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Jon Congleton

CIK 1644975 · Chief Executive Officer · last filed 2026-07-15

Jon Congleton is a Chief Executive Officer who has filed 50 SEC Form 4 insider transactions across 4 companies since 2015. The most recent filing shows the insider sold $291.4K of MLYS on Jul 15, 2026. Across all open-market trades the lifetime net is −$15.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $16.5M 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

$16.53M

Companies

4

Total Filings

50

Lifetime Open-Market Net

-$15.25M

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
MLYS Chief Executive Officer 603,621 $27.38 $16.53M -$15.36M 23 2026-07-15
IMUX Director — $14.10 — $0 2 2026-07-07
AVLN Director — $34.56 — $0 1 2026-05-01
ALPINE IMMUNE SCIENCES, INC. (NVLS) Delisted President and CEO 5,000 — — $102.8K 6 2016-09-14

Recent Filings

50 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
2026-07-15 MLYS Sell (S) −10,700 -$291.4K EDGAR
2026-07-13 MLYS Notice (144) −10,700 -$291.4K EDGAR
2026-07-07 IMUX Grant (A) — $0 EDGAR
2026-06-30 MLYS Notice (144) −75,000 -$1.96M EDGAR
2026-06-29 IMUX Grant (A) — $0 EDGAR
2026-05-01 AVLN Grant (A) — $0 EDGAR
2026-04-15 MLYS Sell (S) −15,730 -$422.0K EDGAR
2026-04-13 MLYS Notice (144) −15,730 -$422.0K EDGAR
2026-04-02 MLYS Sell (S) −75,000 -$1.97M EDGAR
2026-03-31 MLYS Notice (144) −75,000 -$1.97M EDGAR
Showing 1–10 of 50
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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.