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HomeStocksMLMInstitutional Holders

MLM logoMartin Marietta Materials, Inc. (MLM) Institutional Ownership

Q2 2026 13F Data|Updated 2026-11-07

✨

Institutional ownership increased this quarter (+1.61 pp), with a relatively well-distributed shareholder base.

Institutional Ownership
Can exceed 100% due to securities lending, short interest, and reporting timing differences.
99.0%$32.7B total value · ▲ +1.61 pp vs prior quarter
Smart Money Score
Based on ownership concentration, fund quality, buying/selling activity, ownership indicators, and institutional trend.
59 / 100Neutral
Institutions & Flow1,077 holders+1 net flow (+98 / -97)

AI Insights & Key Takeaways

  • Positive Institutional Flow (+1)
  • Tci Fund Management Ltd maintains a significant position
  • Top 10 holders control 47.6% of institutional value
  • No Insider Signal

Top Institutional Holders of MLM

Ranked by reported Q2 2026 13F market value

Top 10 Holders
47.6%
Top 25 Holders
69.3%

Share of total reported institutional value in MLM held by the largest 10 / 25 filers.

#InstitutionShares HeldMarket ValueQoQ ChangeOwnership %% of Fund
1BlackRock, Inc.4.7M$2.71B+0.1%7.815%0.04%
2VANGUARD CAPITAL MANAGEMENT LLC3.9M$2.27B+0.3%6.545%0.05%
3VANGUARD PORTFOLIO MANAGEMENT LLC3.2M$1.84B+1.2%5.325%

Quarterly Institutional Activity

Filings activity in MLM during Q2 2026, grouped by how each filer changed its position.

OverviewNew Buyers98Added To292Trimmed651Exited97

New Buyers

98

Institutions that opened a new MLM position in Q2 2026

  • TCI Fund Management Ltd

MLM Institutional Ownership by Quarter

8 quarters of 13F filings · Δ columns show change vs prior quarter

QuarterInst. HoldersΔ HoldersOwnership %Δ OwnershipTotal 13F ValueΔ Value
Q2 20261,077+0.6%99.04%+1.61 pp$32.66B+1.0%
Q1 20261,0712.2%97.43%0.91 pp$32.35B9.1%
Q4 20251,095+6.3%98.34%+0.89 pp$35.60B0.1%
Q3 20251,030+4.7%97.45%1.76 pp$35.64B+6.5%
Q2 2025984+6.3%99.21%+0.23 pp$33.46B+25%
Q1 2025926

MLM — Frequently Asked Questions

Quick answers to the most common questions about buying MLM stock.

What percentage of MLM is owned by institutions?

Based on Q2 2026 13F filings, institutional ownership of Martin Marietta Materials, Inc. stands at 99.0%, held across 1,077 reporting institutions.

Who is the largest institutional holder of MLM?

BlackRock, Inc. is the largest reported institutional holder of MLM, with approximately 4,692,446 shares worth $2.71B as of Q2 2026.

Is MLM a hedge fund favorite?

Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of MLM, including TCI Fund Management Ltd.

What is MLM's Smart Money Score?

Our composite Smart Money Score for MLM is 59 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.

How many institutions bought MLM this quarter?

98 institutions opened new positions in MLM during Q2 2026, while 97 fully exited. 292 added to existing positions and 651 trimmed.

0.08%
4STATE STREET CORP3.2M$1.82B+9.8%5.262%0.03%
5BANK OF AMERICA CORP /DE/2.4M$1.41B+2.0%4.075%0.09%
6FMR LLC2.2M$1.26B-15.9%3.651%0.05%
7PRINCIPAL FINANCIAL GROUP INC2.1M$1.22B+1.1%3.525%0.60%
8Aristotle Capital Management, LLC1.8M$1.06B-6.3%3.050%2.22%
9VICTORY CAPITAL MANAGEMENT INC1.8M$1.03B+8.9%2.970%0.58%
10GEODE CAPITAL MANAGEMENT, LLC1.6M$919.9M+0.8%2.667%0.05%
11JPMORGAN CHASE & CO1.5M$852.6M-21.1%2.443%0.05%
12TCI Fund Management Ltd1.3M$758.4M—2.190%1.44%
13GOLDMAN SACHS GROUP INC1.2M$670.9M+31.3%1.937%0.06%
14MORGAN STANLEY1.0M$583.6M-24.6%1.685%0.03%
15Select Equity Group, L.P.1.0M$583.2M-2.1%1.684%2.88%
16BAILLIE GIFFORD & CO992K$572.0M-8.8%1.652%0.52%
17GARDNER RUSSO & QUINN LLC705K$406.8M-1.4%1.175%4.56%
18KING LUTHER CAPITAL MANAGEMENT CORP653K$376.7M-2.0%1.088%1.54%
19Invesco Ltd.650K$374.6M-6.0%1.082%0.03%
20ALKEON CAPITAL MANAGEMENT LLC627K$361.8M-16.1%1.045%0.49%
21DIMENSIONAL FUND ADVISORS LP586K$338.1M+7.3%0.976%0.06%
22NORTHERN TRUST CORP570K$328.9M-2.8%0.950%0.04%
23NORGES BANK557K$321.3M—0.928%0.03%
24CHARLES SCHWAB INVESTMENT MANAGEMENT INC493K$284.0M+7.0%0.820%0.04%
25MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.486K$280.3M+8.5%0.809%0.33%

denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MLM — a direct measure of their conviction.

$758.4M
  • 59 North Capital Management, LP$123.5M
  • Freestone Grove Partners LP$71.7M
  • Junto Capital Management LP$71.2M
  • Bornite Capital Management LP$37.6M
  • RENAISSANCE TECHNOLOGIES LLC$18.4M
  • Cinctive Capital Management LP$17.3M
  • Fourth Sail Capital LP$15.6M
  • MONTANOVA CAPITAL, LLC$15.0M
  • ADAGE CAPITAL PARTNERS GP, L.L.C.$10.7M
  • SIH Partners, LLLP$9.8M
  • Artisan Partners Limited Partnership$9.2M
  • Exited Positions

    97

    Institutions that fully closed their MLM position in Q2 2026

    • JENNISON ASSOCIATES LLC$19.0M
    • Coalescence Partners Investment Management, LP$18.1M
    • Drummond Knight Asset Management Pty Ltd$15.4M
    • Verition Fund Management LLC$5.1M
    • Cercano Management LLC$4.9M
    • Man Group plc$4.2M
    • BANQUE PICTET & CIE SA$3.5M
    • SMA Capital LLC$3.0M
    • Regents Gate Capital LLP$3.0M
    • ASR Vermogensbeheer N.V.$2.5M
    • CULTIVAR CAPITAL, INC.$2.4M
    • Fremen Capital Management LP$2.4M
    3.7%
    98.98%
    +1.56 pp
    $26.83B
    5.1%
    Q4 2024962+5.1%97.42%0.15 pp$28.28B2.7%
    Q3 2024915—97.57%—$29.08B—

    Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.

    How is institutional ownership of MLM changing?

    MLM institutional ownership rose by 1.61 percentage points quarter-over-quarter, with a net change of +6 holders.

    How concentrated is MLM ownership among the top holders?

    The top 10 institutions account for 47.6% of all reported 13F value in MLM, and the top 25 account for 69.3%.

    Where does this MLM institutional ownership data come from?

    All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.

    MLMMartin Marietta Materials, Inc.
    $518.15$31.1B
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