RODERICK A. LARSON
CIK 1550150 · President and CEO · last filed 2026-05-21
"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.
Loading insider history…
Disclosed Exposure
$33.29M
Companies
2
Total Filings
41
Lifetime Open-Market Net
-$84.7K
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 |
|---|---|---|---|---|---|---|---|
| NPK International Inc. (NR) Delisted | Director | 257,306 | $7.25 | $1.87M | $0 | 13 | 2026-05-21 |
| OII | President and CEO | 648,710 | $51.32 | $33.29M | -$84.7K | 27 | 2026-05-19 |
Recent Filings · Page 3 of 5
41 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 |
|---|---|---|---|---|---|
| 2020-02-25 | OII | Tax (F) | −18,984 | -$246.2K | EDGAR |
| 2019-05-28 | NPK International Inc. (NR) Delisted | Grant (A) | +20,435 | $0 | EDGAR |
| 2019-03-01 | OII | Grant (A) | +83,246 | $0 | EDGAR |
| 2019-02-19 | OII | Tax (F) | −8,815 | -$146.8K | EDGAR |
| 2018-12-21 | OII | Buy (P) | +5,000 | $56.7K | EDGAR |
| 2018-05-21 | NPK International Inc. (NR) Delisted | Grant (A) | +13,953 | $0 | EDGAR |
| 2018-03-02 | OII | Grant (A) | +62,253 | $0 | EDGAR |
| 2018-02-21 | OII | Tax (F) | −4,805 | -$88.7K | EDGAR |
| 2017-05-19 | NPK International Inc. (NR) Delisted | Grant (A) | +19,230 | $0 | EDGAR |
| 2017-05-05 | OII | Grant (A) | +25,163 | $0 | 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.