 2,804 | · | · | 16,888 Direct | -14.24% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 1,773 | · | · | 11,938 Direct | -12.93% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 2,181 | · | · | 19,692 Direct | -9.97% | Disposed | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | A | 3,693 | · | · | 13,711 Direct | +36.86% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | A | 5,539 | · | · | 21,873 Direct | +33.91% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | F 10b5-1 | 2,894 | $67.70 | $195,924 | 18,563 Direct | -13.49% | Disposed | 311.1% (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 2,157 | · | · | 21,457 Direct | +11.18% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 2,804 | · | · | 19,300 Direct | +17.00% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 1,773 | · | · | 16,496 Direct | +12.04% | Acquired | (price as of 2026-10-05) |
| Feb. 15, 2017 | MKSI | M | 2,181 | · | · | 14,723 Direct | +17.39% | Acquired | (price as of 2026-10-05) |
| Feb. 13, 2017 | MKSI | J | 1,294 | · | · | 16,334 Direct | -7.34% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2017 | MKSI | M | 2,009 | · | · | 10,018 Direct | -16.70% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2017 | MKSI | M | 3,013 | · | · | 17,628 Direct | -14.60% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2017 | MKSI | F 10b5-1 | 1,690 | $66.95 | $113,146 | 12,542 Direct | -11.87% | Disposed | 315.7% (price as of 2026-10-05) |
| Feb. 10, 2017 | MKSI | M | 2,009 | · | · | 14,232 Direct | +16.44% | Acquired | (price as of 2026-10-05) |
| Feb. 10, 2017 | MKSI | M | 3,013 | · | · | 12,223 Direct | +32.71% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2017 | MKSI | S 10b5-1 | 1,000 | $66.60 | $66,600 | 9,210 Direct | -9.79% | Disposed | 317.9% (price as of 2026-10-05) |
| Dec. 1, 2016 | MKSI | S 10b5-1 | 1,000 | $57.40 | $57,400 | 10,210 Direct | -8.92% | Disposed | 384.9% (price as of 2026-10-05) |
| Oct. 3, 2016 | MKSI | S 10b5-1 | 1,000 | $49.36 | $49,360 | 11,210 Direct | -8.19% | Disposed | 463.8% (price as of 2026-10-05) |
| Aug. 3, 2016 | MKSI | S 10b5-1 | 1,000 | $45.17 | $45,170 | 12,210 Direct | -7.57% | Disposed | 516.1% (price as of 2026-10-05) |
| July 5, 2016 | MKSI | A | 3,558 | · | · | 20,642 Direct | +20.83% | Acquired | (price as of 2026-10-05) |
| May 16, 2016 | MKSI | S 10b5-1 | 1,000 | $36.25 | $36,250 | 13,210 Direct | -7.04% | Disposed | 667.7% (price as of 2026-10-05) |
| March 18, 2016 | MKSI | S 10b5-1 | 1,000 | $36.00 | $36,000 | 14,210 Direct | -6.57% | Disposed | 673.1% (price as of 2026-10-05) |
| Feb. 25, 2016 | MKSI | M | 1,982 | · | · | 12,027 Direct | -14.15% | Disposed | (price as of 2026-10-05) |
| Feb. 25, 2016 | MKSI | M | 2,695 | · | · | 17,084 Direct | -13.63% | Disposed | (price as of 2026-10-05) |
| Feb. 25, 2016 | MKSI | F 10b5-1 | 1,519 | $32.77 | $49,778 | 15,210 Direct | -9.08% | Disposed | 749.3% (price as of 2026-10-05) |
| Feb. 25, 2016 | MKSI | M | 1,982 | · | · | 16,729 Direct | +13.44% | Acquired | (price as of 2026-10-05) |
| Feb. 25, 2016 | MKSI | M | 2,695 | · | · | 14,747 Direct | +22.36% | Acquired | (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | A | 6,472 | · | · | 14,009 Direct | +85.87% | Acquired | (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | A | 9,708 | · | · | 19,779 Direct | +96.40% | Acquired | (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | M | 1,773 | · | · | 7,537 Direct | -19.04% | Disposed | (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | M | 2,180 | · | · | 10,071 Direct | -17.79% | Disposed | (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | F 10b5-1 | 1,284 | $33.22 | $42,654 | 12,052 Direct | -9.63% | Disposed | 737.8% (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | M | 1,773 | · | · | 13,336 Direct | +15.33% | Acquired | (price as of 2026-10-05) |
| Feb. 16, 2016 | MKSI | M | 2,180 | · | · | 11,563 Direct | +23.23% | Acquired | (price as of 2026-10-05) |
| Feb. 10, 2016 | MKSI | M | 2,009 | · | · | 9,310 Direct | -17.75% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2016 | MKSI | M | 3,013 | · | · | 12,251 Direct | -19.74% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2016 | MKSI | F 10b5-1 | 1,741 | $32.70 | $56,931 | 9,383 Direct | -15.65% | Disposed | 751.1% (price as of 2026-10-05) |
| Feb. 10, 2016 | MKSI | M | 2,009 | · | · | 11,124 Direct | +22.04% | Acquired | (price as of 2026-10-05) |
| Feb. 10, 2016 | MKSI | M | 3,013 | · | · | 9,115 Direct | +49.38% | Acquired | (price as of 2026-10-05) |
| Jan. 28, 2016 | MKSI | S 10b5-1 | 1,000 | $36.00 | $36,000 | 6,102 Direct | -14.08% | Disposed | 673.1% (price as of 2026-10-05) |
| Jan. 26, 2016 | MKSI | J | 1,436 | · | · | 15,264 Direct | -8.60% | Disposed | (price as of 2026-10-05) |
| Dec. 16, 2015 | MKSI | S 10b5-1 | 1,000 | $36.03 | $36,030 | 7,102 Direct | -12.34% | Disposed | 672.4% (price as of 2026-10-05) |
| April 2, 2015 | MKSI | M | 2,469 | · | · | 11,319 Direct | -17.91% | Disposed | (price as of 2026-10-05) |
| April 2, 2015 | MKSI | F 10b5-1 | 803 | $33.74 | $27,093 | 8,102 Direct | -9.02% | Disposed | 724.9% (price as of 2026-10-05) |
| April 2, 2015 | MKSI | M | 2,469 | $33.74 | $83,304 | 8,905 Direct | +38.36% | Acquired | 724.9% (price as of 2026-10-05) |
| Feb. 25, 2015 | MKSI | M | 1,981 | · | · | 13,788 Direct | -12.56% | Disposed | (price as of 2026-10-05) |
| Feb. 25, 2015 | MKSI | M | 2,695 | · | · | 16,700 Direct | -13.90% | Disposed | (price as of 2026-10-05) |
| Feb. 25, 2015 | MKSI | F 10b5-1 | 1,520 | $35.83 | $54,462 | 6,436 Direct | -19.11% | Disposed | 676.7% (price as of 2026-10-05) |
| Feb. 25, 2015 | MKSI | M | 1,981 | · | · | 7,956 Direct | +33.15% | Acquired | (price as of 2026-10-05) |
| Feb. 25, 2015 | MKSI | M | 2,695 | $35.83 | $96,562 | 5,975 Direct | +82.16% | Acquired | 676.7% (price as of 2026-10-05) |
| Feb. 17, 2015 | MKSI | A | 5,319 | · | · | 15,769 Direct | +50.90% | Acquired | (price as of 2026-10-05) |
| Feb. 17, 2015 | MKSI | A | 7,979 | · | · | 19,395 Direct | +69.89% | Acquired | (price as of 2026-10-05) |
| Feb. 10, 2015 | MKSI | M | 2,008 | · | · | 10,450 Direct | -16.12% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2015 | MKSI | M | 3,013 | · | · | 11,416 Direct | -20.88% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2015 | MKSI | F 10b5-1 | 1,741 | $35.86 | $62,432 | 3,280 Direct | -34.67% | Disposed | 676.1% (price as of 2026-10-05) |
| Feb. 10, 2015 | MKSI | M | 2,008 | · | · | 5,021 Direct | +66.64% | Acquired | (price as of 2026-10-05) |
| Feb. 10, 2015 | MKSI | M | 3,013 | · | · | 3,013 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2015 | MKSI | S 10b5-1 | 1,041 | $36.09 | $37,570 | 1 Direct | -99.90% | Disposed | 671.1% (price as of 2026-10-05) |
| Jan. 23, 2015 | MKSI | S 10b5-1 | 1,040 | $34.76 | $36,150 | 1,042 Direct | -49.95% | Disposed | 700.6% (price as of 2026-10-05) |
| Jan. 16, 2015 | MKSI | S 10b5-1 | 1,040 | $33.10 | $34,424 | 2,082 Direct | -33.31% | Disposed | 740.8% (price as of 2026-10-05) |
| Dec. 12, 2014 | MKSI | S 10b5-1 | 1,041 | $35.97 | $37,445 | 3,122 Direct | -25.01% | Disposed | 673.7% (price as of 2026-10-05) |
| Dec. 5, 2014 | MKSI | S 10b5-1 | 1,040 | $36.17 | $37,617 | 4,163 Direct | -19.99% | Disposed | 669.4% (price as of 2026-10-05) |
| Nov. 21, 2014 | MKSI | S 10b5-1 | 1,040 | $36.30 | $37,752 | 5,203 Direct | -16.66% | Disposed | 666.7% (price as of 2026-10-05) |
| April 11, 2014 | MKSI | M | 2,113 | · | · | 12,458 Direct | -14.50% | Disposed | (price as of 2026-10-05) |
| April 11, 2014 | MKSI | F 10b5-1 | 688 | $28.00 | $19,264 | 6,243 Direct | -9.93% | Disposed | 893.9% (price as of 2026-10-05) |
| April 11, 2014 | MKSI | M | 2,113 | · | · | 6,931 Direct | +43.86% | Acquired | (price as of 2026-10-05) |
| April 2, 2014 | MKSI | M | 2,469 | · | · | 14,571 Direct | -14.49% | Disposed | (price as of 2026-10-05) |
| April 2, 2014 | MKSI | F 10b5-1 | 804 | $30.70 | $24,683 | 4,818 Direct | -14.30% | Disposed | 806.5% (price as of 2026-10-05) |
| April 2, 2014 | MKSI | M | 2,469 | · | · | 5,622 Direct | +78.31% | Acquired | (price as of 2026-10-05) |
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. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,230 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,489 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,157 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,805 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,773 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,182 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,250 | Acquired |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,375 | Acquired |
| Feb. 12, 2018 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,071 | Disposed |
| May 11, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,558 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,157 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,804 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,773 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,181 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,693 | Acquired |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 5,539 | Acquired |
| Feb. 13, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,294 | Disposed |
| Feb. 10, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,009 | Disposed |
| Feb. 10, 2017 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,013 | Disposed |
| July 5, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,558 | Acquired |
| Feb. 25, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,982 | Disposed |
| Feb. 25, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,695 | Disposed |
| Feb. 16, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 6,472 | Acquired |
| Feb. 16, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 9,708 | Acquired |
| Feb. 16, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,773 | Disposed |
| Feb. 16, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,180 | Disposed |
| Feb. 10, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,009 | Disposed |
| Feb. 10, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,013 | Disposed |
| Jan. 26, 2016 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,436 | Disposed |
| April 2, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,469 | Disposed |
| Feb. 25, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 1,981 | Disposed |
| Feb. 25, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,695 | Disposed |
| Feb. 17, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 5,319 | Acquired |
| Feb. 17, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 7,979 | Acquired |
| Feb. 10, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,008 | Disposed |
| Feb. 10, 2015 | MKSI | Restricted Stock Unit | Common Stock | · | · | 3,013 | Disposed |
| April 11, 2014 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,113 | Disposed |
| April 2, 2014 | MKSI | Restricted Stock Unit | Common Stock | · | · | 2,469 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2016 | $362,004 | · | · | · | $309,296 | · | $63,702 | $1,315,002 |
| 2015 | $339,423 | · | · | · | $212,818 | · | $61,769 | $989,010 |
| 2014 | $323,923 | · | · | · | $222,697 | · | $60,796 | $957,416 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.