Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership269,328 shares
Latest Disclosed Value $ 19,327
Natixis Advisors, L.p. reports 10.65% increase in ownership of LNT / Alliant Energy Corporation

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 269,328 shares of Alliant Energy Corporation (US:LNT) valued at $19,326,977 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 243,413 shares of Alliant Energy Corporation. This represents a change in shares of 10.65% during the quarter. The current value of the position is $19,065,729 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F ALLIANT ENERGY COM 018802108 269,328 25,915 10.65 19 26.67 0.0269
2026-02-10 2025-12-31 13F ALLIANT ENERGY COM 018802108 243,413 -1,494 -0.61 16 -6.25 0.0224
2025-11-13 2025-09-30 13F ALLIANT ENERGY COM 018802108 244,907 -14,999 -5.77 17 6.67 0.0241
2025-08-13 2025-06-30 13F ALLIANT ENERGY COM 018802108 259,906 -45,618 -14.93 16 -21.05 0.0249
2025-05-08 2025-03-31 13F ALLIANT ENERGY COM 018802108 305,524 104,907 52.29 20 72.73 0.0363
2025-02-10 2024-12-31 13F ALLIANT ENERGY COM 018802108 200,617 4,299 2.19 12 0.00 0.0222
2024-11-06 2024-09-30 13F ALLIANT ENERGY COM 018802108 196,318 25,161 14.70 12 37.50 0.0232
2024-08-01 2024-06-30 13F ALLIANT ENERGY COM 018802108 171,157 14,893 9.53 9 14.29 0.0189
2024-04-25 2024-03-31 13F ALLIANT ENERGY COM 018802108 156,264 -72,993 -31.84 8 -36.36 0.0181
2024-02-06 2023-12-31 13F ALLIANT ENERGY COM 018802108 229,257 -20,251 -8.12 12 -8.33 0.0310
2023-11-13 2023-09-30 13F ALLIANT ENERGY COM 018802108 249,508 47,156 23.30 12 20.00 0.0370
2023-08-15 2023-06-30 13F ALLIANT ENERGY COM 018802108 202,352 22,862 12.74 11 11.11 0.0328
2023-05-11 2023-03-31 13F ALLIANT ENERGY COM 018802108 179,490 16,425 10.07 10 0.00 0.0330
2023-01-27 2022-12-31 13F ALLIANT ENERGY COM 018802108 163,065 -56,394 -25.70 9 -99.92 0.0340
2022-11-14 2022-09-30 13F ALLIANT ENERGY COM 018802108 219,459 -5,199 -2.31 11,629 -11.69 0.0492
2022-08-12 2022-06-30 13F ALLIANT ENERGY COM 018802108 224,658 8,700 4.03 13,168 -2.41 0.0579
2022-05-12 2022-03-31 13F ALLIANT ENERGY COM 018802108 215,958 37,061 20.72 13,493 22.71 0.0515
2022-02-08 2021-12-31 13F ALLIANT ENERGY COM 018802108 178,897 22,040 14.05 10,996 25.22 0.0420
2021-11-15 2021-09-30 13F ALLIANT ENERGY COM 018802108 156,857 1,797 1.16 8,781 1.56 0.0361
2021-08-12 2021-06-30 13F ALLIANT ENERGY COM 018802108 155,060 3,516 2.32 8,646 5.36 0.0404
2021-05-05 2021-03-31 13F ALLIANT ENERGY COM 018802108 151,544 28,412 23.07 8,206 29.33 0.0428
2021-02-12 2020-12-31 13F ALLIANT ENERGY COM 018802108 123,132 -8,241 -6.27 6,345 -6.48 0.0366
2020-11-12 2020-09-30 13F ALLIANT ENERGY COM 018802108 131,373 6,646 5.33 6,785 13.71 0.0427
2020-08-11 2020-06-30 13F ALLIANT ENERGY COR COM 018802108 124,727 25,756 26.02 5,967 24.83 0.0396
2020-04-27 2020-03-31 13F ALLIANT ENERGY COR COM 018802108 98,971 39,410 66.17 4,780 46.67 0.0390
2020-02-10 2019-12-31 13F ALLIANT ENERGY COM 018802108 59,561 23,355 64.51 3,259 66.87 0.0230
2019-11-12 2019-09-30 13F ALLIANT ENERGY CL A 018802108 36,206 4,163 12.99 1,953 24.16 0.0155
2019-08-12 2019-06-30 13F ALLIANT ENERGY COM 018802108 32,043 5,807 22.13 1,573 27.16 0.0128
2019-05-15 2019-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 26,236 -171 -0.65 1,237 10.84 0.0108
2019-05-15 2019-03-31 13F ALLIANT ENERGY COM 018802108 26,236 -171 1,237
2019-02-13 2018-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 26,407 2,893 12.30 1,116 11.49 0.0110
2019-02-13 2018-12-31 13F ALLIANT ENERGY COM 018802108 26,407 2,893 1,116
2018-11-13 2018-09-30 13F ALLIANT ENERGY COM 018802108 23,514 618 2.70 1,001 3.30 0.0088
2018-08-14 2018-06-30 13F/A-1 ALLIANT ENERGY CORP COM COM 018802108 22,896 4,675 25.66 969 30.07 0.0093
2018-08-14 2018-06-30 13F ALLIANT ENERGY CORP COM COM 018802108 22,896 969
2018-05-10 2018-03-31 13F ALLIANT ENERGY COM 018802108 18,221 18,221 745 0.0074
2016-02-12 2015-12-31 13F ALLIANT ENERGY COM 018802108 0 0 0 0.0000
2015-11-12 2015-09-30 13F ALLIANT ENERGY COM 018802108 0 0 0 0.0000
2014-11-03 2014-09-30 13F ALLIANT ENERGY COM 018802108 0 -7,222 -100.00 0 -100.00
2014-08-13 2014-06-30 13F ALLIANT ENERGY COM 018802108 7,222 163 2.31 440 9.73 0.0063
2014-05-13 2014-03-31 13F ALLIANT ENERGY COM 018802108 7,059 -165 -2.28 401 7.51 0.0062
2014-02-12 2013-12-31 13F ALLIANT ENERGY COM 018802108 7,224 418 6.14 373 10.68 0.0061
2013-10-30 2013-09-30 13F ALLIANT ENERGY COM 018802108 6,806 -258 -3.65 337 -5.34 0.0062
2013-07-19 2013-06-30 13F ALLIANT ENERGY COM 018802108 7,064 7,064 356 0.0071
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.