Martin Marietta Materials, Inc.
MX ˙ BMV ˙ US5732841060
SecurityMX:MLM / Martin Marietta Materials, Inc.
InstitutionVirtus Investment Advisers, Inc.
Latest Disclosed Ownership2,923 shares
Latest Disclosed Value $ 1,720,712
Virtus Investment Advisers, Inc. ownership in MLM / Martin Marietta Materials, Inc.

On May 14, 2026 - Virtus Investment Advisers, Inc. filed a 13F-HR form disclosing ownership of 2,923 shares of Martin Marietta Materials, Inc. (MX:MLM) valued at $1,720,712 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 15, 2018 disclosing 0 shares of Martin Marietta Materials, Inc..

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)
2026-05-14 2026-03-31 13F MARTIN MARIETTA MATLS COM 573284106 2,923 2,923 1,721 0.4746
2018-05-15 2018-03-31 13F MARTIN MARIETTA MATLS COM 573284106 0 -20,533 -100.00 0 -100.00
2018-02-26 2017-12-31 13F/A-1 MARTIN MARIETTA MATLS COM 573284106 20,533 -1,394 -6.36 4,539 0.38 0.4941
2018-02-14 2017-12-31 13F MARTIN MARIETTA MATLS COM 573284106 53,008 31,081 4,546
2017-11-14 2017-09-30 13F MARTIN MARIETTA MATLS COM 573284106 21,927 -15 -0.07 4,522 -7.41 0.4746
2017-08-14 2017-06-30 13F MARTIN MARIETTA MATLS COM 573284106 21,942 -3,885 -15.04 4,884 -13.36 0.4771
2017-05-15 2017-03-31 13F MARTIN MARIETTA MATLS COM 573284106 25,827 -4,134 -13.80 5,637 -15.07 0.4984
2017-02-14 2016-12-31 13F MARTIN MARIETTA MATLS COM 573284106 29,961 -14,459 -32.55 6,637 -16.58 0.5126
2016-11-14 2016-09-30 13F MARTIN MARIETTA MATLS COM 573284106 44,420 44,420 7,956 0.5086
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.