MKTX MarketAxess Holdings Inc.

NASDAQ
$165.08

MarketAxess Holdings Inc. (MKTX) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of September 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+20.00
3 buyers / 2 sellers
BUYING
Funds compared
5
funds with comparable MKTX positions
3 current holders · 3 prior-quarter holders
Net share change
+112.4K
+184.5K added, -72.1K cut
Position activity
2 new 1 increased 0 reduced 2 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Quinn Opportunity Partners Event New +140.0K — $22.9M 1.3% 59
Wolverine Asset Management Event Quant New +12.2K — $2.0M 0.1% 59
Y-Intercept Quant Sold Out -54.8K -100.0% $9.0M 0.0% 54
Squarepoint Ops LLC Quant Increased +32.2K +99.3% $5.3M 0.0% 50
CenterBook Partners Long/Short Quant Sold Out -17.3K -100.0% $2.8M 0.0% 50

Most significant buyers

By move score, not size.

  • Quinn Opportunity Partners New · +140.0K
  • Wolverine Asset Management New · +12.2K
  • Squarepoint Ops LLC Increased · +32.2K

Most significant sellers

By move score, not size.

  • Y-Intercept Sold Out · -54.8K
  • CenterBook Partners Sold Out · -17.3K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Quinn Opportunity Partners 4 140.0K 0 +140.0K — 1.3% New 59
Wolverine Asset Management 2 12.2K 0 +12.2K — 0.1% New 59
Y-Intercept 3 0 54.8K -54.8K -100.0% 0.0% Sold Out 54
Squarepoint Ops LLC 2 64.7K 32.5K +32.2K +99.3% 0.0% Increased 50
CenterBook Partners 4 0 17.3K -17.3K -100.0% 0.0% Sold Out 50

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.