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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 $432.6M across reported positions.

"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.

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Disclosed Exposure

$432.59M

Companies

4

Total Filings

66

Lifetime Open-Market Net

-$33.61M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
NDAQ Director 233,213 $97.54 $22.75M -$884.4K 25 2026-06-12
TYGO Director 582,601 $1.06 $617.6K $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 $441.85 $409.22M -$32.72M 27 2015-05-27

Recent Filings

66 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
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
Showing 1–10 of 66
Page 1 of 7
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.