Gibraltar Industries, Inc.
US ˙ NasdaqGS ˙ US3746891072

SecurityROCK / Gibraltar Industries, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership34,590 shares
Latest Disclosed Value $ 1,379,103
Citigroup Inc reports 8.76% increase in ownership of ROCK / Gibraltar Industries, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 34,590 shares of Gibraltar Industries, Inc. (US:ROCK) valued at $1,379,103 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 31,805 shares of Gibraltar Industries, Inc.. This represents a change in shares of 8.76% during the quarter. The current value of the position is $1,301,622 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)
2026-05-11 2026-03-31 13F GIBRALTAR INDS COM 374689107 34,590 2,785 8.76 1,379 -12.28 0.0003
2026-02-13 2025-12-31 13F GIBRALTAR INDS COM 374689107 31,805 -38,726 -54.91 1,572 -64.51 0.0007
2025-11-10 2025-09-30 13F GIBRALTAR INDS COM 374689107 70,531 15,555 28.29 4,429 36.57 0.0020
2025-08-11 2025-06-30 13F GIBRALTAR INDS COM 374689107 54,976 -46,558 -45.85 3,244 -45.54 0.0016
2025-05-12 2025-03-31 13F GIBRALTAR INDS COM 374689107 101,534 42,528 72.07 5,956 71.37 0.0030
2025-02-12 2024-12-31 13F GIBRALTAR INDS COM 374689107 59,006 238 0.40 3,475 -15.43 0.0021
2024-11-12 2024-09-30 13F GIBRALTAR INDS COM 374689107 58,768 13,392 29.51 4,110 32.12 0.0024
2024-08-12 2024-06-30 13F GIBRALTAR INDS COM 374689107 45,376 9,057 24.94 3,111 6.36 0.0020
2024-05-10 2024-03-31 13F GIBRALTAR INDS COM 374689107 36,319 3,885 11.98 2,925 14.17 0.0019
2024-02-09 2023-12-31 13F GIBRALTAR INDS COM 374689107 32,434 9,157 39.34 2,562 63.02 0.0018
2023-12-06 2023-09-30 13F/A-1 GIBRALTAR INDS COM 374689107 23,277 -9,955 -29.96 1,571 -24.83 0.0012
2023-11-09 2023-09-30 13F GIBRALTAR INDS COM 374689107 23,277 -9,955 1,571 0.0012
2023-08-10 2023-06-30 13F GIBRALTAR INDS COM 374689107 33,232 16,175 94.83 2,091 152.72 0.0014
2023-05-11 2023-03-31 13F GIBRALTAR INDS COM 374689107 17,057 -3,286 -16.15 827 -11.36 0.0006
2023-02-09 2022-12-31 13F GIBRALTAR INDS COM 374689107 20,343 1,958 10.65 933 24.07 0.0007
2022-11-10 2022-09-30 13F GIBRALTAR INDS COM 374689107 18,385 215 1.18 752 6.82 0.0005
2022-08-10 2022-06-30 13F GIBRALTAR INDS COM 374689107 18,170 -13,682 -42.95 704 -48.54 0.0005
2022-05-12 2022-03-31 13F GIBRALTAR INDS COM 374689107 31,852 3,456 12.17 1,368 -27.73 0.0008
2022-02-10 2021-12-31 13F GIBRALTAR INDS COM 374689107 28,396 5,806 25.70 1,893 20.34 0.0010
2021-11-10 2021-09-30 13F GIBRALTAR INDS COM 374689107 22,590 4,543 25.17 1,573 14.23 0.0009
2021-08-10 2021-06-30 13F GIBRALTAR INDS COM 374689107 18,047 12,889 249.88 1,377 191.74 0.0008
2021-05-13 2021-03-31 13F GIBRALTAR INDS COM 374689107 5,158 -13,732 -72.69 472 -65.27 0.0003
2021-02-11 2020-12-31 13F GIBRALTAR INDS COM 374689107 18,890 7,322 63.30 1,359 80.24 0.0008
2020-11-12 2020-09-30 13F GIBRALTAR INDS COM 374689107 11,568 -20,662 -64.11 754 -51.26 0.0005
2020-08-12 2020-06-30 13F GIBRALTAR INDS COM 374689107 32,230 14,787 84.77 1,547 106.54 0.0012
2020-05-12 2020-03-31 13F GIBRALTAR INDS COM 374689107 17,443 -15,562 -47.15 749 -55.02 0.0007
2020-02-12 2019-12-31 13F GIBRALTAR INDS COM 374689107 33,005 9,214 38.73 1,665 52.33 0.0012
2019-11-08 2019-09-30 13F GIBRALTAR INDS COM 374689107 23,791 -700 -2.86 1,093 10.63 0.0009
2019-08-12 2019-06-30 13F GIBRALTAR INDS COM 374689107 24,491 4,498 22.50 988 21.67 0.0008
2019-05-13 2019-03-31 13F GIBRALTAR INDS COM 374689107 19,993 2,330 13.19 812 29.09 0.0008
2019-02-12 2018-12-31 13F GIBRALTAR INDS COM 374689107 17,663 9,197 108.63 629 62.95 0.0006
2018-11-13 2018-09-30 13F GIBRALTAR INDS COM 374689107 8,466 1,755 26.15 386 53.17 0.0003
2018-08-10 2018-06-30 13F GIBRALTAR INDS COM 374689107 6,711 -617 -8.42 252 1.61 0.0002
2018-05-11 2018-03-31 13F GIBRALTAR INDS COM 374689107 7,328 -4,549 -38.30 248 -36.73 0.0002
2018-02-12 2017-12-31 13F GIBRALTAR INDS COM 374689107 11,877 -11,661 -49.54 392 -46.52 0.0003
2017-11-13 2017-09-30 13F GIBRALTAR INDS COM 374689107 23,538 -8,953 -27.56 733 -36.76 0.0006
2017-08-11 2017-06-30 13F GIBRALTAR INDS COM 374689107 32,491 3,267 11.18 1,159 -3.74 0.0010
2017-05-12 2017-03-31 13F GIBRALTAR INDS COM 374689107 29,224 -29,146 -49.93 1,204 -50.47 0.0011
2017-02-10 2016-12-31 13F GIBRALTAR INDS COM 374689107 58,370 34,660 146.18 2,431 175.94 0.0022
2016-11-10 2016-09-30 13F GIBRALTAR INDS COM 374689107 23,710 9,428 66.01 881 95.78 0.0008
2016-08-12 2016-06-30 13F GIBRALTAR INDS COM 374689107 14,282 -14,230 -49.91 450 -44.85 0.0005
2016-05-13 2016-03-31 13F GIBRALTAR INDS COM 374689107 28,512 15,596 120.75 816 148.02 0.0009
2016-02-12 2015-12-31 13F GIBRALTAR INDS COM 374689107 12,916 736 6.04 329 47.53 0.0003
2015-11-13 2015-09-30 13F GIBRALTAR INDS COM 374689107 12,180 4,766 64.28 223 47.68 0.0002
2015-08-13 2015-06-30 13F GIBRALTAR INDS COM 374689107 7,414 -4,643 -38.51 151 -23.74 0.0001
2015-05-14 2015-03-31 13F GIBRALTAR INDS COM 374689107 12,057 -19,777 -62.13 198 -61.78 0.0002
2015-02-17 2014-12-31 13F GIBRALTAR INDS COM 374689107 31,834 18,921 146.53 518 192.66 0.0005
2014-11-14 2014-09-30 13F GIBRALTAR INDS COM 374689107 12,913 2,400 22.83 177 9.26 0.0002
2014-08-14 2014-06-30 13F GIBRALTAR INDS COM 374689107 10,513 -6,109 -36.75 162 -48.24 0.0002
2014-05-15 2014-03-31 13F GIBRALTAR INDS COM 374689107 16,622 -5,549 -25.03 313 -24.03 0.0003
2014-02-14 2013-12-31 13F GIBRALTAR INDS COM 374689107 22,171 12,376 126.35 412 196.40 0.0004
2013-11-14 2013-09-30 13F GIBRALTAR INDS COM 374689107 9,795 -7,767 -44.23 139 -45.70 0.0001
2013-08-14 2013-06-30 13F GIBRALTAR INDS COM 374689107 17,562 17,562 256 0.0003
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.