# OCEAN PWR TECHNOLOGIES INC (OPTT)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/OPTT/

- Reporting holders: 84
- Reported value: $10.0M
- Shares held by institutions: 34,815,140 of 228,023,439 outstanding
- Held through calls: 7.6%
- Held through puts: 1.8%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $2.3M | 8,919,165 | 0.0% | 2 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $1.8M | 6,869,388 | 0.0% | 23 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $872.2K | 3,329,108 | 0.0% | 8 |
| [Polar Asset Management Partners Inc.](https://holderbook.com/funds/1326389-polar-asset-management-partners-inc/) | $797.3K | 3,043,227 | 0.0% | 1 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $576.2K | 2,198,484 | 0.0% | 23 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $514.9K | 1,965,368 | 0.0% | 21 |
| [Cambridge Investment Research Advisors, Inc.](https://holderbook.com/funds/1419186-cambridge-investment-research-advisors-inc/) | $366.0K | 1,394,006 | 0.0% | 5 |
| [VANGUARD FIDUCIARY TRUST CO](https://holderbook.com/funds/933478-vanguard-fiduciary-trust-co/) | $363.5K | 1,387,399 | 0.0% | 2 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $273.2K | 256,667 | 0.0% | 8 |
| [Spinnaker Investment Group, LLC](https://holderbook.com/funds/1911067-spinnaker-investment-group-llc/) | $272.8K | 1,041,240 | 0.0% | 2 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $191.4K | 0 | 0.0% | 8 |
| [IMC-Chicago, LLC](https://holderbook.com/funds/1452861-imc-chicago-llc/) | $178.5K | 103,241 | 0.0% | 2 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $136.0K | 519,151 | 0.0% | 23 |
| [ROYAL BANK OF CANADA](https://holderbook.com/funds/1000275-royal-bank-of-canada/) | $136.0K | 518,050 | 0.0% | 2 |
| [HAMILTON CAPITAL PARTNERS, LLC](https://holderbook.com/funds/2037578-hamilton-capital-partners-llc/) | $131.1K | 500,195 | 0.0% | 1 |
| [GROUP ONE TRADING LLC](https://holderbook.com/funds/932540-group-one-trading-llc/) | $130.3K | 99,787 | 0.0% | 7 |
| [Caption Management, LLC](https://holderbook.com/funds/1706766-caption-management-llc/) | $124.5K | 0 | 0.0% | 1 |
| [PEAK6 LLC](https://holderbook.com/funds/1389958-peak6-llc/) | $104.8K | 63,381 | 0.0% | 2 |
| [HighTower Advisors, LLC](https://holderbook.com/funds/1462245-hightower-advisors-llc/) | $91.7K | 350,100 | 0.0% | 1 |
| [SIMPLEX TRADING, LLC](https://holderbook.com/funds/1488542-simplex-trading-llc/) | $75.5K | 129,786 | 0.0% | 6 |
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $56.3K | 60,531 | 0.0% | 9 |
| [ESSEX INVESTMENT MANAGEMENT CO LLC](https://holderbook.com/funds/201772-essex-investment-management-co-llc/) | $53.7K | 204,864 | 0.0% | 4 |
| [D'Orazio & Associates, Inc.](https://holderbook.com/funds/1646821-d-orazio-associates-inc/) | $51.7K | 197,503 | 0.0% | 2 |
| [OneDigital Investment Advisors LLC](https://holderbook.com/funds/1690370-onedigital-investment-advisors-llc/) | $41.8K | 159,532 | 0.0% | 2 |
| [Pinnacle Financial Partners, Inc.](https://holderbook.com/funds/2082866-pinnacle-financial-partners-inc/) | $34.2K | 130,500 | 0.0% | 3 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 84 | $10.0M |
| Q1 2026 | 69 | $9.7M |
| Q4 2025 | 55 | $5.7M |
| Q3 2025 | 58 | $10.4M |
| Q2 2025 | 48 | $8.2M |
| Q1 2025 | 47 | $7.7M |
| Q4 2024 | 53 | $12.3M |
| Q3 2024 | 38 | $693.2K |
| Q2 2024 | 28 | $763.0K |
| Q1 2024 | 26 | $967.3K |
| Q4 2023 | 37 | $1.4M |
| Q3 2023 | 34 | $1.6M |