WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Position in MLM — Martin Marietta Materials Inc
CIK 1644956
CHICAGO, IL
Position in MLM
as of Mar 31, 2026
· filed May 8, 2026
Position Value
$160,351,722
-$7,892,877 QoQ
Shares Held
272,392
+0.8% QoQ
Ownership
0.454%
of shares outstanding
% of Portfolio
0.53%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 88.75848042526945.ToString("F0")%
Shared 0.ToString("F0")%
None 11.241519574730535.ToString("F0")%
Common Shares in MLM Over Time
Shares Held
Position Value (USD)
Position in Building Materials
Basic Materials · as of Mar 31, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $374,486,365 across 5 Building Materials names. MLM ranks #1 (42.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MLM |
Martin Marietta Materials Inc
This page
|
272,392 | $160,351,722 | |
| 2 | EXP |
Eagle Materials Inc
|
630,392 | $119,427,764 | |
| 3 | TGLS |
Tecnoglass Inc.
|
1,173,073 | $52,260,402 | |
| 4 | USLM |
United States Lime & Minerals Inc
|
286,260 | $37,388,418 | |
| 5 | CRH |
Crh Public Ltd Co
|
48,117 | $5,058,059 |
All Filings in MLM
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $160,351,722 | 272,392 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $168,244,599 | 270,203 | Shares | Sole | 2026-02-09 | |
| 2025-09-30 | $174,811,939 | 277,356 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $157,395,066 | 286,715 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $139,973,513 | 292,752 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $226,331,333 | 438,202 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $223,629,418 | 415,475 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $203,072,599 | 374,811 | Shares | Sole | 2024-08-08 | |
| 2024-03-31 | $227,902,509 | 371,213 | Shares | Sole | 2024-05-08 | |
| 2023-12-31 | $165,832,195 | 332,389 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $82,847,999 | 201,832 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $240,109,271 | 520,066 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $149,415,639 | 420,818 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $169,812,688 | 502,449 | Shares | Sole | 2023-02-09 | |
| 2022-09-30 | $171,509,704 | 532,490 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $92,285,915 | 308,401 | Shares | Sole | 2022-08-10 | |
| 2022-03-31 | $121,386,223 | 315,379 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $297,621,038 | 675,613 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $290,022,084 | 848,812 | Shares | Sole | 2021-11-10 | |
| 2021-06-30 | $340,556,301 | 968,012 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $329,886,732 | 982,332 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $329,734,605 | 1,161,160 | Shares | Sole | 2021-02-09 | |
| 2020-09-30 | $276,881,034 | 1,176,415 | Shares | Sole | 2020-11-06 | |
| 2020-06-30 | $246,605,125 | 1,193,809 | Shares | Sole | 2020-08-12 | |
| 2020-03-31 | $215,676,595 | 1,139,759 | Shares | Sole | 2020-05-08 | |
| No filing history on record for this holder in this stock. | ||||||