Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionAdvisor OS, LLC
Latest Disclosed Ownership16,440 shares
Latest Disclosed Value $ 1,179,785
Advisor OS, LLC reports 1.75% increase in ownership of LNT / Alliant Energy Corporation

On May 7, 2026 - Advisor OS, LLC filed a 13F-HR form disclosing ownership of 16,440 shares of Alliant Energy Corporation (US:LNT) valued at $1,179,734 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 16,157 shares of Alliant Energy Corporation. This represents a change in shares of 1.75% during the quarter. The current value of the position is $1,163,788 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)
2026-05-07 2026-03-31 13F ALLIANT ENERGY COM 018802108 16,440 283 1.75 1,180 12.29 0.0332
2026-02-04 2025-12-31 13F ALLIANT ENERGY COM 018802108 16,157 -485 -2.91 1,050 -6.33 0.0310
2025-11-12 2025-09-30 13F ALLIANT ENERGY COM 018802108 16,642 227 1.38 1,122 13.00 0.0968
2025-08-14 2025-06-30 13F ALLIANT ENERGY COM 018802108 16,415 1,711 11.64 993 4.86 0.0977
2025-05-06 2025-03-31 13F ALLIANT ENERGY COM 018802108 14,704 -535 -3.51 946 4.99 0.1077
2025-02-05 2024-12-31 13F ALLIANT ENERGY COM 018802108 15,239 2,149 16.42 901 13.48 0.1044
2024-11-04 2024-09-30 13F ALLIANT ENERGY COM 018802108 13,090 138 1.07 794 20.49 0.0791
2024-08-05 2024-06-30 13F ALLIANT ENERGY COM 018802108 12,952 4,255 48.92 659 50.46 0.0722
2024-05-09 2024-03-31 13F ALLIANT ENERGY COM 018802108 8,697 4,746 120.12 438 116.83 0.0504
2024-02-08 2023-12-31 13F ALLIANT ENERGY COM 018802108 3,951 3,951 203 0.0264
2023-02-01 2022-12-31 13F ALLIANT ENERGY COM 018802108 0 -3,991 -100.00 0 -100.00
2022-11-04 2022-09-30 13F ALLIANT ENERGY COM 018802108 3,991 3,991 212 0.0639
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.