Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in CIX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | DIMENSIONAL FUND ADVISORS LP | 179K | $4.2M | -0.2% | 1.456% | 0.00% |
| 2 | ROYCE & ASSOCIATES LP | 166K | $3.9M | 0.0% | 1.348% | 0.04% |
| 3 | BlackRock, Inc. | 108K | $2.5M | +0.4% | 0.872% | 0.00% |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 107K | $2.5M | -5.8% | 0.868% | 0.00% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 78K | $1.8M | — | 0.635% | 0.00% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 35K | $808K | -6.8% | 0.281% | 0.00% |
| 7 | STATE STREET CORP | 31K | $715K | -0.3% | 0.248% | 0.00% |
| 8 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 24K | $553K | 0.0% | 0.192% | 0.01% |
| 9 | NORTHERN TRUST CORP | 17K | $397K | -2.7% | 0.138% | 0.00% |
| 10 | VANGUARD FIDUCIARY TRUST CO | 11K | $249K | — | 0.086% | 0.00% |
| 11 | VANGUARD PORTFOLIO MANAGEMENT LLC | 9K | $206K | — | 0.072% | 0.00% |
| 12 | BARCLAYS PLC | 6K | $139K | -25.9% | 0.048% | 0.00% |
| 13 | MORGAN STANLEY | 4K | $102K | -19.1% | 0.035% | 0.00% |
| 14 | RHUMBLINE ADVISERS | 3K | $61K | -1.5% | 0.021% | 0.00% |
| 15 | DEUTSCHE BANK AG\ | 1K | $33K | 0.0% | 0.012% | 0.00% |
| 16 | EverSource Wealth Advisors, LLC | 4K | $33K | +105475.0% | 0.034% | 0.00% |
| 17 | ROYAL BANK OF CANADA | 1K | $27K | +23.2% | 0.009% | 0.00% |
| 18 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 767 | $18K | +4.6% | 0.006% | 0.00% |
| 19 | FMR LLC | 742 | $17K | -3.4% | 0.006% | 0.00% |
| 20 | Tower Research Capital LLC (TRC) | 737 | $17K | +66.0% | 0.006% | 0.00% |
| 21 | WELLS FARGO & COMPANY/MN | 567 | $13K | -66.6% | 0.005% | 0.00% |
| 22 | BNP PARIBAS ARBITRAGE, SA | 342 | $8K | +4.0% | 0.003% | 0.00% |
| 23 | Russell Investments Group, Ltd. | 329 | $8K | -37.6% | 0.003% | 0.00% |
| 24 | MAI Capital Management | 302 | $7K | 0.0% | 0.003% | 0.00% |
| 25 | UBS Group AG | 279 | $7K | -13.9% | 0.002% | 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 CIX — a direct measure of their conviction.
Filings activity in CIX during Q1 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 |
|---|---|---|---|---|---|---|
| Q1 2026 | 40 | +2.6% | 5.78% | 0.14 pp | $18M | 2.4% |
| Q4 2025 | 39 | 9.3% | 5.92% | 0.57 pp | $19M | 8.8% |
| Q3 2025 | 43 | 2.3% | 6.49% | 1.22 pp | $21M | 16% |
| Q2 2025 | 44 | +4.8% | 7.71% | +1.75 pp | $24M | +29% |
| Q1 2025 | 42 | +2.4% | 5.96% | 1.73 pp | $19M | 22% |
| Q4 2024 | 41 | +0.0% | 7.69% | 0.32 pp | $24M | 4.1% |
| Q3 2024 | 41 | +14% | 8.01% | +1.19 pp | $25M | +18% |
| Q2 2024 | 36 | — | 6.82% | — | $22M | — |
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 CIX stock.
Based on Q1 2026 13F filings, institutional ownership of CompX International Inc. stands at 5.8%, held across 40 reporting institutions.
DIMENSIONAL FUND ADVISORS LP is the largest reported institutional holder of CIX, with approximately 179,409 shares worth $0.00B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of CIX, including RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for CIX is 50 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
6 institutions opened new positions in CIX during Q1 2026, while 5 fully exited. 17 added to existing positions and 14 trimmed.
CIX institutional ownership fell by 0.14 percentage points quarter-over-quarter, with a net change of +1 holders.
The top 10 institutions account for 96.1% of all reported 13F value in CIX, and the top 25 account for 99.9%.
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.
CompX International Inc. (CIX) Institutional Ownership