Michael R Splinter
CIK 1188935 · Executive Chairman · last filed 2026-06-12
Michael R Splinter is an Executive Chairman who has filed 66 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for NDAQ, was dated Jun 12, 2026. Across all open-market trades the lifetime net is −$33.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $401.7M across reported positions. 34 SEC filings were submitted jointly with APPLIED MATERIALS INC /DE.
"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.
AMAT 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
NEW YORK, NY 10036
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| NDAQ | Director | 233,213 | $96.12 | $22.42M | -$884.4K | 25 | 2026-06-12 |
| TYGO | Director | 582,601 | $0.89 | $518.5K | $0 | 9 | 2026-05-20 |
| TIGO ENERGY, INC. (TYGOW) Delisted | Director | 51,304 | $0.01 | $364 | $0 | 2 | 2023-08-15 |
| AMAT | Executive Chairman | 926,158 | $408.94 | $378.74M | -$32.72M | 27 | 2015-05-27 |
Recent Filings
66 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-12 | NDAQ | Grant (A) | +5,246 | $0 | EDGAR |
| 2026-05-20 | TYGO | Grant (A) | +42,988 | $0 | EDGAR |
| 2026-02-03 | NDAQ | Gift (G) | — | $0 | EDGAR |
| 2025-11-25 | TYGO | Grant (A) | +20,949 | $37.5K | EDGAR |
| 2025-08-11 | TYGO | Exer (M) | +11,668 | $7.0K | EDGAR |
| 2025-06-13 | NDAQ | Grant (A) | +5,241 | $0 | EDGAR |
| 2025-05-20 | TYGO | Grant (A) | +166,378 | $0 | EDGAR |
| 2025-01-10 | TYGO | Grant (A) | +54,069 | $0 | EDGAR |
| 2024-12-16 | TYGO | Grant (A) | +40,279 | $0 | EDGAR |
| 2024-06-13 | NDAQ | Grant (A) | +7,622 | $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.