Matrix Service Co
MTRX- Exchange
- Nasdaq
- Industry
- Construction - Special Trade Contractors
- SEC CIK
- 0000866273
No open-market purchases or sales by Matrix Service Co insiders were filed in the last 90 days; 150 institutions reported holding it in 13F filings for Q2 2026, worth $341.1M in total; no superinvestor holds it.
Holders of 5% or more of MTRX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Matrix Service Co, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 12.40%3.49M shares | +1.80 ppfrom 10.60% | Apr 17, 20252 filings | Jan 21, 2026 | SEC |
| Needham Investment Management LLC | 13G | 5.15%1.42M shares | New | Feb 13, 20251 filing | Feb 13, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
9 Schedule 13D and 13G filings on Matrix Service Co, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 202610:32 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Jan 21, 202612:30 PM ET | BlackRock, Inc. | 13G/A | 12.40%3.49M shares | +1.80 ppfrom 10.60% | Dec 31, 2025 | SEC |
| Aug 14, 20259:55 PM ET | Harvey Partners, LLC | 13G/A | 4.40%1.22M shares | –Below 5% | Jun 30, 2025 | SEC |
| Apr 17, 20259:35 AM ET | BlackRock, Inc. | 13G/A | 10.60%2.93M shares | – | Mar 31, 2025 | SEC |
| Apr 9, 202511:28 AM ET | Azarias Capital Management, L.P. | 13G/A | 4.40%1.22M shares | −0.80 ppfrom 5.20%Below 5% | Dec 31, 2024 | SEC |
| Apr 3, 20254:47 PM ET | Azarias Capital Management, L.P. | 13G/A | 5.20%1.44M shares | +0.10 ppfrom 5.10% | Sep 30, 2024 | SEC |
| Feb 13, 20257:16 PM ET | Needham Investment Management LLCand 3 others | 13G | 5.15%1.42M shares | New | Dec 31, 2024 | SEC |
| Feb 13, 20256:53 PM ET | First Wilshire Securities Management Inc | 13G/A | 4.90%1.35M shares | –Below 5% | Dec 31, 2024 | SEC |
| Nov 1, 20241:01 PM ET | Azarias Capital Management, L.P. | 13G | 5.10%27.5M shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Matrix Service Co shares.
No Form 144 notices for Matrix Service Co are on file.