Position in ROCK
as of Jun 30, 2026
· filed Aug 4, 2026
Position Value
$20,954,722
-$6,421,015 QoQ
Shares Held
464,628
-32.3% QoQ
Ownership
1.57%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#14
of 243 holders
Holding Since
Mar 2020
16 quarters on record
Voting authority
Sole 95%
Shared 0%
None 5%
Common Shares in ROCK Over Time
Shares Held
Position Value (USD)
Position in Building Products & Equipment
Industrials · as of Jun 30, 2026Boston Partners holds $597,650,398 across 8 Building Products & Equipment names. ROCK ranks #4 (3.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MAS |
Masco Corp /De/
|
4,606,061 | $374,795,181 | |
| 2 | CSL |
Carlisle Companies Inc
|
439,955 | $159,593,675 | |
| 3 | LPX |
Louisiana-Pacific Corp
|
330,462 | $25,994,139 | |
| 4 | ROCK |
Gibraltar Industries, Inc.
This page
|
464,628 | $20,954,722 | |
| 5 | LMB |
Limbach Holdings, Inc.
|
167,873 | $12,926,221 | |
| 6 | BLDR |
Builders FirstSource, Inc.
|
28,126 | $2,516,714 | |
| 7 | NPKI |
NPK International Inc.
|
41,828 | $665,483 | |
| 8 | OC |
Owens Corning
|
1,285 | $204,263 |
All Filings in ROCK
Export CSV
16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $20,954,722 | 464,628 | Shares | Defined | 2026-08-04 | |
| 2026-03-31 | $27,375,737 | 686,625 | Shares | Defined | 2026-05-11 | |
| 2025-12-31 | $45,668,270 | 923,711 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $1,618,732 | 25,776 | Shares | Defined | 2025-11-13 | |
| 2022-12-31 | $665,948 | 14,515 | Shares | Defined | 2023-02-08 | |
| 2022-09-30 | $580,305 | 14,178 | Shares | Defined | 2022-11-09 | |
| 2022-06-30 | $538,470 | 13,896 | Shares | Defined | 2022-08-10 | |
| 2022-03-31 | $359,534 | 8,371 | Shares | Defined | 2022-05-10 | |
| 2021-12-31 | $541,908 | 8,127 | Shares | Defined | 2022-02-04 | |
| 2021-09-30 | $643,705 | 9,242 | Shares | Defined | 2021-11-05 | |
| 2021-06-30 | $806,901 | 10,574 | Shares | Defined | 2021-08-12 | |
| 2021-03-31 | $1,087,962 | 11,889 | Shares | Defined | 2021-05-10 | |
| 2020-12-31 | $1,182,981 | 16,444 | Shares | Defined | 2021-02-10 | |
| 2020-09-30 | $1,636,186 | 25,118 | Shares | Defined | 2020-11-13 | |
| 2020-06-30 | $1,217,485 | 25,359 | Shares | Defined | 2020-08-12 | |
| 2020-03-31 | $1,241,933 | 28,936 | Shares | Defined | 2020-05-13 | |
| No filing history on record for this holder in this stock. | ||||||