AAOI · Applied Optoelectronics, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 492 13F filersWho Holds AAOI
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 483 filers, like-for-like change -4.3%; actively managed books -7.3%; index-like books +1.7%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 40.7% | 251 | -13.7% |
| Exempt adviser | 1.4% | 11 | +21.4% |
| Adviser | 7.8% | 12 | +19.0% |
| Bank | 11.5% | 20 | +13.5% |
| Insurer | 0.1% | 3 | 0.0% |
| Broker-dealer | 0.3% | 2 | -12.8% |
| Benefit plan | 0.4% | 6 | +82.6% |
| Non-US | 1.4% | 10 | +13.1% |
| Holding company | 19.0% | 10 | -1.8% |
| Unknown | 17.3% | 158 | -4.4% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 35.6% | 42 | +1.7% |
| Systematic-like | 2.6% | 28 | -76.6% |
| Concentrated | 5.1% | 74 | +116.2% |
| Diversified active | 56.7% | 339 | +1.4% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 45.8% | 232 | -4.5% |
| Medium turnover | 30.3% | 126 | +16.3% |
| High turnover | 7.1% | 77 | -61.2% |
| Unknown | 16.8% | 48 | +40.2% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 18.3% | 76 | +34.1% |
| Medium horizon | 24.1% | 88 | +6.4% |
| Long horizon | 47.1% | 266 | -6.5% |
| Unknown | 10.4% | 53 | -41.1% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 2.3% | 130 | -14.6% |
| $1B to $10B | 10.0% | 151 | -20.3% |
| $10B to $100B | 24.0% | 129 | +27.7% |
| $100B or more | 63.7% | 73 | -9.6% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 3.7% | 138 | -6.7% |
| Pooled investment vehicles | 6.0% | 40 | -45.3% |
| Registered funds and BDCs | 24.8% | 29 | -6.8% |
| Pension and profit sharing plans | 0.0% | 3 | +150.4% |
| Insurance companies | 0.4% | 3 | -35.0% |
| Charitable organizations | 0.0% | 2 | +104.5% |
| Governments and sovereign funds | 0.9% | 8 | -49.4% |
| Corporations | 0.0% | 1 | 0.0% |
| Other investment advisers | 0.0% | 6 | +39.2% |
| Other | 0.1% | 3 | -9.9% |
| Diversified | 4.8% | 18 | +51.0% |
| Unknown | 59.3% | 232 | +3.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 8.2% | 59 | -42.2% |
| Private equity funds | 3.4% | 12 | +21.2% |
| Venture capital funds | 0.0% | 1 | -29.2% |
| Real estate funds | 0.0% | 6 | +496.8% |
| Liquidity funds | 0.0% | 2 | -23.3% |
| Securitized asset funds | 0.3% | 1 | +50.0% |
| Other private funds | 8.7% | 26 | -21.5% |
| Mixed private funds | 0.1% | 4 | -22.4% |
| Private funds, type not stated | 1.1% | 7 | +87.5% |
| No private funds | 20.3% | 144 | +5.0% |
| Unknown | 57.8% | 221 | +3.2% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 85.4% | 396 | -11.9% |
| Outside the US | 14.5% | 86 | +100.1% |
| Unknown | 0.1% | 1 | +16.5% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 5 holders with no observed 2026-03-31 13F and 5 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
52 13F filers, quarter ended Mar 31, 2023Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Estimated Holder Cost Basis
Quarter ended Mar 31, 2023, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 44.5% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shareholder Targets
13F filers that own its peers but not AAOI, quarter ended Mar 31, 2023AAOI has no holder-overlap peers, so these filers hold the largest Technology stocks: AAPL, MSFT, NVDA, AVGO, CSCO, CRM, ADBE, TXN, ACN, AMD, ORCL, INTU, QCOM, ADI, APH, INTC, NOW, AMAT, TSM, ADP. 5,305 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Berkshire Hathaway Inc Insurer, Concentrated | $150,975,906,990 1 held | AAPL |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active | $139,295,382,500 20 held | MSFT, AAPL, NVDA |
| 3 | BANK OF AMERICA CORP /DE/ Bank, Diversified active | $88,732,167,432 20 held | AAPL, MSFT, NVDA |
| 4 | NORGES BANK Non-US, Index-like | $87,782,190,148 20 held | AAPL, MSFT, NVDA |
| 5 | Capital World Investors Adviser, Diversified active | $61,660,621,317 14 held | MSFT, AVGO, AAPL |
| 6 | Capital International Investors Adviser, Diversified active | $59,718,176,954 15 held | MSFT, AVGO, AAPL |
| 7 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $55,127,663,497 20 held | MSFT, AAPL, TXN |
| 8 | Legal & General Group Plc Unknown, Index-like | $54,521,609,204 20 held | AAPL, MSFT, NVDA |
| 9 | Capital Research Global Investors Adviser, Diversified active | $52,548,232,658 16 held | MSFT, AVGO, AAPL |
| 10 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser, Diversified active | $51,941,451,838 19 held | AAPL, MSFT, AVGO |
Fund Ownership of AAOI by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 12.54% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 2.44% | 2,063,453 |
| Index ETFs | 10.10% | 8,544,658 |
| Active ETFs | 1.97% | 1,668,481 |
| Active funds | 7.07% | 5,976,038 |
| Unclassified | 0.37% | 310,104 |
| All registered funds | 21.95% | 18,562,734 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $955,671,994 | 9.19% | 6,450,270 | Shares | 2026-08-07 | |
| Mega Invesco Ltd. Adviser | $505,857,054 | 4.86% | 3,414,262 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $498,262,228 | 4.79% | 3,363,001 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $421,944,864 | 4.06% | 2,847,900 | Put | 2026-08-14 | |
| Large Marex Group plc | $419,333,098 | 4.03% | 2,830,272 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $404,432,352 | 3.89% | 2,729,700 | Put | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $394,624,160 | 3.79% | 2,663,500 | Call | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $392,878,538 | 3.78% | 2,651,718 | Shares | 2026-08-13 | |
| Large Marex Group plc | $370,400,000 | 3.56% | 2,500,000 | Put | 2026-08-14 | |
| Mega UBS Group AG Bank | $312,834,505 | 3.01% | 2,111,464 | Shares | 2026-08-13 | |
| Mid OBERWEIS ASSET MANAGEMENT INC/ Registered adviser | $265,373,376 | 2.55% | 1,791,127 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $247,565,876 | 2.38% | 1,670,936 | Shares | 2026-08-12 | |
| Large Value Aligned Research Advisors, LLC Registered adviser | $236,333,571 | 2.27% | 1,595,124 | Shares | 2026-08-17 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $235,048,875 | 2.26% | 1,586,453 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $221,886,934 | 2.13% | 1,497,617 | Shares | 2026-09-22 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $214,106,016 | 2.06% | 1,445,100 | Call | 2026-09-02 | |
| Large Hood River Capital Management LLC Registered adviser | $206,314,281 | 1.98% | 1,392,510 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $205,823,872 | 1.98% | 1,389,200 | Call | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $204,653,408 | 1.97% | 1,381,300 | Put | 2026-09-02 | |
| Large Clear Street Group Inc. | $182,406,146 | 1.75% | 1,231,143 | Shares | 2026-08-12 | |
| Mega MORGAN STANLEY Holding company | $165,218,843 | 1.59% | 1,115,138 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $158,271,324 | 1.52% | 1,068,246 | Shares | 2026-08-12 | |
| Large FRONTIER CAPITAL MANAGEMENT CO LLC Registered adviser | $144,503,114 | 1.39% | 975,318 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $96,153,765 | 0.92% | 648,986 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $83,496,604 | 0.80% | 563,557 | Shares | 2026-08-14 | |
| Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Registered adviser | $74,702,568 | 0.72% | 504,202 | Shares | 2026-08-12 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $72,438,683 | 0.70% | 488,922 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $70,528,160 | 0.68% | 476,027 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $66,672,000 | 0.64% | 450,000 | Call | 2026-08-03 | |
| Mega NORTHERN TRUST CORP Bank | $61,889,394 | 0.60% | 417,720 | Shares | 2026-08-13 | |
| Large Capula Management Ltd Exempt adviser | $56,411,771 | 0.54% | 380,749 | Shares | 2026-08-14 | |
| Large Marex Group plc | $56,300,800 | 0.54% | 380,000 | Call | 2026-08-14 | |
| Large Capula Management Ltd Exempt adviser | $56,300,800 | 0.54% | 380,000 | Put | 2026-08-14 | |
| Mid GILDER GAGNON HOWE & CO LLC Registered adviser | $50,820,954 | 0.49% | 343,014 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $48,907,616 | 0.47% | 330,100 | Put | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $48,018,656 | 0.46% | 324,100 | Call | 2026-08-14 | |
| Large Walleye Trading LLC | $46,892,640 | 0.45% | 316,500 | Put | 2026-08-03 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $45,919,523 | 0.44% | 309,932 | Shares | 2026-08-11 | |
| Large Walleye Trading LLC | $45,707,360 | 0.44% | 308,500 | Call | 2026-08-03 | |
| Large Focus Partners Wealth Registered adviser | $42,400,280 | 0.41% | 286,179 | Shares | 2026-08-12 | |
| Large Steward Partners Investment Advisory, LLC Registered adviser | $40,114,468 | 0.39% | 270,751 | Shares | 2026-08-13 | |
| Large TUDOR INVESTMENT CORP ET AL Registered adviser | $38,758,656 | 0.37% | 261,600 | Call | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $37,338,246 | 0.36% | 252,013 | Shares | 2026-08-13 | |
| Large WESTFIELD CAPITAL MANAGEMENT CO LP Registered adviser | $36,973,772 | 0.36% | 249,553 | Shares | 2026-08-12 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $36,163,038 | 0.35% | 244,081 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $36,032,067 | 0.35% | 243,197 | Shares | 2026-08-07 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $35,945,393 | 0.35% | 242,612 | Shares | 2026-08-13 | |
| Mega RAYMOND JAMES FINANCIAL INC | $34,836,414 | 0.33% | 235,127 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $33,712,177 | 0.32% | 227,539 | Shares | 2026-08-14 | |
| Large IMC-Chicago, LLC | $33,105,166 | 0.32% | 223,442 | Shares | 2026-08-06 | |
| Mega Bank of New York Mellon Corp Bank | $32,567,341 | 0.31% | 219,812 | Shares | 2026-08-06 | |
| Large Point72 Asset Management, L.P. Registered adviser | $31,706,240 | 0.30% | 214,000 | Call | 2026-08-14 | |
| Mid EMERALD ADVISERS, LLC Registered adviser | $31,346,803 | 0.30% | 211,574 | Shares | 2026-08-05 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $31,332,875 | 0.30% | 211,480 | Shares | 2026-08-14 | |
| Large NOMURA HOLDINGS INC | $29,632,000 | 0.28% | 200,000 | Call | 2026-08-14 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $27,928,160 | 0.27% | 188,500 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $26,874,593 | 0.26% | 181,389 | Shares | 2026-08-13 | |
| Mega Nuveen, LLC | $26,872,815 | 0.26% | 181,377 | Shares | 2026-08-11 | |
| Large Balyasny Asset Management L.P. Registered adviser | $26,029,193 | 0.25% | 175,683 | Shares | 2026-08-14 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $24,004,437 | 0.23% | 162,017 | Shares | 2026-08-12 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $23,439,502 | 0.23% | 158,204 | Shares | 2026-08-13 | |
| Mid Weiss Asset Management LP Registered adviser | $22,500,762 | 0.22% | 151,868 | Shares | 2026-08-14 | |
| Mega Swiss National Bank | $21,927,680 | 0.21% | 148,000 | Shares | 2026-08-11 | |
| Large Jain Global LLC Registered adviser | $21,622,174 | 0.21% | 145,938 | Shares | 2026-08-14 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC Registered adviser | $21,186,880 | 0.20% | 143,000 | Shares | 2026-08-14 | |
| Large Driehaus Capital Management LLC Registered adviser | $20,655,874 | 0.20% | 139,416 | Shares | 2026-08-14 | |
| Mid EMERALD MUTUAL FUND ADVISERS TRUST Registered adviser | $20,291,845 | 0.20% | 136,959 | Shares | 2026-08-05 | |
| Large Point72 Asset Management, L.P. Registered adviser | $19,794,176 | 0.19% | 133,600 | Put | 2026-08-14 | |
| Mega NORGES BANK Non-US | $19,438,592 | 0.19% | 131,200 | Shares | 2026-08-12 | |
| Mid Shellback Capital, LP Registered adviser | $19,409,552 | 0.19% | 131,004 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $19,226,575 | 0.18% | 129,769 | Shares | 2026-08-11 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $18,716,460 | 0.18% | 126,326 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $18,505,184 | 0.18% | 124,900 | Put | 2026-08-14 | |
| Small Funde Sino Life Insurance Co Ltd | $17,824,536 | 0.17% | 120,306 | Shares | 2026-07-30 | |
| Mid Oak Grove Capital LLC Registered adviser | $17,757,614 | 0.17% | 178,900 | Shares | 2026-10-09 | |
| Mega ROYAL BANK OF CANADA Bank | $17,002,542 | 0.16% | 114,758 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC Registered adviser | $16,953,800 | 0.16% | 114,429 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $16,435,832 | 0.16% | 110,933 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC Registered adviser | $16,422,498 | 0.16% | 110,843 | Shares | 2026-08-13 | |
| Mid GROUP ONE TRADING LLC Broker-dealer | $16,351,233 | 0.16% | 110,362 | Shares | 2026-08-14 | |
| Large SILVERCREST ASSET MANAGEMENT GROUP LLC Registered adviser | $15,839,933 | 0.15% | 106,911 | Shares | 2026-08-14 | |
| Large LORD, ABBETT & CO. LLC Registered adviser | $15,364,192 | 0.15% | 103,700 | Shares | 2026-08-14 | |
| Mid UNICOM Systems, Inc. | $15,135,462 | 0.15% | 152,483 | Shares | 2026-10-13 | |
| Large FRED ALGER MANAGEMENT, LLC Registered adviser | $15,087,280 | 0.15% | 101,831 | Shares | 2026-08-14 | |
| Large FEDERATED HERMES, INC. Adviser | $14,859,855 | 0.14% | 100,296 | Shares | 2026-08-12 | |
| Large Tidal Investments LLC Registered adviser | $14,075,200 | 0.14% | 95,000 | Call | 2026-08-13 | |
| Mega SEI INVESTMENTS CO | $13,272,765 | 0.13% | 89,584 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $12,681,310 | 0.12% | 85,592 | Shares | 2026-08-24 | |
| Large NOMURA HOLDINGS INC | $12,341,431 | 0.12% | 83,298 | Shares | 2026-08-14 | |
| Large COMMONWEALTH EQUITY SERVICES, LLC Registered adviser | $11,439,878 | 0.11% | 77,213 | Shares | 2026-07-29 | |
| Small 1492 Capital Management LLC Registered adviser | $11,320,164 | 0.11% | 76,405 | Shares | 2026-08-11 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $11,241,195 | 0.11% | 75,872 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $10,785,751 | 0.10% | 72,798 | Shares | 2026-09-02 | |
| Mid Zweig-DiMenna Associates LLC | $10,643,073 | 0.10% | 71,835 | Shares | 2026-08-13 | |
| Large FIFTH THIRD BANCORP Bank | $10,509,285 | 0.10% | 70,932 | Shares | 2026-08-05 | |
| Mega Russell Investments Group, Ltd. | $10,360,234 | 0.10% | 69,926 | Shares | 2026-08-06 | |
| Large Alphadyne Asset Management LP Registered adviser | $10,208,224 | 0.10% | 68,900 | Put | 2026-08-14 | |
| Large Squarepoint Ops LLC Registered adviser | $10,134,144 | 0.10% | 68,400 | Put | 2026-08-14 | |
| Large PEAK6 LLC Broker-dealer | $10,074,880 | 0.10% | 68,000 | Call | 2026-08-13 | |
| Mega Allianz Asset Management GmbH | $9,437,792 | 0.09% | 63,700 | Put | 2026-09-02 |
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