Who owns Applied Optoelectronics (AAOI)
Which tracked institutional funds hold AAOI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AAOI company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on AAOI is one-sided between 2025-Q4 and 2026-Q1: 210 added or opened and 28 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AAOI’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes AAOI more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in AAOI divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 374 tracked filers holding AAOI, 286 increased or opened the position and 111 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AAOI between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 94
- VANGUARD CAPITAL MANAGEMENT LLC$259M
- VANGUARD PORTFOLIO MANAGEMENT LLC$152M
- Value Aligned Research Advisors, LLC$107M
- T. Rowe Price Investment Management, Inc.$54M
- RENAISSANCE TECHNOLOGIES LLC$48M
- NEUBERGER BERMAN GROUP LLC$44M
Full exits 11
- VANGUARD GROUP INC$174M
- HAWK RIDGE CAPITAL MANAGEMENT LP$59M
- Roubaix Capital, LLC$4M
- Walleye Trading LLC$4M
- F/m Investments LLC$3M
- Atika Capital Management LLC$3M
Largest adds
- BlackRock, Inc.$323M
- JANE STREET GROUP, LLC$134M
- D. E. Shaw & Co., Inc.$131M
- OBERWEIS ASSET MANAGEMENT INC/$128M
- JPMORGAN CHASE & CO$93M
- GEODE CAPITAL MANAGEMENT, LLC$84M
Largest trims
- BNP PARIBAS FINANCIAL MARKETS$32M
- ROYCE & ASSOCIATES LP$8M
- Portolan Capital Management, LLC$5M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$4M
- FMR LLC$3M
- SIMPLEX TRADING, LLC$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 6,450,270 | $956M | 19.4% | 2026-Q2 |
| Invesco Ltd. added | 3,414,262 | $506M | 10.3% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,061,522 | $259M | 5.3% | 2026-Q1 |
| STATE STREET CORP trimmed | 1,497,617 | $222M | 4.5% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 2,349,969 | $199M | 4.0% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 2,279,318 | $193M | 3.9% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 1,801,883 | $152M | 3.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,621,305 | $137M | 2.8% | 2026-Q1 |
| Hood River Capital Management LLC trimmed | 1,275,519 | $108M | 2.2% | 2026-Q1 |
| Value Aligned Research Advisors, LLC new | 1,267,938 | $107M | 2.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 1,111,132 | $95M | 1.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,084,764 | $92M | 1.9% | 2026-Q1 |
| UBS Group AG added | 970,744 | $82M | 1.7% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 733,696 | $62M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 727,566 | $62M | 1.3% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. new | 643,145 | $54M | 1.1% | 2026-Q1 |
| Driehaus Capital Management LLC added | 632,337 | $53M | 1.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 583,494 | $49M | 1.0% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 565,279 | $48M | 1.0% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 532,228 | $45M | 0.9% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 517,341 | $44M | 0.9% | 2026-Q1 |
| Squarepoint Ops LLC added | 495,798 | $42M | 0.9% | 2026-Q1 |
| GILDER GAGNON HOWE & CO LLC trimmed | 455,375 | $39M | 0.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 447,682 | $38M | 0.8% | 2026-Q1 |
| EMERALD ADVISERS, LLC trimmed | 433,882 | $37M | 0.7% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 244,081 | $36M | 0.7% | 2026-Q2 |
| Nuveen, LLC added | 382,371 | $32M | 0.7% | 2026-Q1 |
| Focus Partners Wealth added | 379,062 | $32M | 0.7% | 2026-Q1 |
| Artemis Investment Management LLP trimmed | 340,148 | $29M | 0.6% | 2026-Q1 |
| NEXT CENTURY GROWTH INVESTORS LLC trimmed | 320,731 | $27M | 0.6% | 2026-Q1 |
| MARSHALL WACE, LLP added | 181,389 | $27M | 0.5% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 309,894 | $26M | 0.5% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 175,683 | $26M | 0.5% | 2026-Q2 |
| Marex Group plc added | 289,167 | $24M | 0.5% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC new | 284,146 | $24M | 0.5% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 279,144 | $24M | 0.5% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 274,123 | $23M | 0.5% | 2026-Q1 |
| Steward Partners Investment Advisory, LLC trimmed | 271,989 | $23M | 0.5% | 2026-Q1 |
| EMERALD MUTUAL FUND ADVISERS TRUST trimmed | 271,760 | $23M | 0.5% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 265,543 | $22M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 240,886 | $20M | 0.4% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 240,710 | $20M | 0.4% | 2026-Q1 |
| NORGES BANK new | 131,200 | $19M | 0.4% | 2026-Q2 |
| Bridgewater Associates, LP new | 223,935 | $19M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 126,326 | $19M | 0.4% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 221,084 | $19M | 0.4% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 216,265 | $18M | 0.4% | 2026-Q1 |
| SG Americas Securities, LLC added | 195,908 | $17M | 0.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 110,933 | $16M | 0.3% | 2026-Q2 |
| CloudAlpha Capital Management Limited/Hong Kong trimmed | 177,410 | $15M | 0.3% | 2026-Q1 |
| Penn Capital Management Company, LLC trimmed | 176,453 | $15M | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp added | 170,958 | $14M | 0.3% | 2026-Q1 |
| Anther Capital Ltd new | 170,488 | $14M | 0.3% | 2026-Q1 |
| SEI INVESTMENTS CO added | 158,871 | $13M | 0.3% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 158,403 | $13M | 0.3% | 2026-Q1 |
| CITIGROUP INC added | 150,326 | $13M | 0.3% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 145,748 | $12M | 0.3% | 2026-Q1 |
| GROUP ONE TRADING LLC trimmed | 135,972 | $12M | 0.2% | 2026-Q1 |
| Andar Capital Management HK Ltd new | 134,000 | $11M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 128,300 | $11M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 127,971 | $11M | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 72,798 | $11M | 0.2% | 2026-Q2 |
| 1492 Capital Management LLC trimmed | 125,136 | $11M | 0.2% | 2026-Q1 |
| IMC-Chicago, LLC trimmed | 110,916 | $9M | 0.2% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 106,635 | $9M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 60,695 | $9M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 105,476 | $9M | 0.2% | 2026-Q1 |
| Ariose Capital Management Ltd new | 104,000 | $9M | 0.2% | 2026-Q1 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 98,318 | $8M | 0.2% | 2026-Q1 |
| CenterBook Partners LP added | 96,322 | $8M | 0.2% | 2026-Q1 |
| AXIOM INVESTORS LLC /DE new | 95,015 | $8M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 94,743 | $8M | 0.2% | 2026-Q1 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 89,669 | $8M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 86,973 | $7M | 0.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 49,525 | $7M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 81,184 | $7M | 0.1% | 2026-Q1 |
| PICTON MAHONEY ASSET MANAGEMENT new | 80,080 | $7M | 0.1% | 2026-Q1 |
| Zweig-DiMenna Associates LLC added | 80,050 | $7M | 0.1% | 2026-Q1 |
| Jain Global LLC trimmed | 78,640 | $7M | 0.1% | 2026-Q1 |
| Man Group plc new | 74,699 | $6M | 0.1% | 2026-Q1 |
| THAMES CAPITAL MANAGEMENT LLC new | 74,334 | $6M | 0.1% | 2026-Q1 |
| SPHERA FUNDS MANAGEMENT LTD. new | 73,400 | $6M | 0.1% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 41,056 | $6M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 70,464 | $6M | 0.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 69,363 | $6M | 0.1% | 2026-Q1 |
| UNICOM Systems, Inc. new | 68,591 | $6M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 66,521 | $6M | 0.1% | 2026-Q1 |
| Shellback Capital, LP trimmed | 65,000 | $5M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 64,798 | $5M | 0.1% | 2026-Q1 |
| Caitong International Asset Management Co., Ltd added | 61,323 | $5M | 0.1% | 2026-Q1 |
| Global Trust Asset Management, LLC added | 59,562 | $5M | 0.1% | 2026-Q1 |
| SCALAR GAUGE MANAGEMENT, LLC trimmed | 59,301 | $5M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 4,982,660 | $174M | 3.5% | 2025-Q4 stale |
| HAWK RIDGE CAPITAL MANAGEMENT LP added | 1,700,900 | $59M | 1.2% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. added | 761,196 | $20M | 0.4% | 2025-Q3 stale |
| Point72 Hong Kong Ltd trimmed | 646,759 | $17M | 0.3% | 2025-Q3 stale |
| Point72 Asia (Singapore) Pte. Ltd. new | 338,976 | $9M | 0.2% | 2025-Q3 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 300,000 | $8M | 0.2% | 2025-Q3 stale |
| AI-Squared Management Ltd new | 194,500 | $5M | 0.1% | 2025-Q3 stale |
| WT Asset Management Ltd new | 194,351 | $5M | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.