Alliant Energy Corporation
DE ˙ DB ˙ US0188021085
60,38 € ↓ -0,15 (-0,25%)
2026-06-04
AKTIENPREIS
SecurityDE:AY1 / Alliant Energy Corporation
InstitutionNorthern Trust Corp
Latest Disclosed Ownership2,212,362 shares
Latest Disclosed Value $ 158,759,097
Northern Trust Corp reports 3.15% increase in ownership of AY1 / Alliant Energy Corporation

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 2,212,362 shares of Alliant Energy Corporation (DE:AY1) valued at $138,272,625 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,144,834 shares of Alliant Energy Corporation. This represents a change in shares of 3.15% during the quarter. The current value of the position is $133,582,418 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)
2026-05-14 2026-03-31 13F ALLIANT ENERGY COM 018802108 2,212,362 67,528 3.15 158,759 13.86 0.0210
2026-02-17 2025-12-31 13F ALLIANT ENERGY COM 018802108 2,144,834 -58,532 -2.66 139,436 -6.12 0.0178
2025-11-14 2025-09-30 13F ALLIANT ENERGY COM 018802108 2,203,366 -110,937 -4.79 148,529 6.13 0.0190
2025-08-13 2025-06-30 13F ALLIANT ENERGY COM 018802108 2,314,303 -128,711 -5.27 139,946 -10.98 0.0192
2025-05-13 2025-03-31 13F ALLIANT ENERGY COM 018802108 2,443,014 30,608 1.27 157,208 10.19 0.0233
2025-02-14 2024-12-31 13F ALLIANT ENERGY COM 018802108 2,412,406 177,129 7.92 142,670 5.17 0.0202
2024-11-13 2024-09-30 13F ALLIANT ENERGY COM 018802108 2,235,277 -129,922 -5.49 135,659 12.68 0.0222
2024-08-14 2024-06-30 13F ALLIANT ENERGY COM 018802108 2,365,199 76,319 3.33 120,389 4.36 0.0203
2024-05-14 2024-03-31 13F ALLIANT ENERGY COM 018802108 2,288,880 -202,250 -8.12 115,360 -9.73 0.0199
2024-02-13 2023-12-31 13F ALLIANT ENERGY COM 018802108 2,491,130 55,131 2.26 127,795 8.28 0.0231
2023-11-13 2023-09-30 13F ALLIANT ENERGY COM 018802108 2,435,999 -33,645 -1.36 118,024 -8.94 0.0229
2023-08-11 2023-06-30 13F ALLIANT ENERGY COM 018802108 2,469,644 -170,100 -6.44 129,607 -8.06 0.0249
2023-05-15 2023-03-31 13F ALLIANT ENERGY COM 018802108 2,639,744 -7,040 -0.27 140,962 -3.54 0.0279
2023-02-13 2022-12-31 13F ALLIANT ENERGY COM 018802108 2,646,784 40,122 1.54 146,129 5.79 0.0307
2022-11-14 2022-09-30 13F ALLIANT ENERGY COM 018802108 2,606,662 885 0.03 138,127 -9.56 0.0316
2022-08-12 2022-06-30 13F ALLIANT ENERGY COM 018802108 2,605,777 -31,212 -1.18 152,726 -7.30 0.0327
2022-05-13 2022-03-31 13F ALLIANT ENERGY COM 018802108 2,636,989 -73,373 -2.71 164,760 -1.11 0.0290
2022-02-08 2021-12-31 13F ALLIANT ENERGY COM 018802108 2,710,362 58,764 2.22 166,606 12.24 0.0273
2021-11-15 2021-09-30 13F ALLIANT ENERGY COM 018802108 2,651,598 53,997 2.08 148,437 2.48 0.0263
2021-08-13 2021-06-30 13F ALLIANT ENERGY COM 018802108 2,597,601 -19,875 -0.76 144,843 2.17 0.0255
2021-05-12 2021-03-31 13F ALLIANT ENERGY COM 018802108 2,617,476 -47,460 -1.78 141,763 3.23 0.0264
2021-02-11 2020-12-31 13F ALLIANT ENERGY COM 018802108 2,664,936 -79,983 -2.91 137,325 -3.14 0.0267
2020-11-16 2020-09-30 13F ALLIANT ENERGY COM 018802108 2,744,919 -29,474 -1.06 141,775 6.82 0.0311
2020-08-14 2020-06-30 13F ALLIANT ENERGY COM 018802108 2,774,393 66,004 2.44 132,727 1.48 0.0314
2020-05-14 2020-03-31 13F ALLIANT ENERGY COM 018802108 2,708,389 19,028 0.71 130,788 -11.13 0.0375
2020-02-14 2019-12-31 13F ALLIANT ENERGY COM 018802108 2,689,361 -115,999 -4.13 147,162 -2.73 0.0329
2019-11-13 2019-09-30 13F ALLIANT ENERGY COM 018802108 2,805,360 -173,933 -5.84 151,293 3.47 0.0362
2019-08-13 2019-06-30 13F ALLIANT ENERGY COM 018802108 2,979,293 -19,597 -0.65 146,225 3.46 0.0347
2019-05-13 2019-03-31 13F ALLIANT ENERGY COM 018802108 2,998,890 69,116 2.36 141,338 14.18 0.0349
2019-02-12 2018-12-31 13F ALLIANT ENERGY COM 018802108 2,929,774 115,939 4.12 123,783 3.34 0.0347
2018-11-14 2018-09-30 13F ALLIANT ENERGY COM 018802108 2,813,835 74,082 2.70 119,785 3.31 0.0293
2018-09-18 2018-06-30 13F/A-1 ALLIANT ENERGY COM 018802108 2,739,753 2,051 0.07 115,945 3.65 0.0294
2018-08-14 2018-06-30 13F ALLIANT ENERGY COM 018802108 2,754,840 17,138 116,584
2018-05-09 2018-03-31 13F ALLIANT ENERGY COM 018802108 2,737,702 -31,881 -1.15 111,862 -5.21 0.0291
2018-02-14 2017-12-31 13F ALLIANT ENERGY COM 018802108 2,769,583 79,363 2.95 118,012 5.53 0.0299
2017-11-13 2017-09-30 13F ALLIANT ENERGY COM 018802108 2,690,220 190,370 7.62 111,832 11.37 0.0291
2017-08-11 2017-06-30 13F ALLIANT ENERGY COM 018802108 2,499,850 -39,258 -1.55 100,418 -0.16 0.0281
2017-05-12 2017-03-31 13F ALLIANT ENERGY COM 018802108 2,539,108 -356,019 -12.30 100,574 -8.32 0.0290
2017-02-13 2016-12-31 13F ALLIANT ENERGY COM 018802108 2,895,127 -33,732 -1.15 109,696 -2.24 0.0336
2016-11-09 2016-09-30 13F ALLIANT ENERGY COM 018802108 2,928,859 -88,744 -2.94 112,205 -6.34 0.0349
2016-08-12 2016-06-30 13F ALLIANT ENERGY COM 018802108 3,017,603 1,762,763 140.48 119,798 30.29 0.0389
2016-08-19 2016-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 1,254,840 41,648 3.43 91,950 21.36 0.0305
2016-05-13 2016-03-31 13F Alliant COMM 018802108 1,254,834 93,209
2016-02-12 2015-12-31 13F Alliant COMM 018802108 1,213,192 -87,193 -6.71 75,764 -0.39 0.0251
2015-11-12 2015-09-30 13F ALLIANT ENERGY COM 018802108 1,300,385 53,194 4.27 76,059 5.66 0.0254
2015-08-13 2015-06-30 13F ALLIANT ENERGY COM 018802108 1,247,191 -38,669 -3.01 71,988 -11.14 0.0488
2015-05-14 2015-03-31 13F Alliant COMM 018802108 1,285,860 -20,850 -1.60 81,009 -6.66 0.0244
2015-02-12 2014-12-31 13F Alliant COM 018802108 1,306,710 191,518 17.17 86,793 40.46 0.0262
2014-11-13 2014-09-30 13F Alliant COMM 018802108 1,115,192 43,314 4.04 61,793 -5.27 0.0194
2014-08-14 2014-06-30 13F ALLIANT ENERGY COM 018802108 1,071,878 804 0.08 65,234 7.21 0.0203
2014-05-14 2014-03-31 13F ALLIANT ENERGY COM 018802108 1,071,074 -81,970 -7.11 60,847 2.27 0.0191
2014-02-21 2013-12-31 13F/A-1 ALLIANT ENERGY COM 018802108 1,153,044 20,922 1.85 59,497 6.06 0.0191
2014-02-12 2013-12-31 13F ALLIANT ENERGY COM 018802108 1,153,044 59,497
2013-11-13 2013-09-30 13F ALLIANT ENERGY COM 018802108 1,132,122 -6,981 -0.61 56,096 -2.33 0.0198
2013-08-09 2013-06-30 13F ALLIANT ENERGY COM 018802108 1,139,103 1,139,103 57,434 0.0208
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.