Insider trading

Period: 120 months Stock: MKSI Plan: Discretionary × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

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

32 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.

32 decisions over 120 months
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.

32 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.

32 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.
32 decisions over 120 months Remove this filter
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
32 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.

32 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
12 Jun 2026
Sold at will 3×
$1.21M 3,500 at 345.82
15.4%
Not planned
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
27 May 2026
Donahue Joseph B Director
Sold at will
$688.70K 2,100 at 327.95
17.3%
Not planned
18 May 2026
Sold at will
$409.59K 1,350 at 303.40
14.8%
Not planned
14 May 2026
Sold at will
$312.20K 1,000 at 312.20
10.2%
Not planned
13 May 2026
Sold at will
$446.59K 1,400 at 318.99
12.5%
Not planned
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
12 Mar 2026
Sold at will
$72.71K 340 at 213.77
3.2%
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
COLELLA GERALD G Director · indirect
Sold at will
$2.54M 10,000 at 253.97
20.0%
Not planned
24 Feb 2026
Sold at will
$1.05M 4,100 at 255.00
14.9%
Not planned
20 Feb 2026
Lee John Tseng-Chung President & CEO
Sold at will 4×
$7.70M 30,000 at 256.77
16.2%
Not planned
20 Feb 2026
COLELLA GERALD G Director · indirect
Sold at will
$2.53M 10,000 at 252.90
16.7%
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
20 Feb 2026
Sold at will
$322.57K 1,250 at 258.06
13.0%
Not planned
20 Feb 2026
Sold at will
$205.22K 829 at 247.55
7.2%
Not planned
18 Feb 2025
COLELLA GERALD G Director · indirect
Sold at will
$836.22K 8,000 at 104.53
11.8%
Not planned
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
22 Feb 2024
BAGSHAW SETH H EVP, CFO & Treasurer
Sold at will 3×
$4.05M 32,865 at 123.28
100.0%
Sold half or more
16 Feb 2024
Sold at will
$237.93K 1,917 at 124.10
16.9%
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
6 Sep 2023
BAGSHAW SETH H EVP, CFO & Treasurer
Sold at will 2×
$2.43M 25,000 at 97.30
54.9%
Sold half or more
28 Aug 2023
Sold at will
$23.81K 250 at 95.26
2.1%
Not planned
7 Aug 2023
Burke Kathleen Flaherty EVP, GC & Secretary
Sold at will 2×
$1.17M 11,563 at 101.23
21.3%
Not planned
8 May 2023
Sold at will
$172.25M 2,000,000 at 86.13
23.6%
Not planned
8 May 2023
Carlyle Group Inc. 10% owner · indirect
Sold at will
$172.25M 2,000,000 at 86.13
23.6%
Not planned
Showing 1–32 of 32.