First Interstate BancSystem, Inc.
US ˙ NasdaqGS ˙ US32055Y2019

SecurityFIBK / First Interstate BancSystem, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership5,210,135 shares
Ownership 5.00%
Fmr Llc ownership in FIBK / First Interstate BancSystem, Inc.

2025-08-06 - Fmr Llc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 5,210,135 shares of First Interstate BancSystem, Inc. (US:FIBK). This represents 5.0 percent ownership of the company. In their previous filing dated 2025-02-12 , Fmr Llc had reported owning 6,786,334 shares, indicating a decrease of -23.23 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-08-06 2025-08-06 13G/A 6,786,334 5,210,135 -23.23 5.00 -23.08
2025-02-12 2025-02-12 13G 5,008,064 6,786,334 35.51 6.50 35.70
2024-11-12 2024-11-12 13G/A 6,605,392 5,008,064 -24.18 4.79 -23.85
2024-02-09 2024-02-09 13G 1,251 6,605,392 527,908.95 6.29 89,757.14
2013-07-10 2013-07-10 13G/A 1,251 0.01
2013-02-14 2013-02-14 13G/A 1,335,343 7.85
2012-02-14 2012-02-14 13G 1,021,080 6.25

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 FIRST INTST BANCSYSTEM COM 32055Y201 3,877,196 -859,495 -18.15 129,498 -20.98 0.0014
2026-02-17 2025-12-31 13F FIRST INTST BANCSYSTEM COM 32055Y201 4,736,691 -137,105 -2.81 163,890 5.51 0.0084
2025-11-13 2025-09-30 13F FIRST INTST BANCSYSTEM COM 32055Y201 4,873,796 -336,340 -6.46 155,328 3.44 0.0081
2025-08-14 2025-06-30 13F FIRST INTST BANCSYSTEM COM 32055Y201 5,210,136 -1,564,869 -23.10 150,156 -22.64 0.0085
2025-05-12 2025-03-31 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,775,005 -11,329 -0.17 194,104 -11.91 0.0124
2025-02-13 2024-12-31 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,786,334 1,778,269 35.51 220,352 43.41 0.0132
2024-11-13 2024-09-30 13F FIRST INTST BANCSYSTEM COM 32055Y201 5,008,065 -1,983,591 -28.37 153,647 -20.86 0.0093
2024-08-13 2024-06-30 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,991,656 565,186 8.79 194,158 11.03 0.0124
2024-05-13 2024-03-31 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,426,470 -178,923 -2.71 174,864 -13.91 0.0117
2024-02-13 2023-12-31 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,605,393 153,635 2.38 203,116 26.23 0.0156
2023-11-13 2023-09-30 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,451,758 28,343 0.44 160,907 5.08 0.0139
2023-08-11 2023-06-30 13F FIRST INTST BANCSYSTEM COM 32055Y201 6,423,415 1,113,881 20.98 153,134 -3.41 0.0128
2023-08-11 2023-03-31 13F/A-1 FIRST INTST BANCSYSTEM COM CL A 32055Y201 5,309,534 1,202,737 29.29 158,543 -0.12 0.0145
2023-05-11 2023-03-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 5,309,534 1,202,737 158,543 0.0145
2023-02-13 2022-12-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 4,106,797 341,645 9.07 158,728 4.48 0.0158
2022-11-10 2022-09-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 3,765,152 200,510 5.62 151,923 11.83 0.0158
2022-08-12 2022-06-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 3,564,642 2,113,366 145.62 135,849 154.58 0.0135
2022-05-13 2022-03-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,451,276 516,199 55.20 53,363 40.32 0.0043
2022-02-14 2021-12-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 935,077 -13,800 -1.45 38,030 -0.45 0.0028
2022-02-14 2021-09-30 13F/A-1 FIRST INTST BANCSYSTEM COM CL A 32055Y201 948,877 127,600 15.54 38,202 11.20 0.0030
2021-11-15 2021-09-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 948,877 127,600 38,202 0.0006
2021-08-13 2021-06-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 821,277 -535,550 -39.47 34,354 -45.01 0.0027
2021-05-14 2021-03-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,356,827 -295,448 -17.88 62,468 -7.27 0.0053
2021-02-08 2020-12-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,652,275 -243,442 -12.84 67,364 11.57 0.0060
2020-11-13 2020-09-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,895,717 46,044 2.49 60,379 5.44 0.0061
2020-08-24 2020-06-30 13F/A-1 FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,849,673 985,843 114.12 57,266 129.86 0.0063
2020-08-13 2020-06-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,849,673 985,843 57,266 1,406.8580
2020-05-14 2020-03-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 863,830 -687,567 -44.32 24,913 -61.69 0.0034
2020-02-07 2019-12-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,551,397 -577,111 -27.11 65,034 -24.07 0.0072
2019-11-13 2019-09-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 2,128,508 147,043 7.42 85,651 9.13 0.0103
2019-08-13 2019-06-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,981,465 309,539 18.51 78,486 17.89 0.0092
2019-05-13 2019-03-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,671,926 331,263 24.71 66,576 35.83 0.0080
2019-02-13 2018-12-31 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 1,340,663 804,884 150.23 49,014 104.20 0.0067
2018-11-09 2018-09-30 13F FIRST INTST BANCSYSTEM COM CL A 32055Y201 535,779 535,779 24,003 0.0027
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.