Home

MARK C BIDERMAN

CIK 1263606 · EVP & VICE CHAIRMAN · last filed 2026-04-03

MARK C BIDERMAN is an EVP & VICE CHAIRMAN who has filed 76 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing, for ARI, was dated Apr 3, 2026. Across all open-market trades the lifetime net is −$976.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $458.5K 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.

Loading insider history…
Disclosed Exposure

$458.5K

Companies

7

Total Filings

76

Lifetime Open-Market Net

-$976.1K

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
ARI Director 70,374 $6.51 $458.5K -$1.35M 33 2026-04-03
Full Circle Capital Corp (FULL) Delisted Director 0 — — $44.0K 2 2016-11-04
Apollo Residential Mortgage, Inc. (AMTG) Delisted Director 32,784 — — $78.0K 8 2016-04-05
Full Circle Capital Corp (FULL.L) Delisted Director 22,700 — — $67.0K 2 2015-04-08
Atlas Energy, L.P. (ATLS) Delisted Director 0 — — $189.7K 10 2015-03-03
AHD Director — $25.45 — $0 1 2011-03-02
NATIONAL FINANCIAL PARTNERS CORP (NFP) Delisted EVP & VICE CHAIRMAN 32,888 — — $0 5 2008-11-18

Recent Filings

76 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
2026-04-03 ARI Grant (A) +9,587 $0 EDGAR
2025-05-01 ARI Sell (S) −10,000 -$94.8K EDGAR
2025-04-29 ARI Notice (144) −10,000 -$94.8K EDGAR
2025-04-03 ARI Grant (A) +10,162 $0 EDGAR
2024-05-02 ARI Sell (S) −15,000 -$149.9K EDGAR
2024-05-01 ARI Notice (144) −15,000 -$149.9K EDGAR
2024-04-03 ARI Grant (A) +9,140 $0 EDGAR
2023-09-08 ARI Sell (S) −10,000 -$106.0K EDGAR
2023-09-06 ARI Notice (144) −10,000 -$106.0K EDGAR
2023-04-05 ARI Grant (A) +10,822 $0 EDGAR
Showing 1–10 of 76
Page 1 of 8
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.