NICHOLAS M GRINDSTAFF
CIK 1134710 · Chief Financial Officer (CFO) · last filed 2026-07-14
"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
$25.37M
Companies
3
Total Filings
44
Lifetime Open-Market Net
-$2.93M
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 |
|---|---|---|---|---|---|---|---|
| STRL | Chief Financial Officer (CFO) | 6,037 | $611.47 | $3.69M | $0 | 3 | 2026-07-14 |
| Orbital Infrastructure Group, Inc. (OIG) Delisted | Chief Financial Officer | 7,401 | $0.38 | $2.8K | $0 | 1 | 2022-10-17 |
| PWR | VP - Finance and Treasurer | 31,868 | $680.20 | $21.68M | -$2.93M | 40 | 2021-05-12 |
Recent Filings · Page 2 of 5
44 filingsInsider 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 |
|---|---|---|---|---|---|
| 2020-03-30 | PWR | Grant (A) | +3,744 | $0 | EDGAR |
| 2020-03-06 | PWR | Mixed | +3,693 | -$67.6K | EDGAR |
| 2020-03-03 | PWR | Tax (F) | −470 | -$18.5K | EDGAR |
| 2020-01-03 | PWR | Tax (F) | −1,773 | -$72.2K | EDGAR |
| 2019-03-11 | PWR | Grant (A) | +2,862 | $0 | EDGAR |
| 2019-03-04 | PWR | Mixed | +6,606 | -$12.9K | EDGAR |
| 2018-03-02 | PWR | Mixed | +6,111 | -$9.1K | EDGAR |
| 2017-03-24 | PWR | Grant (A) | +2,723 | $0 | EDGAR |
| 2017-03-02 | PWR | Tax (F) | −109 | -$4.2K | EDGAR |
| 2017-03-01 | PWR | Sell (S) | −27,000 | -$1.03M | EDGAR |
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.
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.