Shigeyuki Hamamatsu

CIK 1379827 · Chief Financial Officer · last filed 2026-06-16

Shigeyuki Hamamatsu is a Chief Financial Officer who has filed 82 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider had shares withheld for taxes covering $51.0K of OOMA on Jun 16, 2026. Across all open-market trades the lifetime net is −$2.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.0M 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

$3.98M

Companies

3

Total Filings

82

Lifetime Open-Market Net

-$2.11M

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
OOMA	Chief Financial Officer	184,227	$21.03	$3.87M	-$1.43M	55	2026-06-16
ARAY	SVP & CFO	228,009	$0.29	$66.1K	-$145.2K	10	2020-12-02
NETL		1,326	$26.21	$34.7K	-$542.6K	12	2008-01-02

Recent Filings

82 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
2026-06-16	OOMA	Tax (F)	−2,971	-$51.0K	EDGAR
2026-06-11	OOMA	Tax (F)	−2,961	-$51.9K	EDGAR
2026-06-10	OOMA	Tax (F)	−3,124	-$52.3K	EDGAR
2026-06-03	OOMA	Mixed	−30,638	-$541.9K	EDGAR
2026-06-02	OOMA	Notice (144)	−27,696	-$488.4K	EDGAR
2026-03-17	OOMA	Tax (F)	−2,382	-$32.6K	EDGAR
2026-03-12	OOMA	Tax (F)	−2,345	-$33.4K	EDGAR
2026-03-09	OOMA	Mixed	−13,270	-$189.1K	EDGAR
2026-03-06	OOMA	Notice (144)	−10,790	-$153.4K	EDGAR
2026-03-03	OOMA	Mixed	+68,800	-$14.8K	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.