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Mark W Midkiff

CIK 1728747 · Chief Risk Officer · last filed 2026-04-29

Mark W Midkiff is a Chief Risk Officer who has filed 20 SEC Form 4 insider transactions across 2 companies since 2018. The most recent filing, for TCBIO, was dated Apr 29, 2026. Across all open-market trades the lifetime net is −$510.3K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.9M 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

$1.86M

Companies

2

Total Filings

20

Lifetime Open-Market Net

-$510.3K

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
TCBIO Director 2,804 $20.46 $57.4K $0 4 2026-04-29
KEY Chief Risk Officer 79,560 $22.63 $1.80M -$510.3K 16 2023-02-28

Recent Filings

20 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
2026-04-29 TCBIO Grant (A) — $0 EDGAR
2026-04-23 TCBIO Exer (M) +1,670 $0 EDGAR
2025-04-24 TCBIO Mixed +1,134 $0 EDGAR
2024-06-04 TCBIO Grant (A) — $0 EDGAR
2023-02-28 KEY Mixed +3,610 -$54.9K EDGAR
2023-02-22 KEY Mixed +11,752 -$101.8K EDGAR
2022-02-28 KEY Mixed +3,462 -$69.3K EDGAR
2022-02-22 KEY Mixed +6,571 -$140.3K EDGAR
2022-02-16 KEY Grant (A) — $0 EDGAR
2021-05-03 KEY Mixed +249 -$99.4K EDGAR
Showing 1–10 of 20
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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.