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John James Sullivan

CIK 1305784 · President and CEO · last filed 2026-08-17

John James Sullivan is a President and CEO who has filed 92 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing shows the insider sold $800.1K of MLAB on Aug 17, 2026. Across all open-market trades the lifetime net is −$24.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.6M across reported positions. 103 SEC filings were submitted jointly with MESA LABORATORIES INC /CO/.

"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

$7.61M

Companies

1

Total Filings

92

Lifetime Open-Market Net

-$24.26M

Filer Profile

Reported Address
12100 W. 6TH AVENUE
LAKEWOOD, CO 80228
Related Filers
MESA LABORATORIES INC /CO/ — 103 joint filings, latest 2026-08-17
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
MLAB Director 62,944 $120.87 $7.61M -$24.26M 92 2026-08-17

Recent Filings

92 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
2026-08-17 MLAB Sell (S) −7,093 -$800.1K EDGAR
2026-08-17 MLAB Exer (M) +2,784 $0 EDGAR
2025-12-05 MLAB Gift (G) −2,000 $0 EDGAR
2025-08-18 MLAB Mixed +1,404 $0 EDGAR
2024-11-25 MLAB Gift (G) −2,000 $0 EDGAR
2024-09-06 MLAB Exer (M) +1,074 $0 EDGAR
2024-08-19 MLAB Grant (A) — $0 EDGAR
2024-04-03 MLAB E — $0 EDGAR
2023-11-14 MLAB Gift (G) −2,000 $0 EDGAR
2023-09-06 MLAB Exer (M) — $0 EDGAR
Showing 1–10 of 92
Page 1 of 10
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.