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MICHAEL K KOBAYASHI

CIK 1311099 · PRES., CHIEF CAPABILITY OFC'R · last filed 2026-06-02

MICHAEL K KOBAYASHI is a PRES., CHIEF CAPABILITY OFC'R who has filed 27 SEC Form 4 insider transactions across 2 companies since 2019. The most recent filing, for GO, was dated Jun 2, 2026. Across all open-market trades the lifetime net is −$8.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $17.6M 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

$17.62M

Companies

2

Total Filings

27

Lifetime Open-Market Net

-$8.79M

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
GO Director 30,707 $12.04 $369.7K $0 2 2026-06-02
ROST PRES., CHIEF CAPABILITY OFC'R 71,441 $241.52 $17.25M -$8.79M 22 2025-03-25

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
2026-06-02 GO Grant (A) +18,868 $0 EDGAR
2025-06-27 GO Grant (A) +11,839 $150.0K EDGAR
2025-03-25 ROST Mixed +126 -$1.19M EDGAR
2024-04-01 ROST Sell (S) −13,860 -$2.04M EDGAR
2024-03-26 ROST Notice (144) −13,860 -$2.01M EDGAR
2024-03-26 ROST Mixed +4,104 -$2.07M EDGAR
2023-10-10 ROST Sell (S) −20,749 -$2.32M EDGAR
2023-09-20 ROST Notice (144) −4,398 -$510.5K EDGAR
2023-09-19 ROST Tax (F) −4,324 -$511.0K EDGAR
2023-08-22 ROST Notice (144) −16,351 -$1.95M 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.