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Matthew H. Birenbaum

CIK 1532949 · Executive Vice President & CDO · last filed 2026-08-19

Matthew H. Birenbaum is an Executive Vice President & CDO who has filed 45 SEC Form 4 insider transactions across 2 companies since 2011. The most recent filing, for VMRK, was dated Aug 19, 2026. Across all open-market trades the lifetime net is −$4.6M, making them a net seller over the disclosed history.

"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

$0

Companies

2

Total Filings

45

Lifetime Open-Market Net

-$4.62M

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
VMRK Executive Vice President & CDO 274,149 — — $0 1 2026-08-19
AVB Chief Investment Officer 0 $184.06 $0 -$4.62M 42 2026-08-17

Recent Filings

45 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
2026-08-19 VMRK Grant (A) +35,946 $0 EDGAR
2026-08-17 AVB Mixed −85,285 $0 EDGAR
2026-06-22 AVB Tax (F) −7,595 -$1.35M EDGAR
2026-03-03 AVB Tax (F) −5,706 -$1.01M EDGAR
2026-03-02 AVB Grant (A) +20,067 $0 EDGAR
2025-06-18 AVB Gift (G) −500 $0 EDGAR
2025-03-04 AVB Mixed −6,449 -$1.36M EDGAR
2025-02-28 AVB Grant (A) +13,774 $0 EDGAR
2024-08-07 AVB Sell (S) −5,000 -$1.04M EDGAR
2024-08-05 AVB Notice (144) −5,000 -$1.04M EDGAR
Showing 1–10 of 45
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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.