| Form 5500, Schedule H, Par IV, Line 4i - Schedule of Assets [Held at End of Year] |
FORM 5500, SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
AS OF DECEMBER 31, 2025 | | | | | | | | | | | | | | | | | | | | | | Identity of issue, borrower, | | Description of investment including maturity date, | | | | | | lessor, or similar party | | rate of interest, collateral, par or maturity value | | Cost (a) | | Current Value | | Registered Investment Companies | | American Funds EuroPacific Growth Fund, 2,289,050 class R6 shares | | | | $ | 138,670,657 | | | | Dodge & Cox Stock Fund, 8,480,785 class X shares | | | | 140,696,231 | | | | Vanguard Short-Term Inflation-Protected Securities Index Fund, 158,904 Admiral shares | | | | 3,940,811 | | | | Fidelity Investments Money Market Government Portfolio (b), 2,455,324 class I shares | | | | 2,455,324 | | | Common/Collective Trusts | | State Street S&P 500 Index Securities Lending Series Fund, 11,259,783 class II shares | | | | 343,445,893 | | | | Winslow Large Cap Growth Fund, 1,190,219 class C shares | | | | 201,658,866 | | | | Northern Trust Collective Extended Equity Market Index Fund - Lending, 86,068 shares | | | | 125,013,455 | | | | BlackRock Total Return Bond Fund, 9,358,474 class L shares | | | | 106,882,055 | | | | State Street U.S. Bond Index Securities Lending Series Fund, 8,638,563 class XIV shares | | | | 99,689,013 | | | | JPMCB Intermediate Bond Fund (b), 2,590,938 shares | | | | 50,937,832 | | | | JPMCB Intermediate Income Bond Fund (b), 1,362,464 shares | | | | 17,017,170 | | | | State Street Global All Cap Equity Ex-U.S. Index Securities Lending Series Fund, 4,990,001 class II shares | | | | 92,649,356 | | | | Earnest Partners Smid Cap Core Fund, 2,016,268 class 1 shares | | | | 35,385,511 | | | Corporate Stocks: Common | | Alliant Energy Corporation Common Stock (b), 1,560,280 shares | | | | 101,433,825 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Participant-Directed Brokerage Accounts | | Self-Managed Brokerage Accounts (b) | | | | 20,884,590 | | | Participant Promissory Notes (b) | | Maximum allowable loans per participant - $50,000 | | | | | | | Various interest rates - 4.25% to 9.5% | | | | | | | Primarily maturing within 5 years | | | | 10,852,946 | | | | | | | | $1,491,613,535 | |
(a)Cost value is not required to be disclosed for participant-directed investments. (b)Represents party known to be a party-in-interest to the Alliant Energy Corporation 401(k) Savings Plan.
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