Martin Marietta Materials
MLM
950 hedge funds and large institutions have $28.5B invested in Martin Marietta Materials in 2025 Q1 according to their latest regulatory filings, with 108 funds opening new positions, 355 increasing their positions, 323 reducing their positions, and 136 closing their positions.
23% more call options, than puts
Call options by funds: $73.4M | Put options by funds: $59.7M
1.11% more ownership
Funds ownership: 96.72% → 97.83% (+1.1%)
10% more repeat investments, than reductions
Existing positions increased: 355 | Existing positions reduced: 323
4% less funds holding
Funds holding: 990 → 950 (-40)
7% less capital invested
Capital invested by funds: $30.5B → $28.5B (-$2.08B)
18% less funds holding in top 10
Funds holding in top 10: 17 → 14 (-3)
21% less first-time investments, than exits
New positions opened: 108 | Existing positions closed: 136
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
American Century Companies
Kansas City,
Missouri
|
+$178M |
| 2 |
Eagle Capital Management (New York)
New York
|
+$169M |
| 3 |
JP Morgan Chase
New York
|
+$137M |
| 4 |
CIBC Private Wealth Group
Atlanta,
Georgia
|
+$110M |
| 5 |
Diamond Hill Capital Management
Columbus,
Ohio
|
+$94.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Baillie Gifford & Co
Edinburgh,
United Kingdom
|
-$333M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$284M |
| 3 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$199M |
| 4 |
Select Equity Group
New York
|
-$110M |
| 5 |
William Blair Investment Management
Chicago,
Illinois
|
-$73.9M |
MLM Hedge Fund Activity: Q1 2025 in Review
950 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Martin Marietta Materials (MLM) for Q1 2025, worth a combined $28.5B — down 6.8% from $30.5B a quarter earlier.
Sellers outnumbered buyers: 136 funds closed out of MLM and 108 opened new positions — a net loss of 28 holders — while 323 trimmed existing stakes and 355 added.
The largest buyer was American Century Companies, adding an estimated $178M. The largest seller was Baillie Gifford & Co, cutting an estimated $333M.
- 950 institutional investors held Martin Marietta Materials (MLM) as of Q1 2025, down from 990 in Q4 2024.
- Funds reported $28.5B of Martin Marietta Materials stock for Q1 2025, down 6.8% quarter-over-quarter.
- 108 funds opened new Martin Marietta Materials positions in Q1 2025 and 136 closed out, a net change of -28 holders.
- The largest Martin Marietta Materials buyer in Q1 2025 was American Century Companies, an estimated $178M added.
- The largest Martin Marietta Materials seller in Q1 2025 was Baillie Gifford & Co, an estimated $333M sold.
Based on aggregated 13F filings for Q1 2025.