MARCHEX INC-CLASS B (MCHX) Top Institutional Shareholders
MARCHEX INC-CLASS B (MCHX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $32.60M in MCHX holdings during the latest filing period.
Edenbrook Capital, Llc is currently the largest disclosed institutional shareholder of MCHX tracked by InsiderSet, reporting ownership valued at approximately $22.73M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $21.85M, representing an estimated loss of -3.87% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 98% of the total disclosed MCHX value among the investors covered in this analysis. Major shareholders include Edenbrook Capital, Llc, Renaissance Technologies LLC, Kanen Wealth Management Llc, and several other long-term asset managers with concentrated positions in MARCHEX INC-CLASS B (MCHX).
This page ranks the largest institutional MCHX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
27
Total Reported Value
$32.60M
Largest Holder
Edenbrook Capital, Llc
Largest Position
$22.73M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
32
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Edenbrook Capital, Llc | 11.62% | 14,664,380 | $22,729,789 | $21,849,926 | -$879,863 | -3.87% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 1,605,904 | $2,489,151 | $2,392,797 | -$96,354 | -3.87% |
| Kanen Wealth Management Llc | 0.72% | 1,300,388 | $2,015,601 | $1,937,578 | -$78,023 | -3.87% | |
| Vanguard Capital Management Llc | 0.00% | 1,081,336 | $1,676,071 | $1,611,191 | -$64,880 | -3.87% | |
| Blackrock, Inc. | 0.00% | 639,995 | $991,992 | $953,593 | -$38,399 | -3.87% | |
| Geode Capital Management, Llc | 0.00% | 404,806 | $627,600 | $603,161 | -$24,439 | -3.89% | |
| P.A.W. Capital Corp | 1.69% | 400,000 | $620,000 | $596,000 | -$24,000 | -3.87% | |
| Vanguard Fiduciary Trust Co | 0.00% | 202,178 | $313,376 | $301,245 | -$12,131 | -3.87% | |
| State Street Corp | 0.00% | 140,696 | $218,079 | $209,637 | -$8,442 | -3.87% | |
| Acuitas Investments, Llc | 14.70% | 133,702 | $207,238 | $199,216 | -$8,022 | -3.87% | |
| Northern Trust Corp | 0.00% | 76,029 | $117,845 | $113,283 | -$4,562 | -3.87% | |
| Dimensional Fund Advisors Lp | 0.00% | 66,276 | $102,742 | $98,751 | -$3,991 | -3.88% | |
| Marathon Capital Management | 0.02% | 61,500 | $95,325 | $91,635 | -$3,690 | -3.87% | |
| Bridgeway Capital Management, Llc | 0.00% | 56,828 | $88,083 | $84,674 | -$3,409 | -3.87% | |
| Goldman Sachs Group Inc | 0.00% | 47,428 | $73,513 | $70,668 | -$2,845 | -3.87% | |
| Morgan Stanley | 0.00% | 33,136 | $51,361 | $49,373 | -$1,988 | -3.87% | |
| Lpl Financial Llc | 0.00% | 31,190 | $48,345 | $46,473 | -$1,872 | -3.87% | |
| Charles Schwab Investment Management Inc | 0.00% | 24,313 | $37,685 | $36,226 | -$1,459 | -3.87% | |
| Black Diamond Financial, Llc | 0.00% | 20,000 | $31,000 | $29,800 | -$1,200 | -3.87% | |
| Citadel Advisors Llc | 0.00% | 16,629 | $25,775 | $24,777 | -$998 | -3.87% | |
| Vanguard Global Advisers, Llc | 0.00% | 11,241 | $17,424 | $16,749 | -$675 | -3.87% | |
| Independent Advisor Alliance | 0.00% | 10,000 | $15,500 | $14,900 | -$600 | -3.87% | |
| Tower Research Capital Llc (Trc) | 0.00% | 2,091 | $3,241 | $3,116 | -$125 | -3.87% | |
| Ubs Group Ag | 0.00% | 626 | $970 | $933 | -$37 | -3.84% | |
| Acadian Asset Management Llc | 0.00% | 211,619 | $327 | $315,312 | +$314,985 | +96325.78% | |
| Bnp Paribas Financial Markets | 0.00% | 2 | $3 | $3 | -$0 | -0.67% | |
| Wells Fargo & Company/Mn | 0.00% | 1 | $1 | $1 | +$0 | +49.00% |
Frequently asked questions about MCHX
Who owns the most MCHX stock?
The largest holders of MCHX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MARCHEX INC-CLASS B (MCHX).
Is MCHX widely held by superinvestors?
Many widely followed stocks like MCHX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MCHX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.