Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in IMOS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | RENAISSANCE TECHNOLOGIES LLC | 1.1M | $71.1M | -1.1% | 3.160% | 0.10% |
| 2 | BlackRock, Inc. | 255K | $16.4M | +0.4% | 0.730% | 0.00% |
| 3 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 172K | $11.1M | +116.3% | 0.493% | 0.05% |
| 4 | XY Capital Ltd | 130K | $8.4M | — | 0.372% | 8.08% |
| 5 | DIMENSIONAL FUND ADVISORS LP | 89K | $5.7M | -3.9% | 0.253% | 0.00% |
| 6 | Vanguard Personalized Indexing Management, LLC | 72K | $4.7M | +5.5% | 0.207% | 0.04% |
| 7 | JANE STREET GROUP, LLC | 70K | $4.5M | +669.8% | 0.200% | 0.00% |
| 8 | PEAK6 LLC | 62K | $4.0M | — | 0.176% | 0.01% |
| 9 | ENVESTNET ASSET MANAGEMENT INC | 53K | $3.4M | -2.9% | 0.152% | 0.00% |
| 10 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 53K | $3.4M | +14.6% | 0.151% | 0.00% |
| 11 | TWO SIGMA INVESTMENTS, LP | 51K | $3.3M | +68.1% | 0.145% | 0.00% |
| 12 | Creative Planning | 49K | $3.2M | +10.2% | 0.141% | 0.00% |
| 13 | MARSHALL WACE, LLP | 34K | $2.2M | +5.6% | 0.098% | 0.00% |
| 14 | RENAISSANCE GROUP LLC | 34K | $2.2M | -3.0% | 0.097% | 0.09% |
| 15 | Qube Research & Technologies Ltd | 33K | $2.1M | — | 0.093% | 0.00% |
| 16 | Caprock Group, LLC | 31K | $2.0M | +88.5% | 0.088% | 0.04% |
| 17 | CITADEL ADVISORS LLC | 30K | $1.9M | +21.3% | 0.086% | 0.00% |
| 18 | Ballentine Partners, LLC | 27K | $1.7M | +17.4% | 0.077% | 0.02% |
| 19 | RHUMBLINE ADVISERS | 26K | $1.7M | +5.4% | 0.073% | 0.00% |
| 20 | SIGNATUREFD, LLC | 21K | $1.3M | -0.9% | 0.059% | 0.02% |
| 21 | JPMORGAN CHASE & CO | 22K | $1.3M | +27258.7% | 0.063% | 0.00% |
| 22 | XTX Topco Ltd | 20K | $1.3M | +128.2% | 0.056% | 0.02% |
| 23 | LVW Advisors, LLC | 19K | $1.2M | +99.2% | 0.054% | 0.10% |
| 24 | Trexquant Investment LP | 16K | $1.1M | +120.2% | 0.047% | 0.01% |
| 25 | Kathmere Capital Management, LLC | 13K | $861K | +135.4% | 0.038% | 0.05% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in IMOS — a direct measure of their conviction.
Filings activity in IMOS during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 91 | +23% | 8.21% | +1.42 pp | $171M | +123% |
| Q1 2026 | 74 | +25% | 6.79% | +0.65 pp | $77M | +37% |
| Q4 2025 | 59 | +16% | 6.14% | 0.15 pp | $56M | +52% |
| Q3 2025 | 51 | +0.0% | 6.29% | 0.01 pp | $37M | +5.4% |
| Q2 2025 | 51 | +6.3% | 6.30% | +0.06 pp | $35M | +7.0% |
| Q1 2025 | 48 | 11% | 6.24% | 0.20 pp | $33M | 14% |
| Q4 2024 | 54 | 5.3% | 6.44% | 0.35 pp | $38M | 25% |
| Q3 2024 | 57 | — | 6.79% | — | $51M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying IMOS stock.
Based on Q2 2026 13F filings, institutional ownership of ChipMOS TECHNOLOGIES Inc. stands at 8.2%, held across 91 reporting institutions.
RENAISSANCE TECHNOLOGIES LLC is the largest reported institutional holder of IMOS, with approximately 1,105,890 shares worth $0.07B as of Q2 2026.
Yes — 5 widely-followed marquee investors appear among the top 25 institutional holders of IMOS, including RENAISSANCE TECHNOLOGIES LLC, JANE STREET GROUP, LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for IMOS is 84 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
26 institutions opened new positions in IMOS during Q2 2026, while 9 fully exited. 58 added to existing positions and 4 trimmed.
IMOS institutional ownership rose by 1.42 percentage points quarter-over-quarter, with a net change of +17 holders.
The top 10 institutions account for 77.6% of all reported 13F value in IMOS, and the top 25 account for 93.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
ChipMOS TECHNOLOGIES Inc. (IMOS) Institutional Ownership