XOOMAR

AMKOR TECHNOLOGY, INC. (AMKR)

Every FINRA and SEC series the site collects for AMKOR TECHNOLOGY, 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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9.6M

Short interest

settlement 2026-08-14

2.6

Days to cover

+7.9% vs prior

63.2%

Short share of volume

2026-09-11

7,163

Fails to deliver

settlement 2026-08-12

-$4.4M

Insider flow, 90 days

0 buys, 10 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 AMKR is 9,634,298 shares, up 962,016 shares over the last month. Over the last 48 readings it ranged from 3,182,912 shares (30 August 2024) to 9,724,705 shares (15 January 2026). The latest reading sits at the top of that range. At the reported average volume of 3.8M shares a day that is 2.6 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-149,634,298+7.9%3,762,4832.56
2026-07-318,926,978+2.9%7,352,8421.21
2026-07-158,672,282-2.0%4,684,1301.85
2026-06-308,847,679-3.0%6,938,1281.28
2026-06-159,125,802+9.5%5,881,6291.55
2026-05-298,331,411+11.8%4,959,4791.68
2026-05-157,450,328+1.4%5,047,1521.48
2026-04-307,350,218-15.3%5,385,7571.36
2026-04-158,680,947+0.9%2,913,3552.98
2026-03-318,602,090+5.9%3,524,9812.44
2026-03-138,121,170-2.5%3,692,0722.20
2026-02-278,333,478-3.0%4,354,3041.91
2026-02-138,588,073+3.4%6,239,7271.38
2026-01-308,306,875-14.6%3,496,7992.38
2026-01-159,724,705+30.3%5,284,7291.84
2025-12-317,465,030-11.1%2,588,0722.88
2025-12-158,396,292-5.0%4,060,5842.07
2025-11-288,837,895+8.0%2,816,7263.14
2025-11-148,184,863+36.7%3,942,0472.08
2025-10-315,988,545+19.6%3,397,8081.76
2025-10-155,007,533+19.4%2,800,7381.79
2025-09-304,195,227-14.0%2,763,4851.52
2025-09-154,880,707-14.0%2,145,9522.27
2025-08-295,676,946+0.3%1,610,3003.53

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of AMKR volume is 63.2%, up 24.4 points over the last five sessions. Over the last 52 readings it ranged from 33.8% (11 August 2026) to 67.6% (10 September 2026). The latest reading is 14.5 points above the 30-session average of 48.7%, on 1.2M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-11733K1.2M63.2%503
2026-09-101.0M1.5M67.6%389
2026-09-09996K1.8M54.0%0
2026-09-081.4M2.7M51.6%818
2026-09-04989K1.8M55.6%0
2026-09-03578K1.5M38.8%1,819
2026-09-02748K1.4M52.9%1,894
2026-09-01720K1.4M50.1%3,457
2026-08-31505K1.2M41.5%0
2026-08-28880K2.0M44.9%852
2026-08-27768K2.1M36.9%100
2026-08-26716K1.9M38.0%14,763
2026-08-25701K1.7M42.3%0
2026-08-24741K2.0M37.3%582
2026-08-21745K1.3M56.3%4,220
2026-08-20924K2.0M46.9%861
2026-08-191.1M2.8M40.1%41,096
2026-08-181.0M2.3M45.3%60,889
2026-08-17870K1.5M59.4%375
2026-08-14549K1.2M47.7%9,231
2026-08-13651K1.4M45.5%11,058
2026-08-121.2M1.9M64.9%2,510
2026-08-11401K1.2M33.8%1,009
2026-08-10557K1.3M41.7%1,696
2026-08-07610K1.2M50.8%4,846
2026-08-06608K1.3M45.2%7,477
2026-08-05799K1.6M49.8%506
2026-08-041.4M2.5M57.2%10
2026-08-031.3M2.7M49.7%1,069
2026-07-311.6M2.9M53.1%796

Fails to deliver

SEC, by settlement date. JSON

As of 12 August 2026, the fails-to-deliver balance in AMKR is 7,163 shares, up 7,134 shares over the last settlement date. Over the last 52 readings it ranged from 5 shares (13 February 2026) to 160,338 shares (12 June 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-127,163$54.30$389K
2026-08-0429$50.84$1K
2026-07-31459$48.26$22K
2026-07-3046,100$42.73$2.0M
2026-07-29398$45.69$18K
2026-07-271,704$64.96$111K
2026-07-223,326$66.73$222K
2026-07-17140$63.02$9K
2026-07-10100$72.16$7K
2026-07-0922,649$66.91$1.5M
2026-07-0616,455$69.65$1.1M
2026-07-021,572$79.99$126K
2026-06-224,800$90.46$434K
2026-06-16949$85.44$81K
2026-06-12160,338$76.15$12.2M
2026-06-1042$70.91$3K
2026-04-204,637$67.37$312K
2026-04-131,900$57.96$110K
2026-04-011,045$45.03$47K
2026-03-164,624$42.99$199K
2026-03-094,626$41.61$192K
2026-02-2310,453$47.94$501K
2026-02-1912,322$46.74$576K
2026-02-174,964$47.48$236K
2026-02-135$51.59$258
2026-02-109$52.52$473
2026-01-2610,779$49.71$536K
2026-01-22123$53.46$7K
2026-01-202,419$48.00$116K
2026-01-12100$52.29$5K

Insider trades

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

Insiders at AMKR reported 10 open-market sells worth $4.4M 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: Faust Megan (CFO) on 2026-09-08.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-08Faust MeganCFOSell1K$49.05$49K134K
2026-08-17ROGERS MARK NEVP &amp; General CounselSell5K$59.78$299K39K
2026-08-17ROGERS MARK NEVP &amp; General CounselOption exercise5K$7.40$37K44K
2026-08-11Faust MeganCFOSell1K$54.45$54K135K
2026-08-07ALEXANDER DOUGLAS An/aSell5K$55.81$279K29K
2026-08-07ALEXANDER DOUGLAS An/aOption exercise5K$8.51$43K34K
2026-08-06Rutten Guillaume Marie Jeann/aSell25K$54.50$1.4M462K
2026-08-05Rutten Guillaume Marie Jeann/aSell25K$55.35$1.4M487K
2026-07-30CHURCHILL WINSTON Jn/aGift100$0.00$029K
2026-07-30Engel Kevin K.President and CEOSell3K$47.00$151K10K
2026-07-20KIM AGNES Cn/aOption exercise250K$9.48$2.4M11.2M
2026-07-20KIM AGNES Cn/aOption exercise200K$9.86$2.0M10.9M
2026-07-20KIM JAMES Jn/aOption exercise250K$9.48$2.4M512K
2026-07-20KIM JAMES Jn/aOption exercise200K$9.86$2.0M262K
2026-07-16ROGERS MARK NEVP &amp; General CounselSell5K$65.12$326K39K
2026-07-16ROGERS MARK NEVP &amp; General CounselOption exercise5K$7.40$37K44K
2026-07-14Faust MeganCFOSell1K$69.91$70K136K
2026-06-30Engel Kevin K.President and CEOTax withholding4K$86.23$321K13K
2026-06-30Engel Kevin K.President and CEOOption exercise9K$0.00$017K
2026-06-30Faust MeganCFOTax withholding4K$86.23$321K137K
2026-06-30Faust MeganCFOOption exercise9K$0.00$0141K
2026-06-30Rutten Guillaume Marie Jeann/aOption exercise9K$0.00$0512K
2026-06-16ROGERS MARK NEVP &amp; General CounselSell5K$86.21$431K39K
2026-06-16ROGERS MARK NEVP &amp; General CounselOption exercise5K$7.40$37K44K
2026-06-12CHURCHILL WINSTON Jn/aSell5K$78.20$391K29K
2026-06-12CHURCHILL WINSTON Jn/aOption exercise5K$19.39$97K34K
2026-06-12KIM SUSAN Yn/aGrant10K$0.00$06.1M
2026-06-09Faust MeganCFOSell1K$70.30$70K132K
2026-05-19Faust MeganCFOSell1K$64.60$65K133K
2026-05-18ROGERS MARK NEVP &amp; General CounselSell5K$71.63$358K39K
2026-05-18ROGERS MARK NEVP &amp; General CounselOption exercise5K$7.40$37K44K
2026-05-13McCourt MaryFrancesn/aOption exercise10K$0.00$066K
2026-05-13CHURCHILL WINSTON Jn/aOption exercise10K$0.00$029K
2026-05-13Rutten Guillaume Marie Jeann/aOption exercise482$0.00$0503K
2026-05-13Tily Gil C.n/aOption exercise10K$0.00$0119K
2026-05-13WATSON DAVID Nn/aOption exercise10K$0.00$0131K
2026-05-11Tily Gil C.n/aSell15K$77.30$1.2M109K
2026-05-08Rutten Guillaume Marie Jeann/aSell50K$74.28$3.7M503K
2026-05-05Carolin Roger Anthonyn/aSell20K$76.24$1.5M94K
2026-05-05Carolin Roger Anthonyn/aOption exercise20K$11.71$234K114K
2026-05-05CHURCHILL WINSTON Jn/aSell7K$76.45$535K19K
2026-05-05ALEXANDER DOUGLAS An/aSell343$76.58$26K29K
2026-05-05ALEXANDER DOUGLAS An/aOption exercise343$8.51$3K29K
2026-05-05ALEXANDER DOUGLAS An/aSell5K$76.58$357K29K
2026-05-05ALEXANDER DOUGLAS An/aOption exercise5K$9.45$44K34K
2026-04-16ROGERS MARK NEVP &amp; General CounselSell5K$59.43$297K39K
2026-04-16ROGERS MARK NEVP &amp; General CounselOption exercise5K$7.40$37K44K
2026-04-07KIM SUSAN Yn/aOption exercise20K$5.66$113K6.1M
2026-04-07Morse Robert Randolphn/aTax withholding2K$0.00$0135K
2026-04-07Morse Robert Randolphn/aOption exercise20K$5.66$113K137K

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

9 Form 144 notices on file for AMKR worth $4.0M at the prices reported; 9 in the last 90 days worth $4.0M. Latest: MEGAN FAUST filed on 2026-09-08 to sell 1,000 shares ($49K) from 2026-09-08.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-08MEGAN FAUSTOfficer1K$49K0.000%2026-09-08Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-17MARK N ROGERSOfficer5K$299K0.002%2026-08-17Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11MEGAN FAUSTOfficer1K$54K0.000%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-07DOUGLAS A ALEXANDERDirector5K$279K0.002%2026-08-07Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-06GUILLAUME RUTTENDirector25K$1.4M0.010%2026-08-06Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-05GUILLAUME RUTTENDirector25K$1.4M0.010%2026-08-05Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-30KEVIN K ENGELOfficer, Director3K$151K0.001%2026-07-30Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-16MARK N ROGERSOfficer5K$326K0.002%2026-07-16Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-14MEGAN FAUSTOfficer1K$70K0.000%2026-07-14Morgan Stanley Smith Barney LLC Executive Financial Services

13F holders

Tracked managers holding AMKR at their latest 13F. JSON

9 of the 30 tracked managers held AMKR at their latest 13F, $1.09B in total at quarter-end prices. AQR Capital Management is the largest at $273.8M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 6 cut.

FundQuarterSharesValueOf portfolioChange in shares
AQR Capital Management2026-06-303.2M$273.8M0.10%-11K
Point72 Asset Management2026-06-302.6M$221.2M0.24%-571K
Citadel Advisors2026-06-302.0M$175.2M0.02%+1.2M
Fisher Asset Management2026-06-301.8M$157.1M0.05%-189K
Two Sigma Investments2026-06-301.1M$94.4M0.07%-146K
D. E. Shaw & Co.2026-06-30705K$60.8M0.03%-784K
Millennium Management2026-06-30641K$55.3M0.02%+549K
Renaissance Technologies2026-06-30581K$50.1M0.07%+238K
Bridgewater Associates2026-06-307K$616K0.00%-1.6M

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 Q1 2026 (quarter ended 2026-03-31) AMKOR TECHNOLOGY, INC. reported revenue of $1.68B, up 27.5% from the same quarter a year earlier, and net income of $83.4M (0.33 diluted EPS). In FY 2025 it generated $1.10B of operating cash flow and spent $81.9M on dividends. As of 2026-03-31, cash was $1.12B against $1.41B of debt.

Cash
$1.12B
Debt
$1.41B
Equity
$4.53B
Total assets
$8.30B
Shares outstanding
247,872,518

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q1 20262026-03-31$1.68B$83.4M4.9%0.33
Q4 2025derived2025-12-31$1.89B$171.8M9.1%n/a
Q3 20252025-09-30$1.99B$126.6M6.4%0.51
Q2 20252025-06-30$1.51B$54.4M3.6%0.22
Q1 20252025-03-31$1.32B$21.1M1.6%0.09
Q4 2024derived2024-12-31$1.63B$105.6M6.5%n/a
Q3 20242024-09-30$1.86B$122.6M6.6%0.49
Q2 20242024-06-30$1.46B$66.9M4.6%0.27

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$6.71B$373.9M$1.10B$904.6Mn/a$81.9M
FY 20242024-12-31$6.32B$354.0M$1.09B$743.8Mn/a$178.6M
FY 20232023-12-31$6.50B$359.8M$1.27B$749.5Mn/a$74.7M
FY 20222022-12-31$7.09B$765.8M$1.10B$908.3Mn/a$55.1M
FY 20212021-12-31$6.14B$643.0M$1.12B$779.8Mn/a$51.2M

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 2026-03-31; shares outstanding as of 2026-04-21 from the cover page.

What this page is

AMKOR TECHNOLOGY, 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 AMKOR TECHNOLOGY, INC. (AMKR), SEC CIK 1047127, 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 2026-08-12.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-08.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 2026-03-31.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-08.JSON and CSV
Company record
EDGAR filing index for CIK 1047127Ticker, 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 AMKR is sold short?
9,634,298 shares were held short at the 2026-08-14 settlement, 2.6 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 AMKR's daily short volume?
On 2026-09-11, 733,391 of the 1,159,749 AMKR shares reported to FINRA were sold short, 63.2% of the day's reported volume. Short volume is a flow for one day, not a position.
Does AMKR have fails to deliver?
The SEC's latest file shows 7,163 AMKR shares failed to deliver at settlement 2026-08-12. Fails are reported per settlement date and published twice a month with a lag.
Are AMKR insiders buying or selling?
Insiders at AMKR reported 10 open-market sells worth $4.4M 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: Faust Megan (CFO) on 2026-09-08.
Have AMKR insiders filed to sell?
9 Form 144 notices on file for AMKR worth $4.0M at the prices reported; 9 in the last 90 days worth $4.0M. Latest: MEGAN FAUST filed on 2026-09-08 to sell 1,000 shares ($49K) from 2026-09-08.
What did AMKR report last quarter?
In Q1 2026 (quarter ended 2026-03-31) AMKOR TECHNOLOGY, INC. reported revenue of $1.68B, up 27.5% from the same quarter a year earlier, and net income of $83.4M (0.33 diluted EPS). In FY 2025 it generated $1.10B of operating cash flow and spent $81.9M on dividends. As of 2026-03-31, cash was $1.12B against $1.41B of debt.
Which funds hold AMKR?
9 of the 30 tracked managers held AMKR at their latest 13F, $1.09B in total at quarter-end prices. AQR Capital Management is the largest at $273.8M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 6 cut.

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