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WILLIAM TAI

CIK 1085619 · last filed 2026-06-15

WILLIAM TAI is a corporate insider who has filed 14 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for HUT, was dated Jun 15, 2026. Across all open-market trades the lifetime net is −$16.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $16.7M across reported positions. 7 SEC filings were submitted jointly with BRUCE I SACHS.

"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

$16.73M

Companies

5

Total Filings

14

Lifetime Open-Market Net

-$16.58M

Filer Profile

Reported Address
C/O IVP
3000 SAND HILL ROAD, 2-290
MENLO PARK, CA 94025
Related Filers
BRUCE I SACHS — 7 joint filings, latest 2009-12-02
TIMOTHY M HALEY — 2 joint filings, latest 2003-09-11
REBECCA B ROBERTSON — 2 joint filings, latest 2003-09-11
GEOFFREY Y YANG — 1 joint filings, latest 2003-08-21
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
HUT Director 189,901 $88.09 $16.73M $0 7 2026-06-15
MICROTUNE INC (TUNE) Delisted Director 97,229 $19.92 $1.94M $0 4 2010-06-03
BigBand Networks, Inc. (BBND) Delisted 10%+ Owner 8,963,169 — — -$523.2K 1 2009-11-20
VIRTUSA CORP (VRTU) Delisted 10%+ Owner 2,184,611 — — -$16.06M 1 2009-05-20
TRANSMETA CORP (TMTA) Delisted Director — — — $0 1 2007-08-03

Recent Filings

14 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
2026-06-15 HUT Mixed +15,713 $0 EDGAR
2025-08-08 HUT Grant (A) — $0 EDGAR
2025-06-23 HUT Exer (M) +18,698 $0 EDGAR
2024-08-13 HUT Grant (A) — $0 EDGAR
2024-06-25 HUT Exer (M) +17,633 $0 EDGAR
2024-03-28 HUT Grant (A) — $0 EDGAR
2024-01-03 HUT Grant (A) — $0 EDGAR
2010-06-03 MICROTUNE INC (TUNE) Delisted Exer (M) +2,800 $0 EDGAR
2009-11-20 BigBand Networks, Inc. (BBND) Delisted Sell (S) −140,000 -$523.2K EDGAR
2009-05-20 VIRTUSA CORP (VRTU) Delisted Sell (S) −2,358,000 -$16.06M EDGAR
Showing 1–10 of 14
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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.