Applied Optoelectronics, Inc. (AAOI) Ownership
AAOI ownership summary
as of October 18, 2026- Institutions
- 63.7% of shares outstanding
- Insiders
- 9.78% of shares outstanding
- Shares outstanding
- 84.9M
- Float
- 80.9M shares available to trade
- Short interest
- 16.92% 13.9M shares short
- Days to cover
- 2.07 short interest up 12.7% vs prior month
- Institutions 63.71%
- Insiders 9.78%
- Other investors 26.51%
AAOI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.60% | 6.5M | $487.4M | −742,059 (−10.3%) | June 30, 2026 |
| 2 | Amvescap Plc. | 4.02% | 3.4M | $258.0M | +1.4M (+69.5%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 3.96% | 3.4M | $254.1M | +301,479 (+9.8%) | June 30, 2026 |
| 4 | Marex Group Ltd | 3.33% | 2.8M | $213.9M | +2.5M (+878.8%) | June 30, 2026 |
| 5 | Vanguard Portfolio Management, LLC | 3.12% | 2.7M | $200.4M | +849,835 (+47.2%) | June 30, 2026 |
| 6 | UBS Group AG | 2.49% | 2.1M | $159.6M | +1.1M (+117.5%) | June 30, 2026 |
| 7 | Oberweis Asset Management Inc | 2.11% | 1.8M | $135.4M | −558,842 (−23.8%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 1.97% | 1.7M | $126.3M | +49,631 (+3.1%) | June 30, 2026 |
| 9 | Value Aligned Research Advisors LLC | 1.88% | 1.6M | $120.5M | +327,186 (+25.8%) | June 30, 2026 |
| 10 | The Goldman Sachs Group Inc | 1.87% | 1.6M | $119.9M | +501,689 (+46.2%) | June 30, 2026 |
| 11 | State Street Corp | 1.76% | 1.5M | $113.2M | −146,676 (−8.9%) | June 30, 2026 |
| 12 | Hood River Capital Management LLC | 1.64% | 1.4M | $105.2M | +116,991 (+9.2%) | June 30, 2026 |
| 13 | Clear Street Group Inc | 1.45% | 1.2M | $93.0M | +1.2M (0.0%) | June 30, 2026 |
| 14 | Morgan Stanley - Brokerage Accounts | 1.31% | 1.1M | $84.3M | +387,572 (+53.3%) | June 30, 2026 |
| 15 | JPMorgan Chase & Co | 1.26% | 1.1M | $80.7M | −42,886 (−3.9%) | June 30, 2026 |
| 16 | Frontier Capital Management CO Inc | 1.15% | 975K | $73.7M | +691,172 (+243.2%) | June 30, 2026 |
| 17 | Susquehanna International Group, LLP | 0.76% | 649K | $49.0M | +562,013 (+646.2%) | June 30, 2026 |
| 18 | Jane Street Group LLC | 0.66% | 564K | $42.6M | −1.7M (−75.3%) | June 30, 2026 |
| 19 | William Blair Investment Management, LLC | 0.59% | 504K | $38.1M | +504,202 (0.0%) | June 30, 2026 |
| 20 | Vanguard Fiduciary Trust Co | 0.58% | 489K | $36.9M | +41,240 (+9.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 10.6M shares and 5 cut 3.2M.
AAOI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.86% | 2.4M | $183.3M | −2,720 (−0.1%) | August 31, 2026 |
| 2 | Vanguard Small Cap Index | 2.13% | 1.8M | $136.6M | +911,889 (+101.8%) | September 30, 2026 |
| 3 | iShares A.I. Innovation and Tech Act ETF | 1.83% | 1.6M | $117.3M | — | September 30, 2026 |
| 4 | Oberweis Small-Cap Opportunities | 1.26% | 1.1M | $80.9M | — | June 30, 2026 |
| 5 | Vanguard MStar Small Cap Growth Indx Inv | 1.19% | 1.0M | $76.1M | +503,313 (+99.8%) | September 30, 2026 |
| 6 | Vanguard Information Technology ETF | 1.11% | 939K | $71.0M | +2,161 (+0.2%) | September 30, 2026 |
| 7 | Invesco Small Cap Value A | 1.06% | 900K | $68.0M | −469,817 (−34.3%) | August 31, 2026 |
| 8 | Hood River Small-Cap Growth Instl | 0.96% | 811K | $61.3M | −27,296 (−3.3%) | June 30, 2026 |
| 9 | Invesco Value Opportunities A | 0.90% | 761K | $57.5M | −339,048 (−30.8%) | August 31, 2026 |
| 10 | Oberweis Micro-Cap | 0.62% | 529K | $40.0M | −545,257 (−50.8%) | June 30, 2026 |
| 11 | iShares Russell Mid-Cap Growth ETF | 0.48% | 405K | $30.6M | −432 (−0.1%) | September 30, 2026 |
| 12 | Columbia Small Cap Growth Inst | 0.47% | 402K | $30.4M | +69,477 (+20.9%) | August 31, 2026 |
| 13 | Fidelity Extended Market Index | 0.44% | 372K | $28.1M | −1,998 (−0.5%) | August 31, 2026 |
| 14 | BGF Next Generation Technology Z2 | 0.36% | 308K | $23.2M | −9,804 (−3.1%) | June 30, 2026 |
| 15 | iShares Russell Mid-Cap ETF | 0.35% | 297K | $22.5M | +551 (+0.2%) | September 30, 2026 |
| 16 | Fidelity Mid Cap Index | 0.35% | 296K | $22.3M | +1,249 (+0.4%) | August 31, 2026 |
| 17 | iShares US Telecommunications ETF | 0.32% | 271K | $20.5M | — | September 30, 2026 |
| 18 | iShares Russell 1000 Growth ETF | 0.32% | 270K | $20.4M | −182 (−0.1%) | September 30, 2026 |
| 19 | Schwab US Mid-Cap ETF™ | 0.30% | 253K | $19.2M | +270 (+0.1%) | September 30, 2026 |
| 20 | Victory Pioneer Select Mid Cap Growth A | 0.26% | 221K | $16.7M | +221,162 (0.0%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AAOI insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-10 | Stefan J Murry | Sell | $136.50 | 4,000 | $546,000 |
| 2026-03-19 | David C Kuo | Sell | $100.13 | 29,000 | $2.9M |
| 2026-03-16 | Hung-Lun (Fred) Chang | Sell | $100.25 | 36,400 | $3.6M |
| 2026-03-10 | Stefan J Murry | Sell | $112.76 | 4,000 | $451,040 |
| 2026-03-09 | Min-Chu (Mike) Chen | Sell | $108.72 | 8,835 | $960,541 |
| 2026-03-09 | Shu-Hua (Joshua) Yeh | Sell | $97.10 | 50,000 | $4.9M |
| 2026-03-09 | William H Yeh | Sell | $105.76 | 15,000 | $1.6M |
| 2026-03-06 | Min-Chu (Mike) Chen | Sell | $97.00 | 2,500 | $242,500 |
| 2026-03-05 | Richard B Black | Sell | $95.00 | 3,231 | $306,945 |
| 2026-03-04 | Cynthia Delaney | Sell | $98.02 | 21,000 | $2.1M |
| 2026-03-03 | Elizabeth G Loboa | Sell | $95.76 | 102,347 | $9.8M |
| 2026-02-11 | David C Kuo | Sell | $50.17 | 17,467 | $876,319 |
| 2026-02-11 | Stefan J Murry | Sell | $50.25 | 11,693 | $587,573 |
| 2026-02-10 | David C Kuo | Sell | $50.00 | 2,533 | $126,650 |
| 2026-02-10 | Stefan J Murry | Sell | $49.17 | 6,327 | $311,099 |
| 2026-01-28 | David C Kuo | Sell | $45.05 | 12,000 | $540,600 |
| 2026-01-15 | Stefan J Murry | Sell | $35.01 | 66 | $2,311 |
| 2026-01-13 | Stefan J Murry | Sell | $35.00 | 934 | $32,690 |
| 2026-01-12 | Stefan J Murry | Sell | $33.75 | 3,000 | $101,250 |
| 2025-12-23 | David C Kuo | Sell | $40.15 | 12,500 | $501,875 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AAOI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AAOI
Institutional investors own 63.7% of Applied Optoelectronics's shares and insiders 9.78%. The largest holder is BlackRock Inc with 7.60% of the shares (6.5M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 5 reduced their stake in the latest filings. Short interest is 16.92% of the float, or 2.07 days of average trading volume. The share count rose 362.5% since 2014.
Related: AAOI analyst forecast, AAOI key metrics. See the AAOI stock overview for the latest quote and news.
AAOI ownership FAQ
Who owns the most Applied Optoelectronics stock?
The largest shareholders of Applied Optoelectronics are BlackRock Inc (7.60%), Amvescap Plc. (4.02%), Vanguard Capital Management, LLC (3.96%), Marex Group Ltd (3.33%), Vanguard Portfolio Management, LLC (3.12%).
What percentage of Applied Optoelectronics is owned by institutions?
Institutions hold 63.7% of Applied Optoelectronics's shares outstanding; insiders hold 9.78%.
Which funds own Applied Optoelectronics?
The largest fund holders of Applied Optoelectronics are Vanguard MStar Total Stk Mkt Idx Invest (2.86%), Vanguard Small Cap Index (2.13%), iShares A.I. Innovation and Tech Act ETF (1.83%), Oberweis Small-Cap Opportunities (1.26%), Vanguard MStar Small Cap Growth Indx Inv (1.19%).
What is Applied Optoelectronics's short interest?
13.9M shares of Applied Optoelectronics were sold short, 16.92% of the float; at the average daily volume it would take 2.07 days to cover.
Are insiders buying or selling Applied Optoelectronics?
Of the latest 20 reported insider transactions in Applied Optoelectronics (since December 23, 2025), 0 were purchases and 20 were sales.
How many shares of Applied Optoelectronics are outstanding?
Applied Optoelectronics has 84.9M shares outstanding, of which 80.9M are in the public float.