DAVID BRIAN MILLER

CIK 1233488 · last filed 2026-05-22

"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

$3.25M

Companies

3

Total Filings

22

Lifetime Open-Market Net

-$1.64M

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
ONTO Director 12,692 $256.37 $3.25M -$1.51M 12 2026-05-22
RUDOLPH TECHNOLOGIES INC (RTEC) Delisted Director 21,400 -$125.2K 6 2019-05-15
MRM Director $0.93 $0 1 2007-06-21

Recent Filings · Page 3 of 3

22 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
2015-07-30 RUDOLPH TECHNOLOGIES INC (RTEC) Delisted Grant (A) +7,700 $0 EDGAR
2007-06-21 MRM Grant (A) $0 EDGAR
Showing 2122 of 22
Page 3 of 3
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.