CapitolRadar tracks every publicly disclosed MLM trade by US congress members and corporate insiders: 33 disclosed trades (18 buys, 15 sells) by 4 tracked traders, from 2022-01-11 to 2026-09-25. Updated daily from official filings.
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Martin Marietta Materials, Inc. (MLM) — Basic Materials · Construction Materials, market cap about $28.3B.
CapitolRadar analysis
31 tracked trades split almost evenly
31 trades in Martin Marietta Materials were tracked from January 11, 2022 through August 25, 2026: 16 buys and 15 sells by four distinct traders. The one-trade difference makes the overall record nearly balanced between purchases and sales. Three identified buyers account for all 16 reported buys: Ro Khanna with 14, April Delaney with one and Michael McCaul with one. The supplied data does not identify the fourth trader or provide a trader-level breakdown of the 15 sales.
3 trades in 2026 Q3 led the recent quarterly record
3 trades, including one buy, were recorded in 2026 Q3. That followed two trades with one buy in Q2 and one sale in Q1. The 2025 quarterly sequence was two sales in Q4, two trades with one buy in Q3, one sale in Q2 and one buy in Q1. One buy was also recorded in 2024 Q4. These eight disclosed quarters contain 13 trades, so they represent only part of the 31-trade history.
Ro Khanna’s latest buy was dated June 5, 2026. April Delaney’s sole buy was dated August 19, 2026, while Michael McCaul’s was dated March 17, 2025. With only four distinct traders—and only one MLM purchase each for Delaney and McCaul—the sample is small and heavily concentrated in one buyer.
6 overlapping tickers, each shared by two buyers
2 of the MLM buyers also bought each of HUBB, DELL, WDAY, META, BAX and BSX. The data does not specify which two buyers overlap on each ticker, transaction counts for those stocks or timing relationships, so the overlap alone does not establish a common strategy or motive.
Congressional transaction disclosures can arrive up to 45 days after a trade, making the record delayed rather than real time. Reported amount ranges, when available, are estimates rather than exact transaction values; no dollar ranges are supplied here. Those limitations, alongside the small trader sample, constrain comparisons of conviction or exposure.
Analysis written from the tracked record on 2026-09-11; it is refreshed whenever the underlying numbers change.
Activity by quarter
| Quarter | Disclosed trades | Buys | Sells |
|---|---|---|---|
| 2026 Q3 | 5 | 3 | 2 |
| 2026 Q2 | 2 | 1 | 1 |
| 2026 Q1 | 1 | 0 | 1 |
| 2025 Q4 | 2 | 0 | 2 |
| 2025 Q3 | 2 | 1 | 1 |
| 2025 Q2 | 1 | 0 | 1 |
| 2025 Q1 | 1 | 1 | 0 |
| 2024 Q4 | 1 | 1 | 0 |
Who is buying MLM?
| Trader | Disclosed buys | Last buy | Grade |
|---|---|---|---|
| Ro Khanna | 16 | 2026-09-25 | — |
| April Delaney | 1 | 2026-08-19 | — |
| Michael McCaul | 1 | 2025-03-17 | — |
Disclosed trades in MLM
| Date | Who | Type | Amount | 30d vs SPY |
|---|---|---|---|---|
| 2026-09-25 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2026-09-11 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2026-08-25 | April Delaney | sell | $250,001 - $500,000 | — |
| 2026-08-19 | April Delaney | buy | $1,001 - $15,000 | — |
| 2026-08-10 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2026-06-05 | Ro Khanna | buy | $15,001 - $50,000 | — |
| 2026-04-09 | Josh Gottheimer | sell | $15,001 - $50,000 | — |
| 2026-01-29 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2025-10-28 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2025-10-27 | Michael McCaul | sell | $1,001 - $15,000 | — |
| 2025-09-24 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2025-08-06 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2025-06-16 | Michael McCaul | sell | $1,001 - $15,000 | — |
| 2025-03-17 | Michael McCaul | buy | $15,001 - $50,000 | — |
| 2024-10-14 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2024-09-18 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2024-09-09 | Ro Khanna | sell | $1,001 - $15,000 | — |
| 2024-09-06 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2024-09-05 | Ro Khanna | buy | $1,001 - $15,000 | — |
| 2024-01-10 | Ro Khanna | sell | $1,001 - $15,000 | — |
These buyers also bought
Other stocks the tracked buyers of MLM disclosed buying in the last six months: TER (2) · WDAY (2) · AJG (2) · DHR (2) · P (2) · MA (2).
About Martin Marietta Materials, Inc.
Martin Marietta Materials, Inc. functions as a company specializing in natural resource-derived building materials. This enterprise delivers a wide range of aggregates and other heavy construction components to the building industry, serving both domestic and international markets. Its product portfolio includes foundational raw materials like crushed stone, sand, and gravel, in addition to manufactured items such as ready-mix concrete, asphalt, and comprehensive paving solutions. These offerings are essential for infrastructure projects, commercial and residential developments, and various ot…
Frequently asked questions
Which politicians bought MLM most?
Ro Khanna leads with 16 disclosed buys, followed by April Delaney.
How current is this page?
It re-renders from the tracked record on every view and new filings are ingested daily — but STOCK Act disclosures can lag the trade by up to 45 days, so the most recent weeks are always incomplete.
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CapitolRadar tracks publicly disclosed trades (STOCK Act filings and SEC Form 4). Disclosures can lag the trade by up to 45 days. Backtests measure past disclosed buys against the S&P 500 and do not predict future results. Everything on this page is impersonal information for your own research — not investment advice.