마틴 마리에타 머티리얼즈, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionFred Alger Management, Llc
Latest Disclosed Ownership52,273 shares
Latest Disclosed Value $ 30,772,070
Fred Alger Management, Llc reports 67.79% decrease in ownership of MLM / Martin Marietta Materials, Inc.

On May 15, 2026 - Fred Alger Management, Llc filed a 13F-HR form disclosing ownership of 52,273 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $30,772,070 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 162,310 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -67.79% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F Martin Marietta Materials Equity 573284106 52,273 -110,037 -67.79 30,772 -69.55 0.0860
2026-02-17 2025-12-31 13F Martin Marietta Materials Equity 573284106 162,310 -11,771 -6.76 101,064 -7.89 0.3964
2025-11-14 2025-09-30 13F Martin Marietta Materials Equity 573284106 174,081 -9,275 -5.06 109,720 9.01 0.4270
2025-08-14 2025-06-30 13F Martin Marietta Materials Equity 573284106 183,356 72,834 65.90 100,655 90.48 0.4505
2025-05-16 2025-03-31 13F Martin Marietta Materials Equity 573284106 110,522 21,241 23.79 52,844 14.59 0.3009
2025-02-14 2024-12-31 13F Martin Marietta Materials Equity 573284106 89,281 -55,458 -38.32 46,114 -40.81 0.2197
2024-11-14 2024-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 144,739 -59,241 -29.04 77,906 -29.51 0.3776
2024-08-14 2024-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 203,980 -128,463 -38.64 110,516 -45.85 0.5373
2024-05-15 2024-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 332,443 -62,356 -15.79 204,100 3.62 1.0121
2024-02-14 2023-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 394,799 -18,913 -4.57 196,969 15.99 1.0627
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 413,712 -122,139 -22.79 169,821 -31.36 0.9003
2023-11-14 2023-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 413,712 169,821
2023-08-14 2023-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 535,851 16,282 3.13 247,397 34.11 1.2637
2023-05-16 2023-03-31 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 519,569 519,569 184,478 0.9866
2023-05-15 2023-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 519,569 519,569 184,478 0.9148
2020-08-14 2020-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 0 -60 -100.00 0 -100.00
2020-05-19 2020-03-31 13F/A-1 MARTIN MARIETTA MATERIALS Common 573284106 60 -56 -48.28 11 -65.62 0.0000
2020-05-15 2020-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 60 -56 11 48.3973
2020-02-14 2019-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 116 60 107.14 32 113.33 0.0001
2019-11-14 2019-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 56 56 15 0.0001
2019-05-14 2019-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 0 -54,131 -100.00 0 -100.00
2019-02-14 2018-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 54,131 54,131 9,303 0.0428
2016-05-16 2016-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 0 -1,800 -100.00 0 -100.00
2016-02-16 2015-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 1,800 1,800 0.00 246 0.0012
2015-11-16 2015-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 0 -3,500 -100.00 0 -100.00
2015-08-14 2015-06-30 13F MARTIN MARIETTA MATERIALS Common 573284106 3,500 -211,483 -98.37 495 -98.35 0.0022
2015-05-15 2015-03-31 13F MARTIN MARIETTA MATERIALS Common 573284106 214,983 -188,290 -46.69 30,055 -32.44 0.1354
2015-02-17 2014-12-31 13F MARTIN MARIETTA MATERIALS Common 573284106 403,273 -901,055 -69.08 44,489 -73.55 0.2142
2014-11-14 2014-09-30 13F MARTIN MARIETTA MATERIALS Common 573284106 1,304,328 1,304,328 168,180 0.8179
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.