OII · Insider trading · 13F holders · Congress trades
Oceaneering International Inc (OII)
Who is buying and selling OII: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 17
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $749K
- Congress trades, 12 months
- 1
OII at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 2 OII insiders filed 2 sales worth $749K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
- 17 13F filers hold OII among their 50 largest positions, worth $436.4M combined. The biggest bets by portfolio weight are Greenhouse Funds LLLP (4.0%), Keating Investment Counselors Inc (3.8%) and Archon Capital Management LLC (3.4%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
- Members of Congress have disclosed 1 OII trade since 2015, 0 purchases and 1 sale in the past year; the latest was Thomas MacArthur (R-NJ), selling $1K–15K on Jan 27, 2015.
- OII last closed at $41.57 on Oct 29, 2026.
OII insider trading
Between Aug 1, 2026 and Oct 29, 2026, 2 OII insiders filed 2 sales worth $749K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 5, 2026 | Larson Roderick A. | President and CEO, Director | Sale10b5-1 | 6,000 | $44.16 | $265K | SEC |
| Aug 10, 2026 | Murphy Paul B Jr | Director | Sale | 10,000 | $48.37 | $484K | SEC |
Who owns OII? Hedge funds and superinvestors
17 13F filers hold OII among their 50 largest positions, worth $436.4M combined. The biggest bets by portfolio weight are Greenhouse Funds LLLP (4.0%), Keating Investment Counselors Inc (3.8%) and Archon Capital Management LLC (3.4%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Morgan Stanley Institutional Investment Advisors LLCInstitutional asset manager | 11.6% | $124.2M | 3,066,015 | -11.2% shares | Q2 2026 |
| Greenhouse Funds LLLPHedge fund | 4.0% | $76.8M | 1,896,343 | -6.7% shares | Q2 2026 |
| Reinhart Partners, LLC.Institutional asset manager | 1.8% | $72.0M | 1,650,476 | +0.1% shares | Q3 2026 |
| Ranger Investment Management, L.P.Institutional asset manager | 2.0% | $31.5M | 777,643 | -2.4% shares | Q2 2026 |
| Goehring & Rozencwajg Associates, LLCMutual fund manager | 1.8% | $31.4M | 775,476 | +8.7% shares | Q2 2026 |
| Old West Investment Management, LLCHedge fund | 3.0% | $28.1M | 693,549 | -0.5% shares | Q2 2026 |
| Keating Investment Counselors IncWealth manager | 3.8% | $14.4M | 331,093 | -0.8% shares | Q3 2026 |
| Granite Investment Partners, LLCWealth manager | 0.7% | $13.3M | 328,414 | +0.4% shares | Q2 2026 |
| Sagefield Capital LPHedge fund | 0.9% | $11.5M | 284,724 | +16.6% shares | Q2 2026 |
| Archon Capital Management LLCHedge fund | 3.4% | $8.4M | 208,000 | +0.0% shares | Q2 2026 |
| Manatuck Hill Partners, LLCHedge fund | 2.2% | $6.5M | 160,600 | +0.0% shares | Q2 2026 |
| Essex Investment Management Co LLCAsset manager | 0.9% | $6.4M | 146,483 | -3.3% shares | Q3 2026 |
| Glenorchy Capital LtdWealth manager | 1.9% | $3.0M | 74,354 | +0.1% shares | Q2 2026 |
| Corigliano Investment Advisers, LLCWealth manager | 1.1% | $2.9M | 82,600 | New | Q1 2026 |
| GeoSphere Capital Management, LLCHedge fund | 1.5% | $2.8M | 69,689 | -41.9% shares | Q2 2026 |
| CoreCommodity Management, LLCMutual fund manager | 0.4% | $1.9M | 47,617 | +3.3% shares | Q2 2026 |
| Tower View Wealth Management LLCWealth manager | 0.4% | $1.0M | 23,281 | — | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 4, Q2 2026: 12, Q1 2026: 1). Screen OII in the grand portfolio →
OII stock trades by members of Congress
Members of Congress have disclosed 1 OII trade since 2015, 0 purchases and 1 sale in the past year; the latest was Thomas MacArthur (R-NJ), selling $1K–15K on Jan 27, 2015.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Mar 5, 2015 | Thomas MacArthurR-NJ · House | Sale | $1K–15K | Jan 27, 2015 | -24.1% |
OII questions and answers
Are insiders buying OII stock?
Between Aug 1, 2026 and Oct 29, 2026, 2 OII insiders filed 2 sales worth $749K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own OII?
17 13F filers hold OII among their 50 largest positions, worth $436.4M combined. The biggest bets by portfolio weight are Greenhouse Funds LLLP (4.0%), Keating Investment Counselors Inc (3.8%) and Archon Capital Management LLC (3.4%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
Has Congress traded OII?
Members of Congress have disclosed 1 OII trade since 2015, 0 purchases and 1 sale in the past year; the latest was Thomas MacArthur (R-NJ), selling $1K–15K on Jan 27, 2015.
Who is the largest holder of OII?
Among 13F filers, Morgan Stanley Institutional Investment Advisors LLC reports the largest OII position, $124.2M (3,066,015 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Greenhouse Funds LLLP's: 4.0% of its portfolio.
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