Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ECX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 5.1M | $5.0M | 0.0% | 1.513% | 0.00% |
| 2 | TUDOR INVESTMENT CORP ET AL | 2.2M | $2.1M | +2.9% | 0.655% | 0.01% |
| 3 | RENAISSANCE TECHNOLOGIES LLC | 2.0M | $2.0M | +9.4% | 0.602% | 0.00% |
| 4 | STATE STREET CORP | 1.2M | $1.2M | -1.2% | 0.369% | 0.00% |
| 5 | Legal & General Group Plc | 1.1M | $1.1M | 0.0% | 0.325% | 0.00% |
| 6 | MARSHALL WACE, LLP | 758K | $743K | +205.9% | 0.226% | 0.00% |
| 7 | UBS Group AG | 682K | $667K | -3.5% | 0.204% | 0.00% |
| 8 | JANE STREET GROUP, LLC | 628K | $615K | -72.8% | 0.188% | 0.01% |
| 9 | Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 591K | $578K | -4.6% | 0.176% | 0.00% |
| 10 | BARCLAYS PLC | 338K | $331K | -4.6% | 0.101% | 0.00% |
| 11 | Invesco Ltd. | 222K | $217K | -6.7% | 0.066% | 0.00% |
| 12 | XTX Topco Ltd | 215K | $210K | +524.5% | 0.064% | 0.00% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 208K | $204K | 0.0% | 0.062% | 0.00% |
| 14 | BlackRock, Inc. | 194K | $189K | +30.5% | 0.058% | 0.00% |
| 15 | Susquehanna Portfolio Strategies, LLC | 142K | $139K | -17.6% | 0.042% | 0.00% |
| 16 | Centiva Capital, LP | 114K | $112K | β | 0.034% | 0.00% |
| 17 | Themes Management Co LLC | 103K | $100K | +44.9% | 0.031% | 0.06% |
| 18 | Concentric Capital Strategies, LP | 78K | $76K | β | 0.023% | 0.01% |
| 19 | MILLENNIUM MANAGEMENT LLC | 72K | $71K | +157.2% | 0.022% | 0.00% |
| 20 | HSBC HOLDINGS PLC | 63K | $60K | β | 0.019% | 0.00% |
| 21 | NORTHERN TRUST CORP | 56K | $55K | -1.2% | 0.017% | 0.00% |
| 22 | State of Wyoming | 52K | $51K | +621.4% | 0.015% | 0.01% |
| 23 | Quantbot Technologies LP | 51K | $49K | +15.8% | 0.015% | 0.00% |
| 24 | Green Alpha Advisors, LLC | 49K | $48K | -16.8% | 0.015% | 0.05% |
| 25 | Altshuler Shaham Ltd | 600K | $35K | 0.0% | 0.179% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ECX β a direct measure of their conviction.
Filings activity in ECX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ECX position in Q1 2026
Institutions that fully closed their ECX position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 39 | 2.5% | 3.82% | 4.31 pp | $16M | 53% |
| Q4 2025 | 40 | +14% | 8.13% | 1.06 pp | $34M | 11% |
| Q3 2025 | 35 | +21% | 9.19% | +2.96 pp | $38M | +48% |
| Q2 2025 | 29 | 37% | 6.23% | 2.00 pp | $26M | 24% |
| Q1 2025 | 46 | +77% | 8.23% | +3.68 pp | $34M | +81% |
| Q4 2024 | 26 | +86% | 4.55% | +0.74 pp | $19M | +19% |
| Q3 2024 | 14 | +7.7% | 3.81% | 0.24 pp | $16M | 6.0% |
| Q2 2024 | 13 | β | 4.05% | β | $17M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ECX stock.
Based on Q1 2026 13F filings, institutional ownership of ECARX Holdings, Inc. stands at 3.8%, held across 39 reporting institutions.
SUSQUEHANNA INTERNATIONAL GROUP, LLP is the largest reported institutional holder of ECX, with approximately 5,069,836 shares worth $0.00B as of Q1 2026.
Yes β 5 widely-followed marquee investors appear among the top 25 institutional holders of ECX, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, RENAISSANCE TECHNOLOGIES LLC, JANE STREET GROUP, LLC, Susquehanna Portfolio Strategies, LLC, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for ECX is 52 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
7 institutions opened new positions in ECX during Q1 2026, while 8 fully exited. 6 added to existing positions and 26 trimmed.
ECX institutional ownership fell by 4.31 percentage points quarter-over-quarter, with a net change of -1 holders.
The top 10 institutions account for 89.2% of all reported 13F value in ECX, and the top 25 account for 99.3%.
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.
ECARX Holdings, Inc. (ECX) Institutional Ownership