Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MG held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Mill Road Capital Management LLC | 1.9M | $27.6M | +11.8% | 5.879% | 14.49% |
| 2 | DIMENSIONAL FUND ADVISORS LP | 1.7M | $25.2M | +2.1% | 5.355% | 0.01% |
| 3 | ROYCE & ASSOCIATES LP | 1.5M | $22.7M | +7.9% | 4.818% | 0.22% |
| 4 | WEBER CAPITAL MANAGEMENT LLC /ADV | 1.5M | $21.5M | -1.7% | 4.579% | 21.51% |
| 5 | IES Holdings, Inc. | 1.1M | $16.6M | +3.8% | 3.522% | 7.74% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 930K | $13.7M | — | 2.924% | 0.00% |
| 7 | BlackRock, Inc. | 859K | $12.7M | -2.4% | 2.701% | 0.00% |
| 8 | FEDERATED HERMES, INC. | 656K | $9.7M | 0.0% | 2.062% | 0.02% |
| 9 | Clearline Capital LP | 554K | $8.2M | -20.7% | 1.742% | 0.64% |
| 10 | Invenomic Capital Management LP | 453K | $6.7M | -4.9% | 1.423% | 0.31% |
| 11 | DEUTSCHE BANK AG\ | 379K | $5.6M | 0.0% | 1.193% | 0.00% |
| 12 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 354K | $5.2M | -12.1% | 1.114% | 0.11% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 353K | $5.2M | -2.0% | 1.111% | 0.00% |
| 14 | STATE STREET CORP | 312K | $4.6M | -5.6% | 0.981% | 0.00% |
| 15 | Pacific Ridge Capital Partners, LLC | 285K | $4.2M | +0.5% | 0.897% | 0.91% |
| 16 | First Eagle Investment Management, LLC | 282K | $4.2M | +264.6% | 0.885% | 0.01% |
| 17 | ESSEX INVESTMENT MANAGEMENT CO LLC | 269K | $4.0M | — | 0.844% | 0.63% |
| 18 | TWO SIGMA INVESTMENTS, LP | 231K | $3.4M | +74.0% | 0.727% | 0.00% |
| 19 | Empowered Funds, LLC | 225K | $3.3M | +1.8% | 0.709% | 0.02% |
| 20 | Qube Research & Technologies Ltd | 218K | $3.2M | +33.1% | 0.685% | 0.00% |
| 21 | SEI INVESTMENTS CO | 205K | $3.0M | +249.4% | 0.644% | 0.00% |
| 22 | JB CAPITAL PARTNERS LP | 202K | $3.0M | 0.0% | 0.636% | 0.51% |
| 23 | NORTHERN TRUST CORP | 160K | $2.4M | -0.8% | 0.502% | 0.00% |
| 24 | CITADEL ADVISORS LLC | 155K | $2.3M | -41.2% | 0.488% | 0.00% |
| 25 | Knights of Columbus Asset Advisors LLC | 140K | $2.1M | — | 0.440% | 0.12% |
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 MG — a direct measure of their conviction.
Filings activity in MG 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 | 125 | +3.3% | 43.35% | +6.84 pp | $257M | +19% |
| Q4 2025 | 121 | +11% | 36.51% | +10.60 pp | $217M | +41% |
| Q3 2025 | 109 | +0.9% | 25.91% | +4.70 pp | $154M | +22% |
| Q2 2025 | 108 | +0.0% | 21.21% | 6.14 pp | $126M | 22% |
| Q1 2025 | 108 | +0.9% | 27.35% | +5.39 pp | $162M | +25% |
| Q4 2024 | 107 | +0.9% | 21.96% | 6.37 pp | $130M | 22% |
| Q3 2024 | 106 | +18% | 28.33% | +8.51 pp | $168M | +43% |
| Q2 2024 | 90 | — | 19.82% | — | $118M | — |
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 MG stock.
Based on Q1 2026 13F filings, institutional ownership of Mistras Group, Inc. stands at 43.4%, held across 125 reporting institutions.
Mill Road Capital Management LLC is the largest reported institutional holder of MG, with approximately 1,870,580 shares worth $0.03B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of MG, including TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for MG is 67 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
18 institutions opened new positions in MG during Q1 2026, while 14 fully exited. 79 added to existing positions and 28 trimmed.
MG institutional ownership rose by 6.84 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 64.0% of all reported 13F value in MG, and the top 25 account for 85.7%.
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.
Mistras Group, Inc. (MG) Institutional Ownership