Home

Michael N Murdock

CIK 1316102 · EVP, Mergers and Acquisitions · last filed 2026-03-05

Michael N Murdock is an EVP, Mergers and Acquisitions who has filed 47 SEC Form 4 insider transactions across 2 companies since 2012. The most recent filing, for RDNT, was dated Mar 5, 2026. Across all open-market trades the lifetime net is −$5.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.4M 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

$3.44M

Companies

2

Total Filings

47

Lifetime Open-Market Net

-$5.86M

Filer Profile

Reported Address
3600 JP MORGAN CHASE TOWER
2200 ROSS AVENUE
DALLAS, TX 752012776
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
RDNT EVP, Mergers and Acquisitions 46,697 $73.71 $3.44M -$4.83M 30 2026-03-05
RadNet, Inc. (ROIAK) Delisted Executive Vice President 226,728 — — -$1.03M 13 2017-02-03

Recent Filings

47 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
2026-03-05 RDNT Grant (A) +6,613 $0 EDGAR
2025-11-17 RDNT Gift (G) −3,000 $0 EDGAR
2025-06-06 RDNT Sell (S) −11,132 -$646.2K EDGAR
2025-06-05 RDNT Notice (144) −11,132 -$651.1K EDGAR
2025-01-10 RDNT Grant (A) +11,072 $0 EDGAR
2024-12-03 RDNT Gift (G) −5,000 $0 EDGAR
2024-08-22 RDNT Sell (S) −15,000 -$941.7K EDGAR
2024-08-20 RDNT Notice (144) −15,000 -$937.5K EDGAR
2024-06-14 RDNT Sell (S) −10,000 -$625.1K EDGAR
2024-06-12 RDNT Notice (144) −10,000 -$611.3K EDGAR
Showing 1–10 of 47
Page 1 of 5
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.