Lhoist Seller Takes 15.4% Stake in Martin Marietta With Board Seat and 24-Month Lock-Up
MLM is trading near its 52-week low of $522.19 (2.1% above the low).
Summary
Lhoist's seller LNA Holding SRL disclosed a 15.4% stake in Martin Marietta (10.95M shares) received as acquisition consideration, with a two-year staggered lock-up, board designation rights, and a standstill cap.
Key Events · Ownership and Investor Activity · MLM
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15.4% Stake Received as Deal Consideration
LNA Holding SRL received 10,953,543 newly issued shares (15.4% of 71,020,331 outstanding) as part of the $13.5B Lhoist North America acquisition, alongside $7B in cash.
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Two-Year Staggered Lock-Up
50% of the Consideration Shares are released from lock-up on the 12-month anniversary of the August 21, 2026 closing, with the remaining 50% released at 24 months.
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Board Seat and Observer Rights
LNH may designate one director and one non-voting observer while owning at least 7,102,033 shares; the observer right drops between 5,326,525 and 7,102,033 shares; all rights terminate below 5,326,525 shares.
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Standstill Cap at 12.78M Shares
LNH and affiliates are restricted from acquiring more than 12,783,660 shares, with the standstill effective until 15 months after board designation rights end or ownership falls below 5,326,525 shares.
Analysis · MLM · Energy & Transportation
LNA Holding SRL, the seller in Martin Marietta's $13.5B Lhoist North America acquisition, now holds 10.95M shares (15.4% of the company) as part of the deal consideration. The 13D reveals the governance terms that will shape Martin Marietta's boardroom for the next two years: a staggered lock-up releasing half the shares at 12 months and the rest at 24 months, a board seat plus observer rights tied to ownership thresholds, and a standstill capping the seller at 12.78M shares. These terms matter because they determine when a 15% overhang can hit the market and how much influence the former Lhoist owners will have over Martin Marietta's strategy.
How filings like this one have moved
In the 30 days to Aug 24, 2026, 29.4% of the 2796 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.03%. These are measured outcomes after filings of this importance, not a forecast for this one.
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At the time of this filing, MLM was trading at $533.11 on NYSE in the Energy & Transportation sector, with a market capitalization of approximately $32B. The 52-week trading range was $522.19 to $710.97. This filing was assessed with neutral market sentiment and an importance score of 7 out of 10.