MLM Martin Marietta Materials, Inc.

NYSE
$528.21

Martin Marietta Materials, Inc. (MLM) 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
+60.00
4 buyers / 1 seller
STRONG BUYING
Funds compared
5
funds with comparable MLM positions
5 current holders · 4 prior-quarter holders
Net share change
+58.9K
+59.0K added, -100 cut
Position activity
1 new 3 increased 1 reduced 0 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
Squarepoint Ops LLC Quant Increased +47.7K +1668.5% $22.9M 0.1% 53
Y-Intercept Quant Increased +9.5K +729.1% $4.6M 0.1% 48
CenterBook Partners Long/Short Quant New +1.5K — $726.0K 0.0% 47
Wolverine Asset Management Event Quant Reduced -100 -10.0% $48.0K 0.0% 28
Edgestream Partners Quant Increased +258 +26.0% $123.8K 0.0% 25

Most significant buyers

By move score, not size.

  • Squarepoint Ops LLC Increased · +47.7K
  • Y-Intercept Increased · +9.5K
  • CenterBook Partners New · +1.5K
  • Edgestream Partners Increased · +258

Most significant sellers

By move score, not size.

  • Wolverine Asset Management Reduced · -100

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Squarepoint Ops LLC 2 50.5K 2.9K +47.7K +1668.5% 0.1% Increased 53
Y-Intercept 3 10.8K 1.3K +9.5K +729.1% 0.1% Increased 48
CenterBook Partners 4 1.5K 0 +1.5K — 0.0% New 47
Wolverine Asset Management 2 900 1.0K -100 -10.0% 0.0% Reduced 28
Edgestream Partners 3 1.2K 991 +258 +26.0% 0.0% Increased 25

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.