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Michael H. Davidson

CIK 1573785 · Chief Executive Officer · last filed 2026-06-12

Michael H. Davidson is a Chief Executive Officer who has filed 29 SEC Form 4 insider transactions across 6 companies since 2020. The most recent filing, for BIOA, was dated Jun 12, 2026. Across all open-market trades the lifetime net is −$25.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.7M 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.

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Disclosed Exposure

$9.71M

Companies

6

Total Filings

29

Lifetime Open-Market Net

-$25.06M

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
BIOA Director — $21.92 — $0 3 2026-06-12
NAMSW Chief Executive Officer 459,859 $19.38 $8.91M -$25.16M 9 2026-03-02
TENX Director 2,881 $15.80 $45.5K $0 5 2026-01-13
SLN Director — $11.55 — $0 1 2025-01-06
THC Director 2,881 $262.63 $756.6K $0 1 2024-08-08
LISATA THERAPEUTICS, INC. (CLBS) Delisted Director 13,984 $6.40 $89.4K $99.9K 4 2022-01-12

Recent Filings

29 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
2026-06-12 BIOA Grant (A) — $0 EDGAR
2026-03-02 NAMS Notice (144) −443,707 -$15.73M EDGAR
2026-03-02 NAMSW Mixed — -$14.75M EDGAR
2026-02-26 NAMSW Mixed — -$10.58M EDGAR
2026-02-24 NAMS Notice (144) −750,000 -$27.13M EDGAR
2026-01-13 TENX Grant (A) — $0 EDGAR
2026-01-09 NAMSW Mixed +69,418 $0 EDGAR
2026-01-07 NAMS Notice (144) −11,582 -$410.9K EDGAR
2025-07-03 TENX Grant (A) — $0 EDGAR
2025-06-09 BIOA Grant (A) — $0 EDGAR
Showing 1–10 of 29
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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.