MLM Martin Marietta Materials
Materials, filed as MARTIN MARIETTA MATLS INC (COM), Equity As of 2026 Q3 among managers we track Quote on Google Finance, opens in a new tab
In 2026 Q3 Andrew Steginsky trimmed Martin Marietta Materials.
Who owns this now
Largest portfolio weights among holders, up to 10.6% (Andrew Steginsky, Steginsky Capital). Not free-float ownership.
Who owns MLM
Sorted by value, long equity only, as of 2026 Q3.
| History | |||||
|---|---|---|---|---|---|
| Andrew Steginsky, Steginsky Capital | Reduce −2.5% | 135,021 | $65M | History |
Insider trades
Open-market buys and sales by MLM's executives, directors and 10% owners in the last 12 months, from their Form 4s
- None no insider bought on the open market
- None no sales outside a trading plan
- None no planned (10b5-1) sales
No open-market buys or sales on file.
Also filed in the last 12 months, not counted as buying or selling: 39 stock grants, 20 share withholdings for taxes, and 1 gift.
Congress
4 members of Congress traded MLM in the last three years: 9 buys and 5 sales. 5 members listed it in 2025 annual reports.
-
April McClain Delaney
Sell
$250K–$500K
Aug 25
filed Sep 9
-
April McClain Delaney
Buy
$1K–$15K
Aug 19
filed Sep 9
-
April McClain Delaney
Buy
$15K–$50K
Jul 24
filed Aug 3
-
April McClain Delaney
Buy
$1K–$15K
Jul 20
filed Aug 3
-
April McClain Delaney
Buy
$1K–$15K
Jul 17
filed Aug 3
-
April McClain Delaney
Buy
$1K–$15K
May 28
filed Jun 5
SEC filings
Recent issuer filings from EDGAR, 21 shown.
| Filed | Form | Detail | Links |
|---|---|---|---|
| 8-K | 1.01,9.01 | Filing Doc | |
| SCHEDULE 13D | — | Filing Doc | |
| 8-K | 1.01,2.01,3.02,5.02,7.01,9.01 | Filing Doc | |
| 8-K | 1.01,1.02,2.03,9.01 | Filing Doc | |
| 8-K | 1.01,2.03,8.01,9.01 | Filing Doc | |
| 424B2 | Filing Doc | ||
| 8-K | 1.01,7.01,9.01 | Filing Doc | |
| 8-K | 8.01,9.01 | Filing Doc | |
| 424B5 | Filing Doc | ||
| SCHEDULE 13G | — | Filing Doc | |
| 8-K | 8.01,9.01 | Filing Doc | |
| 8-K | 5.02 | Filing Doc | |
| 8-K | 2.02,7.01,9.01 | Filing Doc | |
| 10-Q | Filing Doc | ||
| 8-K | 1.01,2.03,9.01 | Filing Doc | |
| 8-K | 7.01,9.01 | Filing Doc | |
| 8-K | 1.01,3.02,8.01,9.01 | Filing Doc | |
| 8-K | 5.02,5.07,9.01 | Filing Doc | |
| SCHEDULE 13G | — | Filing Doc | |
| 8-K | 2.02,7.01 | Filing Doc | |
| 10-Q | Filing Doc |
No filings match this filter.
Financials
US-GAAP annual figures by fiscal year, as tagged in Form 10-K. Each value links to its SEC filing.
Income statement
Balance sheet
Ownership over time
13Fs that reported it each quarter. Click a bar for that quarter’s holders.