Who owns MLM?
Institutional ownership of Martin Marietta Materials Inc. from Form 13F, Q2 2026
1,071 institutional managers reported holding Martin Marietta Materials Inc. (MLM) in Form 13F filings for Q2 2026, with 59,281,485 shares worth $34.2B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 926,646 shares (+1.6%). 101 opened new positions and 96 sold out.
- Funds holding
- 1,071
- Value held
- $34.2B
- New / sold out
- 101 / 96
- Net shares, same filers
- +1.6%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of MLM
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| BlackRock, Inc. | $2.7B | 7.9% | 4,692,446 | Added |
| Vanguard Capital Management LLC | $2.3B | 6.6% | 3,929,705 | Added |
| Vanguard Portfolio Management LLC | $1.8B | 5.4% | 3,197,395 | Added |
| State Street Corp | $1.8B | 5.3% | 3,159,639 | Added |
| Bank of America Corp | $1.4B | 4.1% | 2,446,762 | Added |
| FMR LLC | $1.3B | 3.7% | 2,192,603 | Trimmed |
| Principal Financial Group Inc | $1.2B | 3.6% | 2,116,369 | Added |
| Aristotle Capital Management, LLC | $1.1B | 3.1% | 1,831,597 | Trimmed |
| Victory Capital Management Inc | $1.0B | 3.0% | 1,783,432 | Added |
| Price T Rowe Associates Inc | $922M | 2.7% | 1,599,324 | Added |
| Geode Capital Management, LLC | $920M | 2.7% | 1,601,490 | Added |
| JPMorgan Chase & Co | $853M | 2.5% | 1,466,887 | Trimmed |
| Tci Fund Management LTD | $758M | 2.2% | 1,315,109 | New |
| Goldman Sachs Group Inc | $671M | 2.0% | 1,163,330 | Added |
| Morgan Stanley | $584M | 1.7% | 1,012,016 | Trimmed |
| Select Equity Group, L.P. | $583M | 1.7% | 1,011,255 | Trimmed |
| Baillie Gifford & Co | $572M | 1.7% | 991,786 | Trimmed |
| Gardner Russo & Quinn LLC | $407M | 1.2% | 705,367 | Trimmed |
| King Luther Capital Management Corp | $377M | 1.1% | 653,184 | Trimmed |
| Invesco Ltd. | $375M | 1.1% | 649,575 | Trimmed |
| T. Rowe Price Investment Management, Inc. | $370M | 1.1% | 641,321 | Trimmed |
| Alkeon Capital Management LLC | $362M | 1.1% | 627,351 | Trimmed |
| Dimensional Fund Advisors LP | $338M | 1.0% | 586,145 | Added |
| Northern Trust Corp | $329M | 1.0% | 570,346 | Trimmed |
| Norges Bank | $321M | 0.9% | 557,143 | New |
Share of 13F holdings is each fund's shares as a share of the 59,281,485 MLM shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Tci Fund Management LTD New+$758M
- Norges Bank New+$321M
- State Street Corp Added+$163M
- Goldman Sachs Group Inc Added+$160M
- 59 North Capital Management, LP New+$123M
- Victory Capital Management Inc Added+$84.4M
- Freestone Grove Partners LP New+$71.7M
- Junto Capital Management LP New+$71.2M
- Price T Rowe Associates Inc Added+$63.7M
- Hawk Ridge Capital Management LP Added+$45.1M
Biggest sellers in Q2 2026
- FMR LLC Trimmed-$240M
- JPMorgan Chase & Co Trimmed-$229M
- Morgan Stanley Trimmed-$190M
- T. Rowe Price Investment Management, Inc. Trimmed-$179M
- Congress Asset Management Co Trimmed-$102M
- Aristotle Capital Management, LLC Trimmed-$71.2M
- Alkeon Capital Management LLC Trimmed-$69.2M
- Baillie Gifford & Co Trimmed-$55.1M
- William Blair Investment Management, LLC Trimmed-$52.2M
- CIBC Bancorp USA Inc. Trimmed-$48.4M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $2.7B and sold $2.2B; 351 added and 385 trimmed.
Schedule 13D and 13G filings on MLM
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-08-07STATE STREET CORP SCHEDULE 13G filed by Martin Marietta Materials Inc.Schedule 13G
Questions about MLM ownership
- Who owns MLM stock?
- 1,071 institutional investment managers reported MLM positions in their Form 13F filings for Q2 2026, holding 59,281,485 shares worth $34.2B in total. BlackRock, Inc. reported the largest position.
- Are funds buying or selling MLM?
- In Q2 2026, 101 managers opened new MLM positions, 351 added, 385 trimmed and 96 sold out. Managers that filed in both quarters added a net 926,646 shares.
- How current is this MLM institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to MLM by CUSIP. Options are left out. MLM news and filings · MLM insider trades · Top funds