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-Q2 13F filings (latest filed 2026-09-22). 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
233 tracked funds added or opened AAOI while 96 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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 2026-Q1 and 2026-Q2, across 459 tracked filers holding AAOI, 297 increased or opened the position and 218 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 2026-Q1 and 2026-Q2 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 77
- Clear Street Group Inc.$182M
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$75M
- Capula Management Ltd$56M
- WESTFIELD CAPITAL MANAGEMENT CO LP$37M
- CANADA PENSION PLAN INVESTMENT BOARD$28M
- ABSOLUTE INVESTMENT ADVISERS, LLC$25M
Full exits 47
- T. Rowe Price Investment Management, Inc.$54M
- RENAISSANCE TECHNOLOGIES LLC$48M
- Artemis Investment Management LLP$29M
- Point72 Asset Management, L.P.$22M
- Bridgewater Associates, LP$19M
- SG Americas Securities, LLC$17M
Largest adds
- BlackRock, Inc.$448M
- Marex Group Ltd$395M
- Invesco Ltd.$343M
- VANGUARD PORTFOLIO MANAGEMENT LLC$240M
- VANGUARD CAPITAL MANAGEMENT LLC$239M
- UBS Group AG$231M
Largest trims
- D. E. Shaw & Co., Inc.$173M
- PRICE T ROWE ASSOCIATES INC /MD/$130M
- JANE STREET GROUP, LLC$109M
- Driehaus Capital Management LLC$33M
- TUDOR INVESTMENT CORP ET AL$28M
- RAYMOND JAMES FINANCIAL INC$27M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ABSOLUTE INVESTMENT ADVISERS, LLC new | 7,000,000 | $25M | 0.4% | 2026-Q2 |
| BlackRock, Inc. added | 6,450,270 | $956M | 13.4% | 2026-Q2 |
| Invesco Ltd. added | 3,414,262 | $506M | 7.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 3,363,001 | $498M | 7.0% | 2026-Q2 |
| Marex Group Ltd added | 2,830,272 | $419M | 5.9% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 2,651,718 | $393M | 5.5% | 2026-Q2 |
| UBS Group AG added | 2,111,464 | $313M | 4.4% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ trimmed | 1,791,127 | $265M | 3.7% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,670,936 | $248M | 3.5% | 2026-Q2 |
| Value Aligned Research Advisors, LLC added | 1,595,124 | $236M | 3.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 1,586,453 | $235M | 3.3% | 2026-Q2 |
| STATE STREET CORP trimmed | 1,497,617 | $222M | 3.1% | 2026-Q2 |
| Hood River Capital Management LLC added | 1,392,510 | $206M | 2.9% | 2026-Q2 |
| Clear Street Group Inc. new | 1,231,143 | $182M | 2.6% | 2026-Q2 |
| MORGAN STANLEY added | 1,115,138 | $165M | 2.3% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 1,068,246 | $161M | 2.3% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 975,318 | $145M | 2.0% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 648,986 | $96M | 1.4% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 563,557 | $83M | 1.2% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC new | 504,202 | $75M | 1.0% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 488,922 | $72M | 1.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 476,027 | $71M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 417,720 | $62M | 0.9% | 2026-Q2 |
| Capula Management Ltd new | 380,749 | $56M | 0.8% | 2026-Q2 |
| GILDER GAGNON HOWE & CO LLC trimmed | 343,014 | $51M | 0.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 309,932 | $46M | 0.6% | 2026-Q2 |
| Focus Partners Wealth trimmed | 286,179 | $42M | 0.6% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC trimmed | 270,751 | $40M | 0.6% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 252,013 | $37M | 0.5% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP trimmed | 249,553 | $37M | 0.5% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 244,081 | $36M | 0.5% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 243,197 | $36M | 0.5% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 242,612 | $36M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 235,127 | $35M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 227,539 | $34M | 0.5% | 2026-Q2 |
| IMC-Chicago, LLC added | 223,442 | $33M | 0.5% | 2026-Q2 |
| Bank of New York Mellon Corp added | 219,812 | $33M | 0.5% | 2026-Q2 |
| EMERALD ADVISERS, LLC trimmed | 211,574 | $31M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 211,480 | $31M | 0.4% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 188,500 | $28M | 0.4% | 2026-Q2 |
| MARSHALL WACE, LLP added | 181,389 | $27M | 0.4% | 2026-Q2 |
| Nuveen, LLC trimmed | 181,377 | $27M | 0.4% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 175,683 | $26M | 0.4% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 162,017 | $24M | 0.3% | 2026-Q2 |
| Oak Grove Capital LLC added | 159,150 | $24M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 158,204 | $23M | 0.3% | 2026-Q2 |
| UNICOM Systems, Inc. added | 152,483 | $23M | 0.3% | 2026-Q2 |
| Weiss Asset Management LP new | 151,868 | $23M | 0.3% | 2026-Q2 |
| Swiss National Bank added | 148,000 | $22M | 0.3% | 2026-Q2 |
| Jain Global LLC added | 145,938 | $22M | 0.3% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 143,000 | $21M | 0.3% | 2026-Q2 |
| Driehaus Capital Management LLC trimmed | 139,416 | $21M | 0.3% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST trimmed | 136,959 | $20M | 0.3% | 2026-Q2 |
| NORGES BANK new | 131,200 | $19M | 0.3% | 2026-Q2 |
| Shellback Capital, LP added | 131,004 | $19M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 129,769 | $19M | 0.3% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 126,326 | $19M | 0.3% | 2026-Q2 |
| Funde Sino Life Insurance Co Ltd new | 120,306 | $18M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 114,758 | $17M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 114,429 | $17M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 110,933 | $16M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 110,843 | $16M | 0.2% | 2026-Q2 |
| GROUP ONE TRADING LLC trimmed | 110,362 | $16M | 0.2% | 2026-Q2 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 106,911 | $16M | 0.2% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC new | 101,831 | $15M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 100,296 | $15M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 89,584 | $13M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 85,592 | $13M | 0.2% | 2026-Q2 |
| NOMURA HOLDINGS INC added | 83,298 | $12M | 0.2% | 2026-Q2 |
| COMMONWEALTH EQUITY SERVICES, LLC trimmed | 77,213 | $11M | 0.2% | 2026-Q2 |
| 1492 Capital Management LLC trimmed | 76,405 | $11M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 75,872 | $11M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 72,798 | $11M | 0.2% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 72,164 | $11M | 0.2% | 2026-Q2 |
| Zweig-DiMenna Associates LLC trimmed | 71,835 | $11M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP added | 70,932 | $11M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 69,926 | $10M | 0.1% | 2026-Q2 |
| Global Trust Asset Management, LLC added | 69,849 | $10M | 0.1% | 2026-Q2 |
| Legal & General Group Plc trimmed | 63,555 | $9M | 0.1% | 2026-Q2 |
| AXIOM INVESTORS LLC /DE trimmed | 63,178 | $9M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 61,806 | $9M | 0.1% | 2026-Q2 |
| CITIGROUP INC trimmed | 60,912 | $9M | 0.1% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 60,695 | $9M | 0.1% | 2026-Q2 |
| FirstWave Capital Management LLC added | 58,277 | $9M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 57,532 | $9M | 0.1% | 2026-Q2 |
| Timothy G. Youngquist 2020 Irrevocable Trust added | 55,796 | $8M | 0.1% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 55,769 | $8M | 0.1% | 2026-Q2 |
| OAK RIDGE INVESTMENTS LLC added | 55,730 | $8M | 0.1% | 2026-Q2 |
| Greenwoods Asset Management Hong Kong Ltd. new | 53,520 | $8M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 53,505 | $8M | 0.1% | 2026-Q2 |
| Kultura Capital Management LP added | 53,345 | $8M | 0.1% | 2026-Q2 |
| Emerald Investment Advisers, LLC trimmed | 53,055 | $8M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 52,733 | $8M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 50,726 | $8M | 0.1% | 2026-Q2 |
| NEXT CENTURY GROWTH INVESTORS LLC trimmed | 49,989 | $7M | 0.1% | 2026-Q2 |
| Fund Resources Investment Holding Group Co Ltd new | 49,988 | $7M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 49,525 | $7M | 0.1% | 2026-Q2 |
| FORA Capital, LLC added | 48,974 | $7M | 0.1% | 2026-Q2 |
| SHARIAPORTFOLIO, INC. added | 48,698 | $7M | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 46,832 | $7M | 0.1% | 2026-Q2 |
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.