Alliant Energy Corporation
US ˙ NasdaqGS ˙ US0188021085

SecurityLNT / Alliant Energy Corporation
InstitutionUBS Group AG
Latest Disclosed Ownership1,099,341 shares
Latest Disclosed Value $ 78,888,710
UBS Group AG ownership in LNT / Alliant Energy Corporation

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 1,099,341 shares of Alliant Energy Corporation (US:LNT) valued at $78,888,710 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 1,150,399 shares of Alliant Energy Corporation. This represents a change in shares of -4.44% during the quarter. The current value of the position is $77,822,349 USD.

UBS Group AG has a history of taking positions in derivatives of the underlying security (LNT) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

LNT / Alliant Energy Corporation Historical Put/Call Ratio
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)
2026-05-05 2026-03-31 13F ALLIANT ENERGY COM 018802108 1,099,341 -51,058 -4.44 78,889 5.48 0.0118
2026-01-29 2025-12-31 13F ALLIANT ENERGY COM 018802108 1,150,399 368,493 47.13 74,787 41.89 0.0121
2025-11-13 2025-09-30 13F ALLIANT ENERGY COM 018802108 781,906 -135,911 -14.81 52,708 -5.03 0.0083
2025-08-14 2025-06-30 13F ALLIANT ENERGY COM 018802108 917,817 -390,906 -29.87 55,500 -34.10 0.0096
2025-05-13 2025-03-31 13F ALLIANT ENERGY COM 018802108 1,308,723 -91,157 -6.51 84,216 1.72 0.0155
2025-02-14 2024-12-31 13F ALLIANT ENERGY COM 018802108 1,399,880 687,264 96.44 82,789 91.43 0.0153
2024-11-14 2024-09-30 13F ALLIANT ENERGY COM 018802108 712,616 147,530 26.11 43,249 50.37 0.0094
2024-08-14 2024-06-30 13F ALLIANT ENERGY COM 018802108 565,086 172,663 44.00 28,763 45.42 0.0071
2024-05-13 2024-03-31 13F ALLIANT ENERGY COM 018802108 392,423 -405,135 -50.80 19,778 -51.66 0.0049
2024-02-09 2023-12-31 13F ALLIANT ENERGY COM 018802108 797,558 153,963 23.92 40,915 31.21 0.0122
2023-11-09 2023-09-30 13F ALLIANT ENERGY COM 018802108 643,595 -12,637 -1.93 31,182 -9.46 0.0107
2023-08-11 2023-06-30 13F ALLIANT ENERGY COM 018802108 656,232 346,937 112.17 34,439 108.52 0.0116
2023-05-12 2023-03-31 13F ALLIANT ENERGY COM 018802108 309,295 16,670 5.70 16,516 2.23 0.0060
2023-02-08 2022-12-31 13F ALLIANT ENERGY COM 018802108 292,625 158,833 118.72 16,156 127.89 0.0060
2022-11-10 2022-09-30 13F ALLIANT ENERGY COM 018802108 133,792 3,525 2.71 7,089 -7.15 0.0031
2022-08-10 2022-06-30 13F ALLIANT ENERGY COM 018802108 130,267 -40,990 -23.93 7,635 -28.64 0.0031
2022-05-16 2022-03-31 13F ALLIANT ENERGY COM 018802108 171,257 -124,214 -42.04 10,700 -41.09 0.0036
2022-02-14 2021-12-31 13F ALLIANT ENERGY COM 018802108 295,471 51,202 20.96 18,163 32.83 0.0052
2021-11-15 2021-09-30 13F ALLIANT ENERGY COM 018802108 244,269 101,041 70.55 13,674 71.22 0.0043
2021-08-13 2021-06-30 13F ALLIANT ENERGY COM 018802108 143,228 -124,040 -46.41 7,986 -44.83 0.0026
2021-05-12 2021-03-31 13F ALLIANT ENERGY COM 018802108 267,268 -13,256 -4.73 14,474 0.12 0.0048
2021-02-11 2020-12-31 13F ALLIANT ENERGY COM 018802108 280,524 42,252 17.73 14,456 17.47 0.0049
2020-11-12 2020-09-30 13F ALLIANT ENERGY COM 018802108 238,272 75,730 46.59 12,306 58.28 0.0046
2020-07-31 2020-06-30 13F ALLIANT ENERGY COM 018802108 162,542 -12,159 -6.96 7,775 -7.85 0.0033
2020-05-01 2020-03-31 13F ALLIANT ENERGY COM 018802108 174,701 -135,084 -43.61 8,437 -50.23 0.0040
2020-02-14 2019-12-31 13F ALLIANT ENERGY COM 018802108 309,785 53,544 20.90 16,952 22.67 0.0059
2019-11-14 2019-09-30 13F ALLIANT ENERGY COM 018802108 256,241 -180,126 -41.28 13,819 -35.47 0.0053
2019-08-14 2019-06-30 13F ALLIANT ENERGY COM 018802108 436,367 259,062 146.11 21,416 156.26 0.0082
2019-05-14 2019-03-31 13F ALLIANT ENERGY COM 018802108 177,305 -5,714 -3.12 8,357 8.07 0.0035
2019-02-14 2018-12-31 13F ALLIANT ENERGY COM 018802108 183,019 -68,581 -27.26 7,733 -27.80 0.0035
2018-11-14 2018-09-30 13F ALLIANT ENERGY COM 018802108 251,600 92,134 57.78 10,711 58.70 0.0042
2018-08-14 2018-06-30 13F ALLIANT ENERGY COM 018802108 159,466 -22,003 -12.12 6,749 -8.98 0.0029
2018-05-15 2018-03-31 13F ALLIANT ENERGY COM 018802108 181,469 -37,165 -17.00 7,415 -20.40 0.0032
2018-02-14 2017-12-31 13F ALLIANT ENERGY COM 018802108 218,634 -32,202 -12.84 9,315 -10.66 0.0038
2017-11-14 2017-09-30 13F ALLIANT ENERGY COM 018802108 250,836 31,745 14.49 10,427 18.48 0.0048
2017-11-14 2017-06-30 13F/A-1 ALLIANT ENERGY COM 018802108 219,091 13,641 6.64 8,801 8.15 0.0046
2017-08-14 2017-06-30 13F ALLIANT ENERGY COM 018802108 219,091 13,641 8,801
2017-11-14 2017-03-31 13F/A-1 ALLIANT ENERGY COM 018802108 205,450 10,482 5.38 8,138 10.17 0.0044
2017-05-12 2017-03-31 13F ALLIANT ENERGY COM 018802108 205,450 10,482 8,138
2017-02-14 2016-12-31 13F ALLIANT ENERGY COM 018802108 194,968 -22,348 -10.28 7,387 -11.27 0.0041
2016-11-14 2016-09-30 13F ALLIANT ENERGY COM 018802108 217,316 51,428 31.00 8,325 26.42 0.0050
2016-08-12 2016-06-30 13F ALLIANT ENERGY COM 018802108 165,888 65,718 65.61 6,585 -11.50 0.0041
2016-05-12 2016-03-31 13F ALLIANT ENERGY COM 018802108 100,170 9,399 10.35 7,441 31.28 0.0050
2016-02-16 2015-12-31 13F ALLIANT ENERGY COM 018802108 90,771 1,042 1.16 5,668 7.98 0.0037
2015-11-13 2015-09-30 13F ALLIANT ENERGY COM 018802108 89,729 -16,619 -15.63 5,249 -14.48 0.0037
2015-08-14 2015-06-30 13F ALLIANT ENERGY COM 018802108 106,348 -11,161 -9.50 6,138 -17.09 0.0041
2015-05-14 2015-03-31 13F ALLIANT ENERGY COM 018802108 117,509 793 0.68 7,403 -4.50 0.0051
2015-02-17 2014-12-31 13F ALLIANT ENERGY COM 018802108 116,716 116,716 7,752 0.0054
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-13 2025-09-30 13F ALLIANT ENERGY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F ALLIANT ENERGY COM Call 479,400 0.19 28,989 -5.85 n/a n/a n/a
2025-05-13 2025-03-31 13F ALLIANT ENERGY COM Call 478,500 30,791 n/a n/a n/a
2023-02-08 2022-12-31 13F ALLIANT ENERGY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-10 2022-09-30 13F ALLIANT ENERGY COM Call 169,100 8,961 n/a n/a n/a
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.