Amkor Technology, Inc. (AMKR) Ownership
AMKR ownership summary
as of October 18, 2026- Institutions
- 48.6% of shares outstanding
- Insiders
- 49.91% of shares outstanding
- Shares outstanding
- 248.5M
- Float
- 108.7M shares available to trade
- Short interest
- 17.32% 10.7M shares short
- Days to cover
- 2.73 short interest up 7.7% vs prior month
- Institutions 48.61%
- Insiders 49.91%
- Other investors 1.48%
AMKR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 4.95% | 12.3M | $514.1M | −676,005 (−5.2%) | June 30, 2026 |
| 2 | Vanguard Portfolio Management, LLC | 3.91% | 9.7M | $406.2M | +616,705 (+6.8%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 3.25% | 8.1M | $337.2M | −2.9M (−26.6%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 2.70% | 6.7M | $280.2M | +1.3M (+23.3%) | June 30, 2026 |
| 5 | JPMorgan Chase & Co | 2.30% | 5.7M | $238.5M | +296,063 (+5.5%) | June 30, 2026 |
| 6 | State Street Corp | 1.50% | 3.7M | $156.0M | +102,042 (+2.8%) | June 30, 2026 |
| 7 | AQR Capital Management LLC | 1.30% | 3.2M | $135.1M | −10,584 (−0.3%) | June 30, 2026 |
| 8 | Earnest Partners LLC | 1.15% | 2.9M | $119.3M | −579,351 (−16.9%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 1.13% | 2.8M | $117.0M | +67,641 (+2.5%) | June 30, 2026 |
| 10 | Amvescap Plc. | 1.00% | 2.5M | $104.0M | +596,389 (+31.6%) | June 30, 2026 |
| 11 | Point72 Asset Management, L.P. | 1.00% | 2.5M | $103.6M | −516,108 (−17.2%) | June 30, 2026 |
| 12 | Principal Financial Group Inc | 0.79% | 2.0M | $82.4M | −652,544 (−24.9%) | June 30, 2026 |
| 13 | First Trust Advisors L.P. | 0.74% | 1.8M | $76.8M | +42,769 (+2.4%) | June 30, 2026 |
| 14 | Charles Schwab Investment Management Inc | 0.74% | 1.8M | $76.6M | −269,003 (−12.8%) | June 30, 2026 |
| 15 | Fisher Asset Management, LLC | 0.73% | 1.8M | $76.2M | −189,435 (−9.4%) | June 30, 2026 |
| 16 | Clal Insurance Enterprises Holdings Ltd | 0.71% | 1.8M | $73.8M | +1.8M (0.0%) | June 30, 2026 |
| 17 | T. Rowe Price Associates, Inc. | 0.67% | 1.7M | $69.4M | +913,054 (+122.3%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.61% | 1.5M | $63.8M | +152,877 (+11.1%) | June 30, 2026 |
| 19 | NORGES BANK | 0.59% | 1.5M | $61.8M | +117,007 (+8.6%) | June 30, 2026 |
| 20 | Qube Research & Technologies | 0.47% | 1.2M | $48.6M | +799,341 (+220.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 6.7M shares and 8 cut 5.8M.
AMKR top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.06% | 5.1M | $214.3M | −5,803 (−0.1%) | August 31, 2026 |
| 2 | iShares Core S&P Mid-Cap ETF | 1.78% | 4.4M | $185.1M | −1,584 (−0.0%) | September 30, 2026 |
| 3 | Vanguard Small Cap Index | 1.35% | 3.4M | $140.3M | −353,699 (−9.5%) | September 30, 2026 |
| 4 | Vanguard MStar Small Cap Value Index | 0.88% | 2.2M | $91.3M | −171,748 (−7.3%) | September 30, 2026 |
| 5 | Vanguard Information Technology ETF | 0.81% | 2.0M | $83.8M | +4,613 (+0.2%) | September 30, 2026 |
| 6 | DFA US Targeted Value I | 0.62% | 1.5M | $64.2M | +39,234 (+2.6%) | August 31, 2026 |
| 7 | Invesco Semiconductors ETF | 0.58% | 1.4M | $60.3M | — | September 30, 2026 |
| 8 | Dimensional US Targeted Value ETF | 0.51% | 1.3M | $52.8M | +526 (+0.0%) | September 30, 2026 |
| 9 | BlackRock Mid-Cap Growth Equity Instl | 0.42% | 1.1M | $44.0M | −26,589 (−2.5%) | August 31, 2026 |
| 10 | First Trust Nasdaq Semiconductor ETF | 0.38% | 939K | $39.3M | — | September 30, 2026 |
| 11 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.37% | 919K | $38.4M | +84,663 (+10.2%) | September 30, 2026 |
| 12 | Harbor Small Cap Value Instl | 0.37% | 914K | $38.2M | −167,279 (−15.5%) | September 30, 2026 |
| 13 | Invesco S&P MidCap Momentum ETF | 0.30% | 752K | $31.4M | — | September 30, 2026 |
| 14 | DFA US Small Cap I | 0.29% | 717K | $30.0M | +109,063 (+18.0%) | August 31, 2026 |
| 15 | Dimensional US Small Cap Value ETF | 0.28% | 690K | $28.8M | — | September 24, 2026 |
| 16 | State Street SPDR Port S&P 400 Md CpETF | 0.26% | 657K | $27.5M | −920 (−0.1%) | September 30, 2026 |
| 17 | iShares Future AI & Tech ETF | 0.25% | 628K | $26.3M | — | September 30, 2026 |
| 18 | Dimensional US Small Cap ETF | 0.25% | 625K | $26.1M | — | September 30, 2026 |
| 19 | DFA US Core Equity 2 I | 0.24% | 601K | $25.2M | — | August 31, 2026 |
| 20 | FI Instl US Sm & Md-Cp Cor Eq USD | 0.23% | 573K | $23.9M | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AMKR insider transactions
latest 19| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-16 | Mark N Rogers | Sell | $59.43 | 5,000 | $297,150 |
| 2026-03-16 | Mark N Rogers | Sell | $44.54 | 5,000 | $222,700 |
| 2026-02-24 | Guillaume Marie Jean Rutten | Sell | $48.80 | 20,000 | $976,000 |
| 2026-02-24 | Kevin K Engel | Sell | $48.75 | 12,500 | $609,375 |
| 2026-02-04 | Markwayne Mullin | Buy | $43.87 | — | — |
| 2026-01-16 | Mark N Rogers | Sell | $49.28 | 5,000 | $246,400 |
| 2026-01-15 | Guillaume Marie Jean Rutten | Sell | $53.14 | 10,000 | $531,400 |
| 2026-01-05 | Markwayne Mullin | Buy | $48.13 | — | — |
| 2025-12-12 | Kevin Engel | Sell | $46.21 | 11,000 | $508,310 |
| 2025-12-12 | Maryfrances Mccourt | Sell | $46.02 | 20,000 | $920,400 |
| 2025-12-12 | Gil C Tily | Sell | $46.44 | 20,000 | $928,800 |
| 2025-11-17 | Guillaume Marie Jean Rutten | Sell | $31.68 | 10,000 | $316,800 |
| 2025-11-17 | Mark N Rogers | Sell | $31.69 | 20,000 | $633,800 |
| 2025-10-15 | Guillaume Marie Jean Rutten | Sell | $30.74 | 10,000 | $307,400 |
| 2025-09-23 | Guillaume Marie Jean Rutten | Sell | $30.00 | 10,000 | $300,000 |
| 2025-09-09 | Farshad Haghighi | Sell | $25.00 | 11,792 | $294,800 |
| 2025-08-01 | John T Kim | Buy | $21.85 | 441,589 | $9.6M |
| 2025-08-01 | Sujoda Management, Llc | Buy | $21.85 | 441,589 | $9.6M |
| 2025-07-31 | Mark N Rogers | Sell | $23.58 | 15,000 | $353,700 |
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.
AMKR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AMKR
Institutional investors own 48.6% of Amkor Technology's shares and insiders 49.91%. The largest holder is BlackRock Inc with 4.95% of the shares (12.3M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 8 reduced their stake in the latest filings. Short interest is 17.32% of the float, or 2.73 days of average trading volume. The share count rose 4.8% since 2014.
Related: AMKR analyst forecast, AMKR key metrics, AMKR dividend history. See the AMKR stock overview for the latest quote and news.
AMKR ownership FAQ
Who owns the most Amkor Technology stock?
The largest shareholders of Amkor Technology are BlackRock Inc (4.95%), Vanguard Portfolio Management, LLC (3.91%), Dimensional Fund Advisors, Inc. (3.25%), Vanguard Capital Management, LLC (2.70%), JPMorgan Chase & Co (2.30%).
What percentage of Amkor Technology is owned by institutions?
Institutions hold 48.6% of Amkor Technology's shares outstanding; insiders hold 49.91%.
Which funds own Amkor Technology?
The largest fund holders of Amkor Technology are Vanguard MStar Total Stk Mkt Idx Invest (2.06%), iShares Core S&P Mid-Cap ETF (1.78%), Vanguard Small Cap Index (1.35%), Vanguard MStar Small Cap Value Index (0.88%), Vanguard Information Technology ETF (0.81%).
What is Amkor Technology's short interest?
10.7M shares of Amkor Technology were sold short, 17.32% of the float; at the average daily volume it would take 2.73 days to cover.
Are insiders buying or selling Amkor Technology?
Of the latest 19 reported insider transactions in Amkor Technology (since July 31, 2025), 4 were purchases and 15 were sales.
How many shares of Amkor Technology are outstanding?
Amkor Technology has 248.5M shares outstanding, of which 108.7M are in the public float.