Sanat Chattopadhyay
CIK 1670690 · Exe V-P & Pres. MMD · last filed 2026-10-01
Sanat Chattopadhyay is an Exe V-P & Pres. MMD who has filed 49 SEC Form 4 insider transactions across 2 companies since 2016. The most recent filing, for ASH, was dated Oct 1, 2026. Across all open-market trades the lifetime net is −$45.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.7M across reported positions. 35 SEC filings were submitted jointly with Merck & Co., Inc.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
MRK price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
P.O. BOX 2000
RAHWAY, NJ 07065
Holdings By Company
Recent Filings
49 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-10-01 | ASH | Grant (A) | — | $0 | EDGAR |
| 2026-07-01 | ASH | Grant (A) | — | $0 | EDGAR |
| 2026-05-01 | MRK | Mixed | +1,467 | $161.4K | EDGAR |
| 2026-04-01 | ASH | Grant (A) | — | $0 | EDGAR |
| 2026-01-28 | MRK | Grant (A) | +13,880 | $1.49M | EDGAR |
| 2026-01-21 | ASH | Grant (A) | — | $0 | EDGAR |
| 2026-01-05 | ASH | Grant (A) | — | $0 | EDGAR |
| 2025-10-02 | ASH | Grant (A) | — | $0 | EDGAR |
| 2025-07-02 | ASH | Grant (A) | — | $0 | EDGAR |
| 2025-05-01 | MRK | Grant (A) | — | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.