FRONTIER CAPITAL MANAGEMENT CO LLC
Position in ROCK — Gibraltar Industries, Inc.
CIK 351173
Boston, MA
Position in ROCK
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$37,445,267
+$10,003,863 QoQ
Shares Held
830,272
+20.6% QoQ
Ownership
2.80%
of shares outstanding
% of Portfolio
0.35%
of 13F equity value
Holder Rank
#9
of 243 holders
Holding Since
Sep 2025
4 quarters on record
Voting authority
Sole 63%
Shared 0%
None 37%
Common Shares in ROCK Over Time
Shares Held
Position Value (USD)
Position in Building Products & Equipment
Industrials · as of Jun 30, 2026FRONTIER CAPITAL MANAGEMENT CO LLC holds $95,731,554 across 2 Building Products & Equipment names. ROCK ranks #2 (39.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BLDR |
Builders FirstSource, Inc.
|
651,389 | $58,286,287 | |
| 2 | ROCK |
Gibraltar Industries, Inc.
This page
|
830,272 | $37,445,267 |
All Filings in ROCK
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4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $37,445,267 | 830,272 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $27,441,404 | 688,272 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $27,076,705 | 547,668 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $23,572,168 | 375,353 | Shares | Sole | 2025-11-14 | |
| No filing history on record for this holder in this stock. | ||||||