Transactions
10
Insider / MKS INC
COLELLA GERALD G
Director at MKS INC
- Company
- MKS INC
- Ticker
- MKSI
- First filing on record
- February 24, 2026
- Latest trade on record
- May 27, 2026
- SEC filings
- EDGAR ↗
COLELLA GERALD G, Director at MKS INC, has disclosed 10 transactions in MKSI since February 24, 2026: 0 purchases (0 open-market buys) and 9 sales, worth about $11.7M at the reported prices. The latest was filed May 28, 2026, 1 day after the trade.
Open-market buys
0
Sales
9
Avg. disclosure lag
1.2d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months COLELLA GERALD G made no purchases and 9 sales worth $12M, plus 1 other transaction. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
COLELLA GERALD G has traded 1 stock on record; the largest by dollars is MKSI.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 3 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| S | Open-market sale | 9 | 40,000 | $11.7M |
| A | Grant or award | 1 | 782 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 10 | 0 | 9 · $11.7M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 2,800 | $339 | $948K | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 213 | $337 | $72K | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 1,626 | $337 | $547K | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 1,811 | $335 | $608K | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 4,876 | $332 | $1.6M | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 8,210 | $331 | $2.7M | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Sell S | May 27, 2026 | May 28, 2026 | 1d | 464 | $330 | $153K | 10b5-1 planindirect | Form 4 ↗ | |
| MKSI | Other A | May 11, 2026 | May 12, 2026 | 1d | 782 | — | — | Form 4 ↗ | ||
| MKSI | Sell S | February 24, 2026 | February 24, 2026 | 0d | 10,000 | $254 | $2.5M | indirect | Form 4 ↗ | |
| MKSI | Sell S | February 20, 2026 | February 24, 2026 | 4d | 10,000 | $253 | $2.5M | indirect | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| May 28, 2026 | Form 4 | 0001049502-26-000094 | 7 | published | EDGAR ↗ |
| May 12, 2026 | Form 4 | 0001049502-26-000064 | 1 | published | EDGAR ↗ |
| February 24, 2026 | Form 4 | 0001049502-26-000049 | 2 | published | EDGAR ↗ |
Other insiders at MKS INC
- Burke Kathleen Flaherty EVP, GC & Secretary 28 rows
- Lee John Tseng-Chung President & CEO 26 rows
- Schreiner James Alan EVP & COO 21 rows
- Henry David Philip EVP, Global Str Mktg & GM, MSD 18 rows
- Taranto Eric Robert EVP & GM, VSD 18 rows
- Williams John Edward EVP & GM, PSD 16 rows
- Mayampurath Ramakumar EVP & CFO 11 rows
- McCarthy Michelle M SVP & Chief Accounting Officer 11 rows
- Moloney Jacqueline F Director 6 rows
- Mora Elizabeth Director 5 rows
Everyone on file, with contracts and lobbying under the company's name: MKS INC.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 3 | 10 | February 24, 2026 | May 28, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.