Gibraltar Industries, Inc.
US ˙ NasdaqGS ˙ US3746891072

SecurityROCK / Gibraltar Industries, Inc.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership249,672 shares
Latest Disclosed Value $ 9,954,423
D. E. Shaw & Co., Inc. reports 21.94% decrease in ownership of ROCK / Gibraltar Industries, Inc.

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 249,672 shares of Gibraltar Industries, Inc. (US:ROCK) valued at $9,954,423 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 319,842 shares of Gibraltar Industries, Inc.. This represents a change in shares of -21.94% during the quarter. The current value of the position is $9,395,157 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F GIBRALTAR INDS COM 374689107 249,672 -70,170 -21.94 9,954 -37.05 0.0060
2026-02-17 2025-12-31 13F GIBRALTAR INDS COM 374689107 319,842 -5,645 -1.73 15,813 -22.64 0.0087
2025-11-14 2025-09-30 13F GIBRALTAR INDS COM 374689107 325,487 -33,007 -9.21 20,441 -3.36 0.0115
2025-08-14 2025-06-30 13F GIBRALTAR INDS COM 374689107 358,494 5,095 1.44 21,151 2.03 0.0150
2025-05-15 2025-03-31 13F GIBRALTAR INDS COM 374689107 353,399 161,301 83.97 20,730 83.22 0.0185
2025-02-14 2024-12-31 13F GIBRALTAR INDS COM 374689107 192,098 82,965 76.02 11,315 48.26 0.0083
2024-11-14 2024-09-30 13F GIBRALTAR INDS COM 374689107 109,133 -2,783 -2.49 7,632 -0.52 0.0066
2024-08-14 2024-06-30 13F GIBRALTAR INDS COM 374689107 111,916 77,781 227.86 7,672 179.15 0.0072
2024-05-15 2024-03-31 13F GIBRALTAR INDS COM 374689107 34,135 -31,575 -48.05 2,749 -47.04 0.0024
2024-02-14 2023-12-31 13F GIBRALTAR INDS COM 374689107 65,710 -3,855 -5.54 5,190 10.50 0.0045
2023-11-14 2023-09-30 13F GIBRALTAR INDS COM 374689107 69,565 -475 -0.68 4,696 6.58 0.0049
2023-08-14 2023-06-30 13F GIBRALTAR INDS COM 374689107 70,040 -7,105 -9.21 4,407 17.78 0.0045
2023-05-15 2023-03-31 13F GIBRALTAR INDS COM 374689107 77,145 -8,793 -10.23 3,742 -5.10 0.0040
2023-02-14 2022-12-31 13F GIBRALTAR INDS COM 374689107 85,938 -100,213 -53.83 3,943 -48.27 0.0044
2022-11-14 2022-09-30 13F GIBRALTAR INDS COM 374689107 186,151 -76,288 -29.07 7,620 -25.07 0.0091
2022-08-15 2022-06-30 13F GIBRALTAR INDS COM 374689107 262,439 -34,311 -11.56 10,169 -20.22 0.0119
2022-05-16 2022-03-31 13F GIBRALTAR INDS COM 374689107 296,750 192,164 183.74 12,746 82.76 0.0119
2022-02-14 2021-12-31 13F GIBRALTAR INDS COM 374689107 104,586 32,605 45.30 6,974 39.12 0.0058
2021-11-15 2021-09-30 13F GIBRALTAR INDS COM 374689107 71,981 11,814 19.64 5,013 9.19 0.0045
2021-08-16 2021-06-30 13F GIBRALTAR INDS COM 374689107 60,167 24,576 69.05 4,591 40.96 0.0040
2021-05-17 2021-03-31 13F GIBRALTAR INDS COM 374689107 35,591 -87,496 -71.08 3,257 -63.22 0.0031
2021-02-16 2020-12-31 13F GIBRALTAR INDS COM 374689107 123,087 -109,293 -47.03 8,855 -41.50 0.0079
2020-11-16 2020-09-30 13F GIBRALTAR INDS COM 374689107 232,380 -82,136 -26.12 15,137 0.25 0.0155
2020-08-14 2020-06-30 13F GIBRALTAR INDS COM 374689107 314,516 12,945 4.29 15,100 16.66 0.0180
2020-05-15 2020-03-31 13F GIBRALTAR INDS COM 374689107 301,571 -27,774 -8.43 12,944 -22.08 0.0202
2020-02-14 2019-12-31 13F GIBRALTAR INDS COM 374689107 329,345 146,636 80.26 16,612 97.90 0.0190
2019-11-14 2019-09-30 13F GIBRALTAR INDS COM 374689107 182,709 24,149 15.23 8,394 31.16 0.0103
2019-08-14 2019-06-30 13F GIBRALTAR INDS COM 374689107 158,560 -36,252 -18.61 6,400 -19.10 0.0080
2019-05-15 2019-03-31 13F GIBRALTAR INDS COM 374689107 194,812 -42,304 -17.84 7,911 -6.26 0.0102
2019-02-14 2018-12-31 13F GIBRALTAR INDS COM 374689107 237,116 -49,045 -17.14 8,439 -35.33 0.0116
2018-11-14 2018-09-30 13F GIBRALTAR INDS COM 374689107 286,161 -14,852 -4.93 13,049 15.60 0.0157
2018-08-14 2018-06-30 13F GIBRALTAR INDS COM 374689107 301,013 12,948 4.49 11,288 15.76 0.0147
2018-05-15 2018-03-31 13F GIBRALTAR INDS COM 374689107 288,065 36,650 14.58 9,751 17.52 0.0133
2018-02-14 2017-12-31 13F GIBRALTAR INDS COM 374689107 251,415 121,095 92.92 8,297 104.36 0.0114
2017-11-14 2017-09-30 13F GIBRALTAR INDS COM 374689107 130,320 63,571 95.24 4,060 70.59 0.0062
2017-08-14 2017-06-30 13F GIBRALTAR INDS COM 374689107 66,749 46,956 237.24 2,380 192.02 0.0039
2017-05-15 2017-03-31 13F GIBRALTAR INDS COM 374689107 19,793 -24,272 -55.08 815 -55.59 0.0014
2017-02-14 2016-12-31 13F GIBRALTAR INDS COM 374689107 44,065 -70,884 -61.67 1,835 -57.04 0.0031
2016-11-14 2016-09-30 13F GIBRALTAR INDS COM 374689107 114,949 -27,077 -19.06 4,271 -4.75 0.0075
2016-08-15 2016-06-30 13F GIBRALTAR INDS COM 374689107 142,026 21,059 17.41 4,484 29.60 0.0083
2016-05-16 2016-03-31 13F GIBRALTAR INDS COM 374689107 120,967 -4,543 -3.62 3,460 8.36 0.0062
2016-02-16 2015-12-31 13F GIBRALTAR INDS COM 374689107 125,510 -19,067 -13.19 3,193 20.35 0.0048
2015-11-16 2015-09-30 13F GIBRALTAR INDS COM 374689107 144,577 46,363 47.21 2,653 32.58 0.0039
2015-08-14 2015-06-30 13F GIBRALTAR INDS COM 374689107 98,214 27,939 39.76 2,001 73.55 0.0030
2015-05-15 2015-03-31 13F GIBRALTAR INDS COM 374689107 70,275 -5,292 -7.00 1,153 -6.18 0.0018
2015-02-17 2014-12-31 13F GIBRALTAR INDS COM 374689107 75,567 -14,182 -15.80 1,229 0.00 0.0016
2014-11-14 2014-09-30 13F GIBRALTAR INDS COM 374689107 89,749 10,788 13.66 1,229 0.33 0.0016
2014-08-14 2014-06-30 13F GIBRALTAR INDS COM 374689107 78,961 7,134 9.93 1,225 -9.59 0.0017
2014-05-15 2014-03-31 13F GIBRALTAR INDS COM 374689107 71,827 4,939 7.38 1,355 9.01 0.0019
2014-02-14 2013-12-31 13F GIBRALTAR INDS COM 374689107 66,888 -10,073 -13.09 1,243 13.31 0.0017
2013-11-20 2013-09-30 13F/A-1 GIBRALTAR INDS COM 374689107 76,961 -15,654 -16.90 1,097 -18.62 0.0017
2013-11-14 2013-09-30 13F GIBRALTAR INDS COM 374689107 76,961 1,097
2013-08-14 2013-06-30 13F GIBRALTAR INDS COM 374689107 92,615 92,615 1,348 0.0025
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.