Insider trading

Period: 120 months Stock: MKSI Role: Other officers × + Add filter Clear all
Views & alerts

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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

46 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

46 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

46 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

46 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
46 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
46 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

46 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
3 Aug 2026
Williams John Edward EVP & GM, PSD
Sold on a plan
$131.76K 457 at 288.31
10.0%
Planned (10b5-1)
12 Jun 2026
Sold at will 3×
$1.21M 3,500 at 345.82
15.4%
Not planned
10 Jun 2026
Sold on a plan
$247.91K 781 at 317.42
3.3%
Planned (10b5-1)
5 Jun 2026
McCarthy Michelle M SVP & Chief Accounting Officer
Sold on a plan
$767.27K 2,434 at 315.23
99.9%
Sold half or more
1 Jun 2026
Henry David Philip EVP, Global Str Mktg & GM, MSD
Sold at will
$1.89M 6,000 at 314.43
36.5%
Not planned
26 May 2026
Henry David Philip EVP, Global Str Mktg & GM, MSD
Sold on a plan
$826.25K 2,500 at 330.50
13.3%
Planned (10b5-1)
11 May 2026
Burke Kathleen Flaherty EVP, GC & Secretary
Sold at will
$1.39M 4,355 at 319.94
8.1%
Not planned
11 May 2026
Taranto Eric Robert EVP & GM, VSD
Sold at will
$911.33K 2,849 at 319.93
18.4%
Not planned
6 Mar 2026
Taranto Eric Robert EVP & GM, VSD
Sold at will
$1.01M 4,568 at 220.52
22.8%
Not planned
24 Feb 2026
Sold at will
$1.05M 4,100 at 255.00
14.9%
Not planned
20 Feb 2026
Burke Kathleen Flaherty EVP, GC & Secretary
Sold at will
$1.06M 4,254 at 250.00
7.3%
Not planned
20 Feb 2026
Williams John Edward EVP & GM, PSD
Sold at will
$523.74K 2,043 at 256.41
35.9%
Not planned
20 Feb 2026
Henry David Philip EVP, Global Str Mktg & GM, MSD
Sold at will
$523.12K 2,000 at 261.56
9.6%
Not planned
20 Feb 2026
McCarthy Michelle M VP & Chief Accounting Officer
Sold at will 2×
$366.50K 1,466 at 250.00
100%
Sold half or more
20 Feb 2026
Taranto Eric Robert EVP & GM, VSD
Sold at will
$359.62K 1,453 at 247.55
6.8%
Not planned
22 Oct 2025
Sold on a plan
$98.60K 711 at 138.68
3.1%
Planned (10b5-1)
18 Sep 2025
Henry David Philip EVP, Global Str Mktg & GM, MSD
Sold on a plan
$650.00K 5,000 at 130.00
24.3%
Planned (10b5-1)
18 Sep 2025
Sold on a plan
$103.91K 838 at 124.00
3.5%
Planned (10b5-1)
7 Jul 2025
Schreiner James Alan EVP & COO, MSD
Sold on a plan
$98.04K 957 at 102.44
4.0%
Planned (10b5-1)
3 Jul 2025
Henry David Philip EVP, Operations & Corp Mktg
Sold on a plan
$210.00K 2,000 at 105.00
8.9%
Planned (10b5-1)
16 Aug 2024
Williams John Edward EVP & GM, PSD
Sold at will
$213.68K 1,800 at 118.71
99.3%
Sold half or more
1 Mar 2024
Burke Kathleen Flaherty EVP, GC & Secretary
Sold at will
$910.74K 7,411 at 122.89
14.7%
Not planned
7 Nov 2023
Henry David Philip EVP, Operations & Corp Mktg
Bought
$170.86K 2,500 at 68.34
29.2%
First buy on file
7 Aug 2023
Burke Kathleen Flaherty EVP, GC & Secretary
Sold at will 2×
$1.17M 11,563 at 101.23
21.3%
Not planned
20 May 2021
Henry David Philip SVP, Corp Mkt, PMO & Glob Svc
Sold, plan not stated
$53.02K 284 at 186.70
13.6%
30 Apr 2021
Gitin Mark Milton SVP & GM, L&M Division
Sold, plan not stated
$236.51K 1,301 at 181.79
23.1%
29 Apr 2021
Taranto Eric Robert SVP & GM, V&A Division
Sold, plan not stated
$331.30K 1,788 at 185.29
33.8%
30 Oct 2019
Burke Kathleen Flaherty Sr. VP, GC & Secretary
Sold, plan not stated
$1.15M 10,384 at 110.55
26.5%
6 Jun 2018
Abrams John R Sr. VP, Global Sales
Sold, plan not stated
$15.66K 133 at 117.77
100%
Sold half or more
7 May 2018
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$218.80K 2,000 at 109.40
10.2%
21 Feb 2018
Abrams John R Sr. VP, Global Sales & Service
Sold, plan not stated
$1.13M 9,831 at 114.94
100.0%
Sold half or more
20 Feb 2018
Lee John Tseng-Chung Sr. VP & COO
Sold, plan not stated 2×
$1.55M 13,432 at 115.38
100.0%
Sold half or more
5 Feb 2018
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$210.20K 2,000 at 105.10
14.4%
15 Dec 2017
Werth Dennis L Sr. VP, Business Units
Sold, plan not stated
$197.95K 2,022 at 97.90
34.2%
14 Dec 2017
Werth Dennis L Sr. VP, Business Units
Sold, plan not stated
$154.61K 1,617 at 95.62
38.5%
13 Nov 2017
Lee John Tseng-Chung Sr. VP & COO
Sold, plan not stated
$219.78K 2,113 at 104.02
100.0%
Sold half or more
6 Nov 2017
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$215.80K 2,000 at 107.90
12.7%
8 Aug 2017
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$158.60K 2,000 at 79.30
11.2%
10 May 2017
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$160.00K 2,000 at 80.00
11.4%
3 Apr 2017
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$68.75K 1,000 at 68.75
5.4%
14 Mar 2017
Abrams John R Sr. VP, Global Sales & Service
Sold, plan not stated
$809.54K 12,066 at 67.09
100.0%
Sold half or more
22 Feb 2017
Lee John Tseng-Chung Sr. VP & COO
Sold, plan not stated
$1.00M 14,734 at 67.99
100.0%
Sold half or more
1 Feb 2017
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$66.60K 1,000 at 66.60
9.8%
2 Dec 2016
Abrams John R Sr. VP, Global Sales & Service
Sold, plan not stated
$16.32K 302 at 54.05
5.8%
1 Dec 2016
Quirk Brian Charles Sr. VP, Global Operations
Sold, plan not stated
$57.40K 1,000 at 57.40
8.9%
17 Nov 2016
Werth Dennis L Sr. VP, Business Units
Sold, plan not stated
$131.60K 2,333 at 56.41
100%
Sold half or more
Showing 1–46 of 46.