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Richard W. Brissenden

CIK 1540320 · last filed 2026-07-01

Richard W. Brissenden is a corporate insider who has filed 19 SEC Form 4 insider transactions across 1 company since 2012. The most recent filing, for MUX, was dated Jul 1, 2026. Across all open-market trades the lifetime net is −$533.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $365.5K 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

$365.5K

Companies

1

Total Filings

19

Lifetime Open-Market Net

-$533.1K

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
MUX Director 21,297 $17.16 $365.5K -$533.1K 19 2026-07-01

Recent Filings

19 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
2026-07-01 MUX Mixed +5,058 -$208 EDGAR
2025-09-24 MUX Mixed +4,631 -$98.2K EDGAR
2025-08-13 MUX Grant (A) — $0 EDGAR
2025-01-02 MUX Exer (M) +8,333 $59.2K EDGAR
2020-10-01 MUX Grant (A) — $0 EDGAR
2019-08-13 MUX Mixed +50,000 $75.8K EDGAR
2019-06-13 MUX Mixed −4,000 -$7.7K EDGAR
2019-05-15 MUX Sell (S) −26,000 -$50.1K EDGAR
2018-11-21 MUX Mixed — -$19.5K EDGAR
2017-09-26 MUX Buy (P) +10,000 $0 EDGAR
Showing 1–10 of 19
Page 1 of 2
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.