XOOMAR

APPLIED OPTOELECTRONICS, INC. (AAOI)

Every FINRA and SEC series the site collects for APPLIED OPTOELECTRONICS, INC.: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on Nasdaq, classified by the SEC as semiconductors & related devices.

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10.4M

Short interest

settlement 2026-08-14

1.0

Days to cover

-0.1% vs prior

53.4%

Short share of volume

2026-09-11

93,371

Fails to deliver

settlement 2026-08-13

-$14.6M

Insider flow, 90 days

0 buys, 9 sells

As of 2026-09-11.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 14 August 2026, short interest in AAOI is 10,421,985 shares, up 484,990 shares over the last month. Over the last 48 readings it ranged from 8,415,378 shares (31 December 2024) to 14,389,524 shares (28 November 2025). At the reported average volume of 15.1M shares a day that is 1.0 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-1410,421,985-0.1%15,117,6341.00
2026-07-3110,434,298+5.0%8,703,6011.20
2026-07-159,936,995-7.6%8,725,2131.14
2026-06-3010,756,408+5.1%12,803,1131.00
2026-06-1510,232,545+2.0%15,531,4851.00
2026-05-2910,036,132+7.5%10,443,0841.00
2026-05-159,333,296-7.9%13,209,2461.00
2026-04-3010,132,671+0.0%9,249,3831.10
2026-04-1510,132,357+10.4%14,461,3521.00
2026-03-319,181,438-10.9%12,156,5631.00
2026-03-1310,301,269-2.5%14,447,3451.00
2026-02-2710,560,298-0.6%6,230,8451.69
2026-02-1310,621,763-8.2%5,093,7612.09
2026-01-3011,565,357-3.8%5,648,6892.05
2026-01-1512,019,130-1.8%4,833,0092.49
2025-12-3112,234,802-3.7%4,562,2682.68
2025-12-1512,707,289-11.7%5,182,6342.45
2025-11-2814,389,524+11.8%4,558,9073.16
2025-11-1412,875,872+5.3%6,786,4381.90
2025-10-3112,222,308-6.3%4,784,4482.55
2025-10-1513,051,361-3.5%5,614,2372.32
2025-09-3013,521,211+10.8%4,531,9692.98
2025-09-1512,200,411-5.9%5,101,1612.39
2025-08-2912,969,044+8.7%5,412,1662.40

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of AAOI volume is 53.4%, up 5.1 points over the last five sessions. Over the last 52 readings it ranged from 30.9% (16 July 2026) to 65.4% (17 August 2026). The latest reading is in line with the 30-session average of 55.1%, on 1.9M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-111.0M1.9M53.4%663
2026-09-101.5M2.3M63.7%4,805
2026-09-091.5M2.6M56.8%2,153
2026-09-082.6M4.9M52.8%27,643
2026-09-041.5M3.1M49.6%14,731
2026-09-031.3M2.7M48.3%9,183
2026-09-02925K1.8M51.2%1,377
2026-09-011.0M1.8M56.4%5,110
2026-08-311.1M2.0M56.0%4,522
2026-08-281.3M2.6M50.2%2,473
2026-08-271.6M2.6M59.5%3,782
2026-08-26927K1.8M50.1%3,738
2026-08-251.6M2.6M59.3%163,437
2026-08-243.5M6.3M54.7%389,736
2026-08-211.6M3.2M50.9%7,070
2026-08-202.2M4.6M48.3%3,379
2026-08-192.1M4.9M42.3%332,204
2026-08-183.3M6.0M54.9%271,841
2026-08-174.1M6.3M65.4%6,357
2026-08-144.1M8.1M50.1%8,981
2026-08-132.6M4.6M55.5%2,868
2026-08-123.2M5.7M56.1%845
2026-08-112.0M3.7M54.8%1,718
2026-08-104.9M8.0M60.7%5,481
2026-08-075.9M10.2M57.9%22,057
2026-08-063.1M4.8M64.5%7,063
2026-08-053.2M5.0M64.1%5,184
2026-08-044.2M7.1M58.9%3,239
2026-08-032.8M4.9M57.1%1,592
2026-07-312.0M4.0M50.3%6,432

Fails to deliver

SEC, by settlement date. JSON

As of 13 August 2026, the fails-to-deliver balance in AAOI is 93,371 shares, up 30,318 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (15 June 2026) to 1,286,324 shares (3 March 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-1393,371$138.08$12.9M
2026-08-1263,053$134.33$8.5M
2026-08-1014,829$135.63$2.0M
2026-08-0725,740$124.22$3.2M
2026-08-06106,356$128.56$13.7M
2026-08-03118$94.32$11K
2026-07-311,254$90.11$113K
2026-07-28256$97.82$25K
2026-07-2768,120$100.15$6.8M
2026-07-24394$112.02$44K
2026-07-23940$110.52$104K
2026-07-221,136$119.26$135K
2026-07-20821$102.41$84K
2026-07-171,773$100.24$178K
2026-07-1484,982$111.88$9.5M
2026-07-102,132$122.21$261K
2026-07-086,420$114.41$735K
2026-07-0648,907$120.95$5.9M
2026-06-30227,574$150.10$34.2M
2026-06-2991,530$135.69$12.4M
2026-06-2693$138.54$13K
2026-06-22487,193$161.85$78.9M
2026-06-1841,644$167.34$7.0M
2026-06-16101,727$191.55$19.5M
2026-06-151$169.05$169
2026-06-123,011$172.78$520K
2026-06-11995$175.13$174K
2026-06-104,728$162.88$770K
2026-06-0522,885$202.89$4.6M
2026-06-032$202.37$405

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Insiders at AAOI reported 9 open-market sells worth $14.6M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Murry Stefan J. (Chief Financial Officer) on 2026-09-10.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-10Murry Stefan J.Chief Financial OfficerSell4K$105.33$421K367K
2026-09-08Chang Hung-Lun (Fred)*** See RemarksSell32K$110.21$3.5M249K
2026-08-18Yeh Shu-Hua (Joshua)*** See RemarksSell6K$147.73$886K377K
2026-08-10Murry Stefan J.Chief Financial OfficerSell4K$144.79$579K371K
2026-08-04Yeh Shu-Hua (Joshua)*** See RemarksSell5K$126.50$596K383K
2026-07-31Lin Chih-Hsiang (Thompson)President and CEOGrant9K$0.00$01.3M
2026-07-22Kuo David C*** See RemarksTax withholding407$119.26$49K146K
2026-07-22Kuo David C*** See RemarksTax withholding516$119.26$62K146K
2026-07-22Kuo David C*** See RemarksTax withholding472$119.26$56K147K
2026-07-22Kuo David C*** See RemarksTax withholding2K$119.26$223K147K
2026-07-22Murry Stefan J.Chief Financial OfficerTax withholding770$119.26$92K375K
2026-07-22Murry Stefan J.Chief Financial OfficerTax withholding988$119.26$118K376K
2026-07-22Murry Stefan J.Chief Financial OfficerTax withholding679$119.26$81K377K
2026-07-22Murry Stefan J.Chief Financial OfficerTax withholding3K$119.26$354K378K
2026-07-22Chang Hung-Lun (Fred)*** See RemarksTax withholding616$119.26$73K281K
2026-07-22Chang Hung-Lun (Fred)*** See RemarksTax withholding773$119.26$92K280K
2026-07-22Chang Hung-Lun (Fred)*** See RemarksTax withholding613$119.26$73K283K
2026-07-22Chang Hung-Lun (Fred)*** See RemarksTax withholding3K$119.26$319K283K
2026-07-22Lin Chih-Hsiang (Thompson)President and CEOTax withholding2K$119.26$242K1.3M
2026-07-22Lin Chih-Hsiang (Thompson)President and CEOTax withholding3K$119.26$301K1.3M
2026-07-22Lin Chih-Hsiang (Thompson)President and CEOTax withholding2K$119.26$278K1.3M
2026-07-22Lin Chih-Hsiang (Thompson)President and CEOTax withholding9K$119.26$1.0M1.3M
2026-07-22Yeh Shu-Hua (Joshua)*** See RemarksTax withholding686$119.26$82K388K
2026-07-22Yeh Shu-Hua (Joshua)*** See RemarksTax withholding861$119.26$103K389K
2026-07-22Yeh Shu-Hua (Joshua)*** See RemarksTax withholding609$119.26$73K390K
2026-07-22Yeh Shu-Hua (Joshua)*** See RemarksTax withholding3K$119.26$304K390K
2026-07-21Yeh Shu-Hua (Joshua)*** See RemarksSell1K$120.02$154K393K
2026-07-10Murry Stefan J.Chief Financial OfficerSell4K$122.09$488K381K
2026-06-18Yeh Shu-Hua (Joshua)*** See RemarksSell6K$171.89$1.0M394K
2026-06-17Chang Hung-Lun (Fred)*** See RemarksSell40K$170.60$6.9M286K
2026-06-12Yeh Shu-Hua (Joshua)*** See RemarksSell29K$166.53$4.8M400K
2026-06-12Yeh Shu-Hua (Joshua)*** See RemarksTax withholding23K$172.78$4.0M429K
2026-06-12Murry Stefan J.Chief Financial OfficerSell33K$166.53$5.5M385K
2026-06-12Murry Stefan J.Chief Financial OfficerTax withholding30K$172.78$5.2M418K
2026-06-12Lin Chih-Hsiang (Thompson)President and CEOSell59K$166.53$9.8M1.3M
2026-06-12Lin Chih-Hsiang (Thompson)President and CEOTax withholding87K$172.78$15.0M1.4M
2026-06-12Kuo David C*** See RemarksSell29K$166.53$4.9M149K
2026-06-12Kuo David C*** See RemarksTax withholding19K$172.78$3.3M178K
2026-06-12Chang Hung-Lun (Fred)*** See RemarksSell34K$166.53$5.7M326K
2026-06-12Chang Hung-Lun (Fred)*** See RemarksTax withholding27K$172.78$4.7M360K
2026-06-10Murry Stefan J.Chief Financial OfficerSell4K$171.45$686K448K
2026-06-09Yeh William Hn/aGrant1K$0.00$0240K
2026-06-09Lin Che-Wein/aGrant1K$0.00$0255K
2026-06-09Flanagan Robert Jamesn/aGrant1K$0.00$01K
2026-06-09DeLaney Cynthian/aGrant1K$0.00$061K
2026-06-09Chen Min-Chu (Mike)n/aGrant1K$0.00$0162K
2026-06-09BLACK RICHARD Bn/aGrant1K$0.00$0166K
2026-06-05Chang Hung-Lun (Fred)*** See RemarksSell4K$200.07$800K388K
2026-06-04Yeh Shu-Hua (Joshua)*** See RemarksSell5K$204.75$1.0M457K
2026-06-02Chen Min-Chu (Mike)n/aSell8K$201.00$1.7M161K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.

Planned sales (Form 144)

Newest first. JSON

6 Form 144 notices on file for AAOI worth $6.2M at the prices reported; 6 in the last 90 days worth $6.2M. Latest: Murry Stefan J. filed on 2026-09-10 to sell 4,000 shares ($421K) from 2026-09-10.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-10Murry Stefan J.Officer4K$421K0.005%2026-09-10Raymond James and Associates
2026-09-09Chang Hung-Lun (Fred)Officer32K$3.5M0.038%2026-09-08Raymond James & Associates, Inc.
2026-08-18Yeh Shu-Hua (Joshua)Officer6K$886K0.007%2026-08-18Raymond James and Associates Inc.
2026-08-10Murry Stefan J.Officer4K$579K0.005%2026-08-10Raymond James & Associates
2026-08-04Yeh Shu-Hua (Joshua)Officer5K$596K0.006%2026-08-04Raymond James & Associates
2026-07-21Yeh Shu-Hua (Joshua)Officer1K$154K0.002%2026-07-21Raymond James & Associates

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

1 holder above 5% has filed on AAOI, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 5.4% of the class (4,342,797 shares), filed 2026-07-27 for an event on 2026-06-30.

FiledFormHolderSharesOf classEvent
2026-07-2713G/Ano. 1BlackRock, Inc.parent holding company4.3M5.4%2026-06-30

13F holders

Tracked managers holding AAOI at their latest 13F. JSON

7 of the 30 tracked managers held AAOI at their latest 13F, $727.0M in total at quarter-end prices. Citadel Advisors is the largest at $429.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 3 cut.

FundQuarterSharesValueOf portfolioChange in shares
Citadel Advisors2026-06-302.9M$429.5M0.05%+408K
D. E. Shaw & Co.2026-06-30695K$103.0M0.05%-22.4M
D. E. Shaw & Co.2026-06-3023.1M$82.6M0.04%+22.4M
Point72 Asset Management2026-06-30348K$51.5M0.06%-153K
Millennium Management2026-06-30268K$39.6M0.01%new or n/a
Two Sigma Investments2026-06-3090K$13.3M0.01%-251K
AQR Capital Management2026-06-3050K$7.3M0.00%+19K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 2026 (quarter ended 2026-06-30) APPLIED OPTOELECTRONICS, INC. reported revenue of $191.9M, up 86.4% from the same quarter a year earlier, and net loss of $22.8M (-0.28 diluted EPS). In FY 2025 it generated -$174.4M of operating cash flow. As of 2026-06-30, cash was $499.7M against $1.7M of debt.

Cash
$499.7M
Debt
$1.7M
Equity
$1.67B
Total assets
$2.30B
Shares outstanding
84,569,237

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30$191.9M-$22.8M-11.9%-0.28
Q1 20262026-03-31$151.1M-$14.3M-9.4%-0.19
Q4 2025derived2025-12-31$134.3Mn/an/an/a
Q3 20252025-09-30$118.6M-$17.9M-15.1%-0.28
Q2 20252025-06-30$103.0M-$9.1M-8.8%-0.16
Q1 20252025-03-31$99.9M-$9.2M-9.2%-0.18
Q4 2024derived2024-12-31$100.3Mn/an/an/a
Q3 20242024-09-30$65.2M-$17.8M-27.3%-0.42

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$455.7Mn/a-$174.4M$179.1Mn/an/a
FY 20242024-12-31$249.4Mn/a-$69.5M$43.4Mn/an/a
FY 20232023-12-31$217.6Mn/a-$7.9M$9.1Mn/an/a
FY 20222022-12-31$222.8Mn/a-$14.0M$3.2Mn/an/a
FY 20212021-12-31$211.6Mn/a-$11.6M$8.0Mn/an/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-08-03 from the cover page.

What this page is

APPLIED OPTOELECTRONICS, INC. in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows APPLIED OPTOELECTRONICS, INC. (AAOI), SEC CIK 1158114, listed on Nasdaq, classified by the SEC as semiconductors & related devices. The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-14.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-13.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-10.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-07-27.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-10.JSON and CSV
Company record
EDGAR filing index for CIK 1158114Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 13 Sep 05:40 UTC.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Datasets

Frequently Asked Questions

How much of AAOI is sold short?
10,421,985 shares were held short at the 2026-08-14 settlement, 1.0 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is AAOI's daily short volume?
On 2026-09-11, 1,035,224 of the 1,939,104 AAOI shares reported to FINRA were sold short, 53.4% of the day's reported volume. Short volume is a flow for one day, not a position.
Does AAOI have fails to deliver?
The SEC's latest file shows 93,371 AAOI shares failed to deliver at settlement 2026-08-13. Fails are reported per settlement date and published twice a month with a lag.
Are AAOI insiders buying or selling?
Insiders at AAOI reported 9 open-market sells worth $14.6M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Murry Stefan J. (Chief Financial Officer) on 2026-09-10.
Have AAOI insiders filed to sell?
6 Form 144 notices on file for AAOI worth $6.2M at the prices reported; 6 in the last 90 days worth $6.2M. Latest: Murry Stefan J. filed on 2026-09-10 to sell 4,000 shares ($421K) from 2026-09-10.
Who owns more than 5% of AAOI?
1 holder above 5% has filed on AAOI, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 5.4% of the class (4,342,797 shares), filed 2026-07-27 for an event on 2026-06-30.
What did AAOI report last quarter?
In Q2 2026 (quarter ended 2026-06-30) APPLIED OPTOELECTRONICS, INC. reported revenue of $191.9M, up 86.4% from the same quarter a year earlier, and net loss of $22.8M (-0.28 diluted EPS). In FY 2025 it generated -$174.4M of operating cash flow. As of 2026-06-30, cash was $499.7M against $1.7M of debt.
Which funds hold AAOI?
7 of the 30 tracked managers held AAOI at their latest 13F, $727.0M in total at quarter-end prices. Citadel Advisors is the largest at $429.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 3 cut.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.