MARK C BIDERMAN
CIK 1263606 · EVP & VICE CHAIRMAN · last filed 2026-04-03
MARK C BIDERMAN is an EVP & VICE CHAIRMAN who has filed 73 SEC Form 4 insider transactions across 10 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 $755.8K 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.
$755.8K
10
73
-$976.1K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ARI | Director | 70,374 | $10.74 | $755.8K | -$513.5K | 16 | 2026-04-03 |
| Apollo Commercial Real Estate Finance, Inc. (ARIpC) Delisted | Director | 52,167 | — | — | -$841.3K | 10 | 2019-04-03 |
| Full Circle Capital Corp (FULL) Delisted | Director | 0 | — | — | $44.0K | 2 | 2016-11-04 |
| Apollo Commercial Real Estate Finance, Inc. (ARIpA) Delisted | Director | 51,875 | — | — | $0 | 7 | 2016-04-05 |
| Apollo Residential Mortgage, Inc. (AMTGpA) Delisted | Director | 32,784 | — | — | $0 | 5 | 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 |
| Apollo Residential Mortgage, Inc. (AMTG) Delisted | Director | 12,040 | — | — | $78.0K | 3 | 2012-04-04 |
| Atlas Energy, L.P. (AHD) Delisted | Director | — | — | — | $0 | 1 | 2011-03-02 |
| NATIONAL FINANCIAL PARTNERS CORP (NFP) Delisted | EVP & VICE CHAIRMAN | 32,888 | — | — | $0 | 5 | 2008-11-18 |
Recent Filings
73 filings| 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 |
| 2025-04-03 | ARI | Grant (A) | +10,162 | $0 | EDGAR |
| 2024-05-02 | ARI | Sell (S) | −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 |
| 2023-04-05 | ARI | Grant (A) | +10,822 | $0 | EDGAR |
| 2022-05-19 | ARI | Sell (S) | −10,000 | -$126.8K | EDGAR |
| 2022-04-05 | ARI | Grant (A) | +7,062 | $0 | EDGAR |
| 2021-04-28 | ARI | Sell (S) | −7,050 | -$105.5K | EDGAR |