# MARTIN MARIETTA MATLS INC (MLM) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 573284106
Page URL: https://superinvestorclub.com/stock/MLM
Last updated: 2026-08-29T13:48:48.598Z

## Summary

As of the most recent 13F filing period, MARTIN MARIETTA MATLS INC (MLM) is held by 4 tracked superinvestors with an aggregate position value of $1.39B representing 0131510970536734506047370 shares.

## Top institutional holders (4)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Chris Hohn](https://superinvestorclub.com/manager/24) | TCI Fund Management | 1315109 | $758.4M | 1.44% | 2026-06-30 |
| 2 | [Tom Russo](https://superinvestorclub.com/manager/30) | Gardner Russo & Gardner | 705367 | $406.8M | 4.56% | 2026-06-30 |
| 3 | [Dan Sundheim](https://superinvestorclub.com/manager/303) | D1 Capital Partners | 345060 | $199.0M | 0.57% | 2026-06-30 |
| 4 | [Wallace Weitz](https://superinvestorclub.com/manager/82) | Weitz Investment Management | 47370 | $27.3M | 1.89% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2023-09-30: 2 holders, $419.0M aggregate, 095876362000 shares
- 2023-12-31: 2 holders, $493.9M aggregate, 094056849300 shares
- 2024-03-31: 2 holders, $508.4M aggregate, 078748040675 shares
- 2024-06-30: 2 holders, $436.0M aggregate, 076405940675 shares
- 2024-09-30: 3 holders, $535.8M aggregate, 075007220467440675 shares
- 2024-12-31: 3 holders, $428.7M aggregate, 07070108227640675 shares
- 2025-03-31: 4 holders, $599.7M aggregate, 071425233331616533841275 shares
- 2025-06-30: 3 holders, $596.9M aggregate, 071277933319641275 shares
- 2025-09-30: 4 holders, $667.7M aggregate, 0687537328647412751855 shares
- 2025-12-31: 3 holders, $677.9M aggregate, 072661232075441275 shares
- 2026-03-31: 4 holders, $634.9M aggregate, 071541132285739775470 shares
- 2026-06-30: 4 holders, $1.39B aggregate, 0131510970536734506047370 shares

## Recent congressional trades (32)

- 2026-07-24: April McClain Delaney (Democrat-MD) purchase $15,001 - $50,000
- 2026-07-20: April McClain Delaney (Democrat-MD) purchase $1,001 - $15,000
- 2026-07-17: April McClain Delaney (Democrat-MD) purchase $1,001 - $15,000
- 2026-05-28: April McClain Delaney (Democrat-MD) purchase $1,001 - $15,000
- 2026-04-09: Josh Gottheimer (Democrat-NJ) sale $15,001 - $50,000
- 2026-03-09: April McClain Delaney (Democrat-MD) purchase $1,001 - $15,000
- 2025-12-02: April McClain Delaney (Democrat-MD) purchase $1,001 - $15,000
- 2025-11-03: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-10-28: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-10-27: Michael McCaul (Republican-TX) sale $1,001 - $15,000
- 2025-09-23: Valerie Hoyle (D-OR) sale $1,001 - $15,000
- 2025-08-21: Michael McCaul (Republican-TX) sale $1,001 - $15,000
- 2025-08-06: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-08-01: April McClain Delaney (Democrat-MD) sale $1,001 - $15,000
- 2025-06-16: Michael McCaul (Republican-TX) sale $1,001 - $15,000

## Recent insider transactions (0)


## Citation

When citing, use: "MARTIN MARIETTA MATLS INC (MLM) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MLM), aggregating SEC 13F, Form 4, and congressional disclosures."