Sam Bucci

CIK 1824854 · EVP, Chief Operating Officer · last filed 2026-06-17

Sam Bucci is an EVP, Chief Operating Officer who has filed 27 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing, for RBBN, was dated Jun 17, 2026. Across all open-market trades the lifetime net is −$291.0K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.1M 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

$1.10M

Companies

1

Total Filings

27

Lifetime Open-Market Net

-$291.0K

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
RBBN	EVP, Chief Operating Officer	536,035	$2.05	$1.10M	-$291.0K	27	2026-06-17

Recent Filings

27 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
2026-06-17	RBBN	Grant (A)	—	$0	EDGAR
2026-05-19	RBBN	Mixed	+150,460	-$462.2K	EDGAR
2025-10-17	RBBN	Mixed	+11,997	-$52.7K	EDGAR
2025-05-19	RBBN	Mixed	+24,510	-$102.2K	EDGAR
2025-04-22	RBBN	Mixed	+24,409	-$100.0K	EDGAR
2025-03-18	RBBN	Mixed	+11,034	-$33.2K	EDGAR
2025-03-18	RBBN	Mixed	+45,126	-$205.3K	EDGAR
2024-10-21	RBBN	Mixed	+24,409	-$97.6K	EDGAR
2024-05-17	RBBN	Grant (A)	—	$0	EDGAR
2024-04-19	RBBN	Mixed	+49,418	-$142.1K	EDGAR

Showing 1–10 of 27

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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.