Mark D Papermaster
CIK 1449649 · Chief Technology Officer & EVP · last filed 2026-08-21
Mark D Papermaster is a Chief Technology Officer & EVP who has filed 160 SEC Form 4 insider transactions across 3 companies since 2009. The most recent filing, for AMD, was dated Aug 21, 2026. Across all open-market trades the lifetime net is −$241.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $802.1M across reported positions. 154 SEC filings were submitted jointly with ADVANCED MICRO DEVICES 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.
AMD 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
C/O ADVANCED MICRO DEVICES, INC.
SANTA CLARA, CA 95054
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AMD | Chief Technology Officer & EVP | 1,468,517 | $528.75 | $776.48M | -$239.14M | 123 | 2026-08-21 |
| Penguin Solutions, Inc. (SGH) Delisted | Director | 34,816 | $20.85 | $725.9K | $0 | 4 | 2026-02-10 |
| AAPL | Senior Vice President | 74,480 | $343.46 | $25.58M | -$2.16M | 4 | 2010-08-05 |
Recent Filings
160 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-21 | AMD | Mixed | −53,863 | -$13.60M | EDGAR |
| 2026-08-20 | AMD | Notice (144) | −28,811 | -$13.59M | EDGAR |
| 2026-08-18 | AMD | Mixed | +73,977 | -$27.66M | EDGAR |
| 2026-08-14 | AMD | Notice (144) | −7,369 | -$3.59M | EDGAR |
| 2026-08-11 | AMD | Mixed | +7,660 | -$2.40M | EDGAR |
| 2026-07-17 | AMD | Mixed | — | -$2.83M | EDGAR |
| 2026-07-15 | AMD | Notice (144) | −6,000 | -$3.34M | EDGAR |
| 2026-06-17 | AMD | Mixed | — | -$2.71M | EDGAR |
| 2026-06-15 | AMD | Notice (144) | −6,000 | -$3.22M | EDGAR |
| 2026-05-19 | AMD | Mixed | — | -$2.09M | 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.