ChipMOS TECHNOLOGIES INC. (IMOS) Ownership
IMOS ownership summary
as of October 18, 2026- Institutions
- 8.0% of shares outstanding
- Insiders
- 0.00% of shares outstanding
- Shares outstanding
- 34.8M
- Float
- 27.8M shares available to trade
- Short interest
- 0.45% 121K shares short
- Days to cover
- 1.44 short interest up 33.3% vs prior month
- Institutions 8.04%
- Other investors 91.96%
IMOS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Renaissance Technologies Corp | 3.18% | 1.1M | $67.9M | −12,100 (−1.1%) | June 30, 2026 |
| 2 | BlackRock Inc | 0.73% | 255K | $15.7M | +1,138 (+0.4%) | June 30, 2026 |
| 3 | Acadian Asset Management LLC | 0.57% | 197K | $12.1M | −28,455 (−12.6%) | June 30, 2026 |
| 4 | O'Shaughnessy Asset Management LLC | 0.50% | 172K | $10.6M | +92,702 (+116.3%) | June 30, 2026 |
| 5 | XY Capital Ltd | 0.37% | 130K | $8.0M | +130,326 (0.0%) | June 30, 2026 |
| 6 | Dimensional Fund Advisors, Inc. | 0.26% | 89K | $5.4M | −3,569 (−3.9%) | June 30, 2026 |
| 7 | JustInvest LLC | 0.21% | 72K | $4.5M | +3,754 (+5.5%) | June 30, 2026 |
| 8 | Jane Street Group LLC | 0.15% | 53K | $3.2M | +43,740 (+480.0%) | June 30, 2026 |
| 9 | Two Sigma Investments LLC | 0.15% | 51K | $3.1M | +20,589 (+68.1%) | June 30, 2026 |
| 10 | Creative Planning Inc | 0.14% | 49K | $3.0M | +4,549 (+10.1%) | June 30, 2026 |
| 11 | Renaissance Group LLC | 0.10% | 35K | $2.2M | −1,064 (−2.9%) | March 31, 2026 |
| 12 | Marshall Wace Asset Management Ltd | 0.10% | 34K | $2.1M | +1,820 (+5.6%) | June 30, 2026 |
| 13 | Qube Research & Technologies | 0.09% | 33K | $2.0M | +32,641 (0.0%) | June 30, 2026 |
| 14 | Caprock Group Inc | 0.09% | 31K | $1.9M | +14,512 (+88.5%) | June 30, 2026 |
| 15 | Ballentine Finn & Company Inc | 0.08% | 27K | $1.6M | +3,971 (+17.4%) | June 30, 2026 |
| 16 | Rhumbline Advisers | 0.07% | 26K | $1.6M | +1,314 (+5.4%) | June 30, 2026 |
| 17 | JPMorgan Chase & Co | 0.06% | 22K | $1.3M | +21,807 (+27,258.8%) | June 30, 2026 |
| 18 | Susquehanna International Group, LLP | 0.06% | 21K | $1.3M | +20,814 (0.0%) | June 30, 2026 |
| 19 | SignatureFD, LLC | 0.06% | 21K | $1.3M | −186 (−0.9%) | June 30, 2026 |
| 20 | XTX Topco Ltd | 0.06% | 20K | $1.2M | +11,107 (+128.2%) | 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 405K shares and 5 cut 45K.
IMOS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | DFA Emerging Markets Core Equity 2 I | 0.17% | 61K | $3.7M | — | August 31, 2026 |
| 2 | LUX IM - Global Emerging Equities HX | 0.06% | 19K | $1.2M | −27,611 (−59.1%) | September 30, 2026 |
| 3 | DFA Emerging Markets Value I | 0.03% | 11K | $703,628 | — | August 31, 2026 |
| 4 | Sun Life Acadian International Eq I | 0.02% | 8,559 | $525,694 | −2,734 (−24.2%) | August 31, 2026 |
| 5 | SEI International Equity Class F | 0.02% | 6,688 | $410,777 | — | September 30, 2026 |
| 6 | Dimensional World ex US Core Eq 2 ETF | 0.02% | 6,661 | $409,119 | — | September 30, 2026 |
| 7 | ActivePassive International Equity ETF | 0.02% | 6,396 | $392,842 | — | September 30, 2026 |
| 8 | Harbor International Core Investor | 0.02% | 5,244 | $322,086 | −479 (−8.4%) | September 30, 2026 |
| 9 | Fidelity Nasdaq Composite Index | 0.01% | 3,698 | $227,131 | — | August 31, 2026 |
| 10 | Sun Life Global Mid Cap Fund I | 0.01% | 3,677 | $225,841 | — | July 31, 2026 |
| 11 | Dimensional Emerging Core Equity Mkt ETF | 0.01% | 2,781 | $170,809 | — | September 30, 2026 |
| 12 | Thrivent Core Emerging Markets Equity | 0.01% | 2,672 | $164,114 | — | August 31, 2026 |
| 13 | Invesco NASDAQ Future Gen 200 ETF | 0.01% | 2,194 | $134,755 | — | September 30, 2026 |
| 14 | DFA Emerging Markets Social Core Port | 0.01% | 2,049 | $125,850 | — | August 31, 2026 |
| 15 | Thrivent International Equity | 0.01% | 1,796 | $110,310 | — | August 31, 2026 |
| 16 | Thrivent International Equity S | <0.01% | 1,053 | $64,675 | — | August 31, 2026 |
| 17 | DFA International Core Equity Class F | <0.01% | 550 | $33,781 | — | July 31, 2026 |
| 18 | Dimensional EM Core Equity Acc | <0.01% | 499 | $30,649 | — | August 31, 2026 |
| 19 | Dimensional Emerg Mkt Trgtd Val USD Acc | <0.01% | 356 | $21,866 | — | August 31, 2026 |
| 20 | SA Emerging Markets Value | <0.01% | 328 | $20,146 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
IMOS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns IMOS
Institutional investors own 8.0% of ChipMOS TECHNOLOGIES INC.'s shares and insiders 0.00%. The largest holder is Renaissance Technologies Corp with 3.18% of the shares (1.1M), 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 0.45% of the float, or 1.44 days of average trading volume. The share count fell 4.3% since 2014.
Related: IMOS analyst forecast, IMOS key metrics, IMOS dividend history. See the IMOS stock overview for the latest quote and news.
IMOS ownership FAQ
Who owns the most ChipMOS TECHNOLOGIES INC. stock?
The largest shareholders of ChipMOS TECHNOLOGIES INC. are Renaissance Technologies Corp (3.18%), BlackRock Inc (0.73%), Acadian Asset Management LLC (0.57%), O'Shaughnessy Asset Management LLC (0.50%), XY Capital Ltd (0.37%).
What percentage of ChipMOS TECHNOLOGIES INC. is owned by institutions?
Institutions hold 8.0% of ChipMOS TECHNOLOGIES INC.'s shares outstanding; insiders hold 0.00%.
Which funds own ChipMOS TECHNOLOGIES INC.?
The largest fund holders of ChipMOS TECHNOLOGIES INC. are DFA Emerging Markets Core Equity 2 I (0.17%), LUX IM - Global Emerging Equities HX (0.06%), DFA Emerging Markets Value I (0.03%), Sun Life Acadian International Eq I (0.02%), SEI International Equity Class F (0.02%).
What is ChipMOS TECHNOLOGIES INC.'s short interest?
121K shares of ChipMOS TECHNOLOGIES INC. were sold short, 0.45% of the float; at the average daily volume it would take 1.44 days to cover.
How many shares of ChipMOS TECHNOLOGIES INC. are outstanding?
ChipMOS TECHNOLOGIES INC. has 34.8M shares outstanding, of which 27.8M are in the public float.