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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 $15.6M 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

$15.64M

Companies

4

Total Filings

50

Lifetime Open-Market Net

-$15.25M

Filer Profile

Reported Address
150 N. RADNOR CHESTER RD.
SUITE F200
RADNOR, PA 19087
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
MLYS Chief Executive Officer 603,621 $25.91 $15.64M -$15.36M 23 2026-07-15
IMUX Director — $9.23 — $0 2 2026-07-07
AVLN Director — $27.98 — $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
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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.