Who owns Applied Optoelectronics (AAOI)?
110 holders named in SEC filings declare between 50.8% and 61.9% of Applied Optoelectronics' shares outstanding, as of Sep 15, 2026. The largest are Vanguard (7.8%), BlackRock (7.6%) and Invesco (4.0%); the five largest hold 25.4% together. Another 378 institutions hold small positions worth 3.3%. At least 34.8% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 17.5% and sold 20.4% of the shares, a net sale of 2.8%; 163 opened a position, 128 added, 142 reduced and 62 sold out. Biggest buyers: Marex Group plc (+2.5M shares) and Invesco (+1.4M shares). Biggest sellers: T. Rowe Price (-2.2M) and D. E. Shaw (-2.1M). Schedule 13D/G filings since Mar 31, 2026: BlackRock, Inc. crossed 5% (5.1%) on Jun 30, 2026, JANE STREET GROUP, LLC fell below 5% (2.3% still declared) on Jun 30, 2026 and Marex Securities Products Inc. crossed 5% (5.3%) on May 8, 2026. Directors and officers, from their latest Form 4: Chih-Hsiang (Thompson) Lin (2.5%), Shu-Hua (Joshua) Yeh (0.45%) and Stefan J. Murry (0.43%). Over time, 472 managers declared Applied Optoelectronics in their 13F for Q2 2026, against 108 for Q4 2019: together at most 63.6% of the shares outstanding, against 52.5%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| Vanguard | 13F | 7.8% | Jun 30, 2026 | Q4 2019 or earlier |
| BlackRock | 13F | 7.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 4.0% | Jun 30, 2026 | Q4 2023 |
| Marex Group plc | 13F | 3.3% | Jun 30, 2026 | Q1 2026 |
| UBS | 13F | 2.7% | Jun 30, 2026 | Q4 2019 or earlier |
| Chih-Hsiang (Thompson) Lin | Form 4 | 2.5% | Jul 31, 2026 | — |
| OBERWEIS ASSET MANAGEMENT INC/ | 13F | 2.1% | Jun 30, 2026 | Q3 2023 |
| Geode Capital | 13F | 2.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Value Aligned Research Advisors, LLC | 13F | 1.9% | Jun 30, 2026 | Q1 2026 |
| Goldman Sachs | 13F | 1.9% | Jun 30, 2026 | Q3 2023 |
| State Street | 13F | 1.8% | Jun 30, 2026 | Q4 2019 or earlier |
| Hood River Capital Management LLC | 13F | 1.6% | Jun 30, 2026 | Q3 2025 |
| Clear Street Group Inc. | 13F | 1.5% | Jun 30, 2026 | Q2 2026 |
| Morgan Stanley | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
| JPMorgan | 13F | 1.3% | Jun 30, 2026 | Q2 2024 |
| FRONTIER CAPITAL MANAGEMENT CO.,LLC | 13F | 1.2% | Jun 30, 2026 | Q1 2026 |
| Susquehanna | 13F | 0.77% | Jun 30, 2026 | Q3 2024 |
| Jane Street | 13F | 0.67% | Jun 30, 2026 | Q2 2023 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 13F | 0.60% | Jun 30, 2026 | Q2 2026 |
| Charles Schwab | 13F | 0.56% | Jun 30, 2026 | Q3 2023 |
| Northern Trust | 13F | 0.49% | Jun 30, 2026 | Q4 2019 or earlier |
| Capula Management Ltd | 13F | 0.45% | Jun 30, 2026 | Q2 2026 |
| Shu-Hua (Joshua) Yeh | Form 4 | 0.45% | Aug 18, 2026 | — |
| Stefan J. Murry | Form 4 | 0.43% | Sep 10, 2026 | — |
| GILDER GAGNON HOWE & CO LLC | 13F | 0.41% | Jun 30, 2026 | Q2 2025 |
Applied Optoelectronics institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 108 | 52.5% | $143.4M | 38.5% |
| Q4 2020 | 94 | 48.8% | $95.5M | 31.5% |
| Q4 2021 | 75 | 39.7% | $55.7M | 62.7% |
| Q4 2022 | 56 | 32.5% | $17.5M | 53.6% |
| Q4 2023 | 101 | 66.3% | $455.1M | 71.7% |
| Q4 2024 | 154 | 68.1% | $1.1B | 61.6% |
| Q4 2025 | 217 | 69.9% | $1.7B | 46.7% |
| Q2 2026 | 472 | 63.6% | $7.6B | 38.5% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.