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Michael Holder

CIK 1515140 · Chief Financial Officer · last filed 2026-06-12

Michael Holder is a Chief Financial Officer who has filed 16 SEC Form 4 insider transactions across 3 companies since 2021. The most recent filing, for CTKB, was dated Jun 12, 2026. Current disclosed insider exposure totals $484.8K 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.

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Disclosed Exposure

$484.8K

Companies

3

Total Filings

16

Lifetime Open-Market Net

$0

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
CTKB Director 60,694 $4.46 $270.7K $0 11 2026-06-12
MDXH Director — $0.41 — $0 1 2026-06-03
RCEL Chief Financial Officer 46,450 $4.61 $214.1K $0 4 2022-07-06

Recent Filings

16 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 CTKB Mixed +43,973 $0 EDGAR
2026-06-03 MDXH Grant (A) — $0 EDGAR
2026-05-20 CTKB Exer (M) +1,454 $0 EDGAR
2026-03-12 CTKB Exer (M) +2,908 $0 EDGAR
2025-11-20 CTKB Exer (M) +2,181 $0 EDGAR
2025-08-20 CTKB Exer (M) +2,181 $0 EDGAR
2025-06-20 CTKB Grant (A) — $0 EDGAR
2025-05-21 CTKB Exer (M) +1,454 $0 EDGAR
2025-03-12 CTKB Exer (M) +2,908 $0 EDGAR
2024-11-20 CTKB Exer (M) +2,181 $0 EDGAR
Showing 1–10 of 16
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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.