Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
361 institutional managers reported holding AAOI for the quarter ended Mar 31, 2026. Together they hold about 68% of shares outstanding; the top 10 hold 36%. 177 opened new positions; 31 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 7.19M | 9.47% | $608.5M | added +35.5% | 2013 Q4 |
| Vanguard Group | 5.40M | 7.11% | $457.2M | added +8.5% | 2013 Q4 |
| Oberweis Asset Management INC/ | 2.35M | 3.09% | $198.8M | added +15.2% | 2023 Q3 |
| Jane Street | 2.28M | 3.00% | $192.8M | added +35.4% | 2022 Q4 |
| D. E. Shaw | 2.12M | 2.79% | $179.1M | added +54.9% | 2023 Q4 |
| Invesco | 2.01M | 2.65% | $170.4M | trimmed -42.6% | 2023 Q4 |
| T. Rowe Price | 1.73M | 2.28% | $146.6M | trimmed -22.3% | 2024 Q2 |
| State Street | 1.64M | 2.16% | $139.1M | added +2.4% | 2014 Q2 |
| Geode Capital | 1.62M | 2.13% | $137.2M | added +7.2% | 2013 Q4 |
| Hood River Capital Management LLC | 1.28M | 1.68% | $107.9M | unchanged | 2025 Q3 |
| Value Aligned Research Advisors, LLC | 1.27M | 1.67% | $107.3M | opened | 2026 Q1 |
| Goldman Sachs | 1.08M | 1.43% | $91.8M | added +12.1% | 2016 Q1 |
| UBS | 1.08M | 1.42% | $91.0M | added +3% | 2013 Q4 |
| Raymond James Financial INC | 733.7k | 0.97% | $62.1M | added +93.5% | 2023 Q3 |
| Morgan Stanley | 727.6k | 0.96% | $61.6M | trimmed -57.2% | 2013 Q4 |
| T. Rowe Price Investment Management, INC. | 643.1k | 0.85% | $54.4M | opened | 2026 Q1 |
| Driehaus Capital Management LLC | 632.3k | 0.83% | $53.5M | added +24.6% | 2023 Q3 |
| Northern Trust | 583.5k | 0.77% | $49.4M | added +10.7% | 2013 Q4 |
| Renaissance Technologies | 565.3k | 0.74% | $47.8M | opened | 2026 Q1 |
| Charles Schwab Investment Management | 532.2k | 0.70% | $45.0M | added +0.7% | 2023 Q3 |
| Neuberger Berman Group LLC | 517.3k | 0.68% | $43.8M | opened | 2026 Q1 |
| Squarepoint Ops LLC | 495.8k | 0.65% | $41.9M | added +156.7% | 2025 Q2 |
| Balyasny Asset Management | 468.9k | 0.62% | $39.7M | added +181.8% | 2024 Q4 |
| Gilder Gagnon Howe & CO LLC | 455.4k | 0.60% | $38.5M | trimmed -4.1% | 2025 Q2 |
| Tudor Investment | 442.8k | 0.58% | $37.5M | added +365.4% | 2024 Q4 |
| Emerald Advisers, LLC | 433.9k | 0.57% | $36.7M | trimmed -35.3% | 2024 Q1 |
| Citadel Advisors | 421.0k | 0.55% | $35.6M | trimmed -23.6% | 2023 Q4 |
| Nuveen | 382.4k | 0.50% | $32.3M | added +69.7% | 2024 Q2 |
| Focus Partners Wealth | 379.1k | 0.50% | $32.1M | added +1950.6% | 2025 Q4 |
| Two Sigma | 341.2k | 0.45% | $28.9M | added +29.4% | 2023 Q4 |
| Artemis Investment Management LLP | 340.1k | 0.45% | $28.8M | trimmed -56% | 2025 Q4 |
| Next Century Growth Investors LLC | 320.7k | 0.42% | $27.1M | trimmed -31.1% | 2025 Q4 |
| Dimensional Fund Advisors | 309.9k | 0.41% | $26.2M | trimmed -25.9% | 2016 Q1 |
| Marex Group plc | 289.2k | 0.38% | $24.5M | opened | 2026 Q1 |
| Frontier Capital Management CO LLC | 284.1k | 0.37% | $24.0M | opened | 2026 Q1 |
| Kennedy Capital Management LLC | 279.1k | 0.37% | $23.6M | trimmed -37.6% | 2025 Q4 |
| Ameriprise Financial INC | 274.1k | 0.36% | $23.2M | added +396.4% | 2015 Q2 |
| Steward Partners Investment Advisory, LLC | 272.0k | 0.36% | $23.0M | trimmed -25.8% | 2025 Q1 |
| Emerald Mutual Fund Advisers Trust | 271.8k | 0.36% | $23.0M | trimmed -31.9% | 2024 Q1 |
| Point72 | 265.5k | 0.35% | $22.5M | opened | 2025 Q1 |
| Wellington Management | 257.7k | 0.34% | $21.8M | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 240.9k | 0.32% | $20.4M | trimmed -26.1% | 2013 Q4 |
| Voya Investment Management LLC | 240.7k | 0.32% | $20.4M | added +2185.3% | 2024 Q2 |
| Bridgewater Associates | 223.9k | 0.29% | $18.9M | opened | 2026 Q1 |
| Royce & Associates | 221.1k | 0.29% | $18.7M | trimmed -71.4% | 2021 Q2 |
| First Trust Advisors LP | 216.3k | 0.28% | $18.3M | trimmed -10.6% | 2025 Q2 |
| SG Americas Securities, LLC | 195.9k | 0.26% | $16.6M | added +129.8% | 2025 Q1 |
| Marshall Wace | 179.4k | 0.24% | $15.2M | added +195.1% | 2025 Q3 |
| CloudAlpha Capital Management Limited/Hong Kong (focused) | 177.4k | 0.23% | $15.0M | opened | 2024 Q4 |
| Penn Capital Management Company, LLC | 176.5k | 0.23% | $14.9M | trimmed -60.4% | 2025 Q3 |
Largest 50 of 361 shown; the full ranked, searchable register is at boothcheck.com/holders/AAOI. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.