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Glenn Grindstaff

CIK 1804609 · CHIEF HUMAN RESOURCES OFFICER · last filed 2026-08-04

Glenn Grindstaff is a CHIEF HUMAN RESOURCES OFFICER who has filed 28 SEC Form 4 insider transactions across 1 company since 2020. The most recent filing shows the insider was granted $135.0K of OSIS on Aug 4, 2026. Across all open-market trades the lifetime net is −$426.8K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.3M 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

$2.31M

Companies

1

Total Filings

28

Lifetime Open-Market Net

-$426.8K

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
OSIS CHIEF HUMAN RESOURCES OFFICER 9,932 $232.61 $2.31M -$426.8K 26 2026-08-04

Recent Filings

28 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
2026-08-04 OSIS Grant (A) +610 $135.0K EDGAR
2026-07-01 OSIS Grant (A) +17 $3.2K EDGAR
2025-08-28 OSIS Mixed +382 $86.0K EDGAR
2025-08-05 OSIS Grant (A) +569 $124.9K EDGAR
2025-05-09 OSIS Sell (S) −688 -$154.7K EDGAR
2025-05-08 OSIS Notice (144) −688 -$154.7K EDGAR
2024-08-30 OSIS Mixed +1,177 $175.2K EDGAR
2024-08-16 OSIS Grant (A) +1,439 $200.0K EDGAR
2024-06-25 OSIS Tax (F) −61 -$8.3K EDGAR
2023-09-14 OSIS Sell (S) −1,373 -$165.6K EDGAR
Showing 1–10 of 28
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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.