Christoph Glingener

CIK 1943622 · Chief Technology Officer · last filed 2026-07-28

Christoph Glingener is a Chief Technology Officer who has filed 7 SEC Form 4 insider transactions across 1 company since 2023. The most recent filing, for ADTN, was dated Jul 28, 2026. Across all open-market trades the lifetime net is −$2.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $423.6K 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.

Disclosed Exposure

$423.6K

Companies

1

Total Filings

7

Lifetime Open-Market Net

-$2.22M

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
ADTN	Chief Technology Officer	56,029	$7.56	$423.6K	-$2.22M	6	2026-07-28

Recent Filings

7 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
2026-07-28	ADTN	Grant (A)	+9,384	$0	EDGAR
2026-05-11	ADTN	Mixed	—	-$626.6K	EDGAR
2026-05-07	ADTN	Notice (144)	−148,392	-$2.33M	EDGAR
2025-01-28	ADTN	Grant (A)	+27,777	$0	EDGAR
2024-05-29	ADTN	Tax (F)	−801	-$4.2K	EDGAR
2024-01-30	ADTN	Grant (A)	+12,044	$0	EDGAR
2023-05-25	ADTN	Grant (A)	+7,625	$0	EDGAR

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.