Ranked by reported Q1 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 | $40.0M | -0.6% | 3.189% | 0.06% |
| 2 | BlackRock, Inc. | 254K | $9.1M | +3.9% | 0.725% | 0.00% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 92K | $3.3M | +0.4% | 0.263% | 0.00% |
| 4 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 80K | $2.9M | — | 0.227% | 0.01% |
| 5 | JustInvest LLC | 69K | $2.5M | -6.4% | 0.196% | 0.02% |
| 6 | ENVESTNET ASSET MANAGEMENT INC | 55K | $2.0M | — | 0.156% | 0.00% |
| 7 | Creative Planning | 45K | $1.6M | +7.0% | 0.128% | 0.00% |
| 8 | RENAISSANCE GROUP LLC | 35K | $1.3M | -2.9% | 0.100% | 0.05% |
| 9 | MARSHALL WACE, LLP | 33K | $1.2M | — | 0.093% | 0.00% |
| 10 | TWO SIGMA INVESTMENTS, LP | 30K | $1.1M | — | 0.086% | 0.00% |
| 11 | CITADEL ADVISORS LLC | 25K | $890K | +52.8% | 0.071% | 0.00% |
| 12 | RHUMBLINE ADVISERS | 24K | $873K | +14.8% | 0.070% | 0.00% |
| 13 | Ballentine Partners, LLC | 23K | $819K | +6.3% | 0.065% | 0.01% |
| 14 | Parvin Asset Management, LLC | 22K | $779K | -2.1% | 0.062% | 0.57% |
| 15 | SIGNATUREFD, LLC | 21K | $748K | -1.6% | 0.060% | 0.01% |
| 16 | Quadrature Capital Ltd | 20K | $713K | — | 0.057% | 0.01% |
| 17 | CAPROCK Group, Inc. | 16K | $587K | — | 0.047% | 0.01% |
| 18 | LPL Financial LLC | 13K | $482K | +21.8% | 0.038% | 0.00% |
| 19 | BANK OF AMERICA CORP /DE/ | 13K | $462K | -5.7% | 0.037% | 0.00% |
| 20 | MILLENNIUM MANAGEMENT LLC | 11K | $384K | — | 0.031% | 0.00% |
| 21 | Connor, Clark & Lunn Investment Management Ltd. | 10K | $363K | +15.4% | 0.029% | 0.00% |
| 22 | LVW Advisors, LLC | 9K | $339K | — | 0.027% | 0.03% |
| 23 | JANE STREET GROUP, LLC | 9K | $326K | — | 0.026% | 0.00% |
| 24 | XTX Topco Ltd | 9K | $310K | — | 0.025% | 0.01% |
| 25 | Trexquant Investment LP | 7K | $267K | — | 0.021% | 0.00% |
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 Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new IMOS position in Q1 2026
Institutions that fully closed their IMOS position in Q1 2026
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 |
|---|---|---|---|---|---|---|
| Q1 2026 | 71 | +22% | 3.43% | +0.90 pp | $74M | +35% |
| Q4 2025 | 58 | +16% | 2.53% | +0.84 pp | $55M | +50% |
| Q3 2025 | 50 | 2.0% | 1.69% | +0.08 pp | $37M | +4.6% |
| Q2 2025 | 51 | +6.3% | 1.61% | +0.10 pp | $35M | +7.0% |
| Q1 2025 | 48 | 11% | 1.51% | 0.25 pp | $33M | 14% |
| Q4 2024 | 54 | 5.3% | 1.76% | 0.59 pp | $38M | 25% |
| Q3 2024 | 57 | 5.0% | 2.35% | 4.58 pp | $51M | 66% |
| Q2 2024 | 60 | — | 6.93% | — | $150M | — |
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 Q1 2026 13F filings, institutional ownership of ChipMOS TECHNOLOGIES Inc. stands at 3.4%, held across 71 reporting institutions.
RENAISSANCE TECHNOLOGIES LLC is the largest reported institutional holder of IMOS, with approximately 1,117,990 shares worth $0.04B as of Q1 2026.
Yes — 5 widely-followed marquee investors appear among the top 25 institutional holders of IMOS, including RENAISSANCE TECHNOLOGIES LLC, TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC, MILLENNIUM MANAGEMENT LLC, JANE STREET GROUP, LLC.
Our composite Smart Money Score for IMOS is 80 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
21 institutions opened new positions in IMOS during Q1 2026, while 8 fully exited. 45 added to existing positions and 5 trimmed.
IMOS institutional ownership rose by 0.90 percentage points quarter-over-quarter, with a net change of +13 holders.
The top 10 institutions account for 87.0% of all reported 13F value in IMOS, and the top 25 account for 98.2%.
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