31 institutions reported holding $32.9M of MARCHEX INC (MCHX) in SEC 13F filings for 2026-03-31. Largest institutional holders: Edenbrook Capital, LLC ($22.7M), RENAISSANCE TECHNOLOGIES LLC ($2.5M), Kanen Wealth Management LLC ($2.0M), VANGUARD CAPITAL MANAGEMENT LLC ($1.7M), BlackRock, Inc. ($991,992). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Edenbrook Capital, LLC | $22.7M | 14.7M | Hold |
| 2 | RENAISSANCE TECHNOLOGIES LLC | $2.5M | 1.6M | Trimmed |
| 3 | Kanen Wealth Management LLC | $2.0M | 1.3M | Added |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $1.7M | 1.1M | New |
| 5 | BlackRock, Inc. | $991,992 | 639,995 | Added |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $627,600 | 404,806 | Added |
| 7 | P.A.W. CAPITAL CORP | $620,000 | 400,000 | Hold |
| 8 | ACADIAN ASSET MANAGEMENT LLC | $327,000 | 211,619 | Trimmed |
| 9 | VANGUARD FIDUCIARY TRUST CO | $313,376 | 202,178 | New |
| 10 | STATE STREET CORP | $218,079 | 140,696 | Added |
| 11 | Acuitas Investments, LLC | $207,238 | 133,702 | New |
| 12 | NORTHERN TRUST CORP | $117,845 | 76,029 | Hold |
| 13 | DIMENSIONAL FUND ADVISORS LP | $102,742 | 66,276 | Hold |
| 14 | MARATHON CAPITAL MANAGEMENT | $95,325 | 61,500 | Hold |
| 15 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $88,083 | 56,828 | Hold |
| 16 | GOLDMAN SACHS GROUP INC | $73,513 | 47,428 | Added |
| 17 | MORGAN STANLEY | $51,361 | 33,136 | Hold |
| 18 | LPL Financial LLC | $48,345 | 31,190 | Trimmed |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $37,685 | 24,313 | Hold |
| 20 | Black Diamond Financial, LLC | $31,000 | 20,000 | New |
| 21 | CITADEL ADVISORS LLC | $25,775 | 16,629 | Added |
| 22 | Vanguard Global Advisers, LLC | $17,424 | 11,241 | New |
| 23 | Independent Advisor Alliance | $15,500 | 10,000 | Hold |
| 24 | Tower Research Capital LLC (TRC) | $3,241 | 2,091 | Added |
| 25 | UBS Group AG | $970 | 626 | Added |
Source: SEC Form 13F filings · as of 2026-03-31