Mark C. Biderman

Board Director

Director

Apollo Commercial Real Estate Finance, Inc.Atlas Energy Group, LLC

Insider activity · 24 months0 buys1 saleCumulative net flow

Nov 24 · 0 buys · 0 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 0 salesMar 25 · 0 buys · 0 salesApr 25 · 0 buys · 1 saleMay 25 · 0 buys · 0 salesJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 0 buys · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 0 buys · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 0 buys · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Companies

▲ Purchases (0 ops.)

—

▼ Sales (4 ops.)

€442k

Latest filing published 03 Apr 2026 for Apollo Commercial Real Estate Finance, Inc.. Read the official filing

Filing timeline

BuySale

Mark C. Biderman

Insider track record

Disclosed buys

Disclosed sells

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

Mark C. Biderman: trading record in brief

Mark C. Biderman is a declared insider at 2 companies (board member); the most frequent names are Apollo Commercial Real Estate Finance, Inc. and Atlas Energy Group, LLC. We count 10 filings; the first trade dates from 2 January 2016 and the latest from 1 April 2026.

Every open-market trade on record is a sale: 4 sales worth €442k. Besides market trades, the filings include 5 share grants and 1 option exercise.

The record was last updated on 3 April 2026 with a share grant in Apollo Commercial Real Estate Finance, Inc. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. For comparison, the SEC allows two business days to file a Form 4. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.