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Matthew Charles Brown

CIK 1766979 · Chief Financial Officer · last filed 2026-05-26

Matthew Charles Brown is a Chief Financial Officer who has filed 43 SEC Form 4 insider transactions across 3 companies since 2019. The most recent filing, for TENB, was dated May 26, 2026. Across all open-market trades the lifetime net is −$2.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.3M 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

$1.28M

Companies

3

Total Filings

43

Lifetime Open-Market Net

-$1.96M

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
TENB Chief Financial Officer 39,866 $32.04 $1.28M $258.5K 6 2026-05-26
Altair Engineering Inc. (ALTR) Delisted Chief Financial Officer 0 $111.85 $0 -$1.43M 22 2025-03-26
Gen Digital Inc. (NLOK) Delisted CAO 114,675 $21.66 $2.48M -$783.2K 6 2020-08-18

Recent Filings

43 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
2026-05-26 TENB Mixed +9,325 -$131.4K EDGAR
2026-05-05 TENB Buy (P) +12,000 $258.5K EDGAR
2026-02-27 TENB Grant (A) — $0 EDGAR
2026-02-25 TENB Mixed +9,275 -$92.5K EDGAR
2025-11-25 TENB Mixed +9,266 -$137.5K EDGAR
2025-08-25 TENB Grant (A) — $0 EDGAR
2025-03-26 Altair Engineering Inc. (ALTR) Delisted Disp (D) −66,125 -$7.47M EDGAR
2025-03-06 Altair Engineering Inc. (ALTR) Delisted Gift (G) −2,527 $0 EDGAR
2025-03-05 Altair Engineering Inc. (ALTR) Delisted Sell (S) −742 -$82.7K EDGAR
2025-03-03 — Notice (144) −739 -$82.5K EDGAR
Showing 1–10 of 43
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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.