Martin Marietta Materials, Inc.
DE ˙ DB ˙ US5732841060
499,80 € ↑4,40 (0,89%)
2026-06-04
DEL PRIS
SecurityDE:MMX / Martin Marietta Materials, Inc.
InstitutionGAM Holding AG
Latest Disclosed Ownership1,156 shares
Latest Disclosed Value $ 719,795
GAM Holding AG reports 17.72% decrease in ownership of MMX / Martin Marietta Materials, Inc.

On February 17, 2026 - GAM Holding AG filed a 13F-HR form disclosing ownership of 1,156 shares of Martin Marietta Materials, Inc. (DE:MMX) valued at $624,240 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 21, 2025 disclosing 1,405 shares of Martin Marietta Materials, Inc.. This represents a change in shares of -17.72% during the quarter. The current value of the position is $577,769 USD.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-02-17 2025-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,156 -249 -17.72 720 -18.76 0.0349
2025-10-21 2025-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,405 0 0.00 886 14.79 0.0547
2025-08-04 2025-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,405 -71 -4.81 771 9.36 0.0542
2025-04-22 2025-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,476 1,476 706 0.0547
2020-02-06 2019-12-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -1,723 -100.00 0 -100.00
2019-11-08 2019-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,723 -247 -12.54 472 4.19 0.0208
2019-08-12 2019-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,970 1,970 453 0.0177
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 0 -16,209 -100.00 0 -100.00
2017-08-07 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 16,209 0 0.00 3,608 1.98 0.0532
2017-05-12 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 16,209 -1,989 -10.93 3,538 -12.23 0.0559
2017-02-10 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 18,198 16,634 1,063.55 4,031 1,339.64 0.0707
2016-11-07 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 280 -6.67 0.0049
2016-08-11 2016-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 300 20.48 0.0047
2016-05-13 2016-03-31 13F MARTIN MARIETTA MATLS COM 573284106 1,564 0 0.00 249 16.36 0.0041
2016-02-08 2015-12-31 13F MARTIN MARIETTA MATLS COM 573284106 1,564 120 8.31 214 -2.28 0.0033
2015-11-12 2015-09-30 13F MARTIN MARIETTA MATLS COM 573284106 1,444 48 3.44 219 10.61 0.0038
2015-07-27 2015-06-30 13F MARTIN MARIETTA MATLS COM 573284106 1,396 -22,491 -94.16 198 -94.07 0.0029
2015-05-12 2015-03-31 13F MARTIN MARIETTA MATLS COM 573284106 23,887 -10,941 -31.41 3,339 -13.11 0.0500
2015-02-06 2014-12-31 13F MARTIN MARIETTA MATLS COM 573284106 34,828 33,928 3,769.78 3,843 3,212.93 0.0574
2014-11-12 2014-09-30 13F MARTIN MARIETTA MATLS COM 573284106 900 0 0.00 116 -2.52 0.0017
2014-08-11 2014-06-30 13F MARTIN MARIETTA MATLS COM 573284106 900 0 0.00 119 2.59 0.0018
2014-05-15 2014-03-31 13F MARTIN MARIETTA MATLS COM 573284106 900 0 0.00 116 28.89 0.0019
2014-02-12 2013-12-31 13F MARTIN MARIETTA MATLS COM 573284106 900 0 0.00 90 2.27 0.0016
2013-11-12 2013-09-30 13F MARTIN MARIETTA MATLS COM 573284106 900 0 0.00 88 -1.12 0.0016
2013-08-13 2013-06-30 13F MARTIN MARIETTA MATERIALS COM 573284106 900 900 89 0.0019
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.