Vanguard Group Inc ownership in AY1 / Alliant Energy Corporation

Alliant Energy Corporation

DE ˙ DB ˙ US0188021085

€ 60,38 ↓ -0.15 (-0.25%)

2026-06-04
PREÇO DA AÇÃO

Security	DE:AY1 / Alliant Energy Corporation
Institution	Vanguard Group Inc
Latest Disclosed Ownership	32,094,212 shares
Ownership	12.58%

2024-02-13 - Vanguard Group Inc has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 32,094,212 shares of Alliant Energy Corporation (DE:AY1). This represents 12.58 percent ownership of the company. In their previous filing dated 2023-02-09 , Vanguard Group Inc had reported owning 32,798,266 shares, indicating a decrease of -2.15 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2024-02-13	2024-02-13	13G/A	32,798,266	32,094,212	-2.15	12.58	-3.75
2023-02-09	2023-02-09	13G/A	30,687,859	32,798,266	6.88	13.07	6.61
2022-02-09	2022-02-09	13G/A	29,984,210	30,687,859	2.35	12.26	2.08
2021-02-10	2021-02-10	13G/A	30,817,515	29,984,210	-2.70	12.01	-4.83
2020-02-11	2020-02-11	13G/A	26,589,237	30,817,515	15.90	12.62	16.10
2019-02-11	2019-02-11	13G/A	24,537,881	26,589,237	8.36	10.87	2.45
2018-02-12	2018-02-12	13G/A	22,890,250	24,537,881	7.20	10.61	5.57
2017-03-10	2017-03-10	13G/A	22,323,761	22,890,250	2.54	10.05	2.45
2017-02-09	2017-02-09	13G/A	8,155,455	22,323,761	173.73	9.81	36.44
2016-02-10	2016-02-10	13G/A		8,155,455		7.19
2015-02-11	2015-02-11	13G/A		7,055,313		6.35
2014-02-10	2014-02-10	13G		6,252,764		5.63

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-01-29	2025-12-31	13F	ALLIANT ENERGY	COM	018802108	33,785,294	383,612	1.15	2,196,382	-2.45	0.0318
2025-11-07	2025-09-30	13F	ALLIANT ENERGY	COM	018802108	33,401,682	97,980	0.29	2,251,607	11.80	0.0337
2025-08-11	2025-06-30	13F	ALLIANT ENERGY	COM	018802108	33,303,702	481,487	1.47	2,013,875	-4.65	0.0326
2025-05-09	2025-03-31	13F	ALLIANT ENERGY	COM	018802108	32,822,215	158,507	0.49	2,112,110	9.34	0.0382
2025-02-11	2024-12-31	13F	ALLIANT ENERGY	COM	018802108	32,663,708	226,275	0.70	1,931,732	-1.87	0.0336
2024-11-13	2024-09-30	13F	ALLIANT ENERGY	COM	018802108	32,437,433	202,367	0.63	1,968,628	19.98	0.0353
2024-08-13	2024-06-30	13F	ALLIANT ENERGY	COM	018802108	32,235,066	380,260	1.19	1,640,765	2.20	0.0315
2024-05-10	2024-03-31	13F	ALLIANT ENERGY	COM	018802108	31,854,806	-239,786	-0.75	1,605,482	-2.49	0.0318
2024-03-11	2023-12-31	13F/A-1	ALLIANT ENERGY	COM	018802108	32,094,592	-46,437	-0.14	1,646,453	5.73	0.0360
2024-02-14	2023-12-31	13F	ALLIANT ENERGY	COM	018802108	32,094,212	-46,817		1,646,433		0.0313
2023-12-18	2023-09-30	13F/A-1	ALLIANT ENERGY	COM	018802108	32,141,029	-59,057	-0.18	1,557,233	-7.85	0.0383
2023-11-14	2023-09-30	13F	ALLIANT ENERGY	COM	018802108	32,141,029	-59,057		1,557,233		0.0383
2023-08-14	2023-06-30	13F	ALLIANT ENERGY	COM	018802108	32,200,086	-313,425	-0.96	1,689,861	-2.67	0.0401
2023-07-14	2023-03-31	13F/A-1	ALLIANT ENERGY	COM	018802108	32,513,511	-284,755	-0.87	1,736,221	-4.12	0.0442
2023-05-15	2023-03-31	13F	ALLIANT ENERGY	COM	018802108	32,513,131	-285,135		1,736,201		0.0442
2023-02-10	2022-12-31	13F	ALLIANT ENERGY	COM	018802108	32,798,266	405,005	1.25	1,810,792	5.49	0.0493
2022-11-14	2022-09-30	13F	ALLIANT ENERGY	COM	018802108	32,393,261	754,571	2.38	1,716,519	-7.43	0.0505
2022-08-12	2022-06-30	13F	ALLIANT ENERGY	COM	018802108	31,638,690	608,491	1.96	1,854,344	-4.35	0.0521
2022-05-13	2022-03-31	13F	ALLIANT ENERGY	COM	018802108	31,030,199	342,340	1.12	1,938,766	2.78	0.0459
2022-02-14	2021-12-31	13F	ALLIANT ENERGY	COM	018802108	30,687,859	327,729	1.08	1,886,382	10.99	0.0428
2021-11-12	2021-09-30	13F	ALLIANT ENERGY	COM	018802108	30,360,130	282,890	0.94	1,699,561	1.34	0.0422
2021-08-13	2021-06-30	13F	ALLIANT ENERGY	COM	018802108	30,077,240	147,706	0.49	1,677,107	3.46	0.0417
2021-05-14	2021-03-31	13F	ALLIANT ENERGY	COM	018802108	29,929,534	-54,676	-0.18	1,620,984	4.91	0.0438
2021-02-12	2020-12-31	13F	ALLIANT ENERGY	COM	018802108	29,984,210	-356,540	-1.18	1,545,086	-1.40	0.0448
2020-11-16	2020-09-30	13F	ALLIANT ENERGY	COM	018802108	30,340,750	-793,877	-2.55	1,567,100	5.21	0.0519
2020-08-14	2020-06-30	13F	ALLIANT ENERGY	COM	018802108	31,134,627	-587,986	-1.85	1,489,481	-2.77	0.0528
2020-05-15	2020-03-31	13F	ALLIANT ENERGY	COM	018802108	31,722,613	905,098	2.94	1,531,887	-9.16	0.0653
2020-02-14	2019-12-31	13F	ALLIANT ENERGY	COM	018802108	30,817,515	771,341	2.57	1,686,335	4.07	0.0575
2019-11-14	2019-09-30	13F	ALLIANT ENERGY	COM	018802108	30,046,174	683,670	2.33	1,620,390	12.44	0.0601
2019-08-14	2019-06-30	13F	ALLIANT ENERGY	COM	018802108	29,362,504	7,848	0.03	1,441,111	4.17	0.0542
2019-05-15	2019-03-31	13F	ALLIANT ENERGY	COM	018802108	29,354,656	2,765,419	10.40	1,383,486	23.15	0.0543
2019-02-14	2018-12-31	13F	ALLIANT ENERGY	COM	018802108	26,589,237	790,038	3.06	1,123,396	2.29	0.0505
2018-12-13	2018-09-30	13F/A-2	ALLIANT ENERGY	COM	018802108	25,799,199	833,075	3.34	1,098,272	3.95	0.0429
2018-11-23	2018-09-30	13F/A-1	ALLIANT ENERGY	COM	018802108	25,799,199	0		1,098,272		0.0429
2018-11-14	2018-09-30	13F	ALLIANT ENERGY	COM	018802108	25,799,199	833,075		1,098,272
2018-08-14	2018-06-30	13F	ALLIANT ENERGY	COM	018802108	24,966,124	279,999	1.13	1,056,567	4.75	0.0442
2018-05-15	2018-03-31	13F	ALLIANT ENERGY	COM	018802108	24,686,125	148,244	0.60	1,008,676	-3.53	0.0441
2018-02-14	2017-12-31	13F	ALLIANT ENERGY	COM	018802108	24,537,881	239,226	0.98	1,045,560	3.51	0.0457
2017-11-14	2017-09-30	13F	ALLIANT ENERGY	COM	018802108	24,298,655	623,634	2.63	1,010,096	6.21	0.0472
2017-08-24	2017-06-30	13F/A-1	ALLIANT ENERGY	COM	018802108	23,675,021	580,804	2.51	951,025	3.96	0.0468
2017-08-11	2017-06-30	13F	ALLIANT ENERGY	COM	018802108	23,675,021	580,804		951,025
2017-05-12	2017-03-31	13F	ALLIANT ENERGY	COM	018802108	23,094,217	770,456	3.45	914,762	8.15	0.0470
2017-02-14	2016-12-31	13F	ALLIANT ENERGY	COM	018802108	22,323,761	609,566	2.81	845,846	1.68	0.0472
2016-11-14	2016-09-30	13F	ALLIANT ENERGY	COM	018802108	21,714,195	1,715,183	8.58	831,872	4.77	0.0489
2016-08-10	2016-06-30	13F	ALLIANT ENERGY	COM	018802108	19,999,012	11,363,093	131.58	793,961	23.77	0.0493
2016-05-13	2016-03-31	13F	ALLIANT ENERGY	COM	018802108	8,635,919	480,464	5.89	641,476	25.95	0.0416
2016-02-08	2015-12-31	13F	ALLIANT ENERGY	COM	018802108	8,155,455	267,576	3.39	509,308	10.39	0.0342
2015-11-12	2015-09-30	13F/A-1	ALLIANT ENERGY	COM	018802108	7,887,879	108,110	1.39	461,363	2.74	0.0196
2015-11-12	2015-09-30	13F/A-1	ALLIANT ENERGY	COM	018802108	7,887,879	108,110		461,363		0.0196
2015-11-12	2015-09-30	13F	ALLIANT ENERGY	COM	018802108	19,510,193			922,710
2015-08-13	2015-06-30	13F	ALLIANT ENERGY	COM	018802108	7,779,769	308,855	4.13	449,047	-4.59	0.0304
2015-05-15	2015-03-31	13F/A-1	ALLIANT ENERGY	COM	018802108	7,470,914	415,601	5.89	470,668	0.44	0.0319
2015-05-14	2015-03-31	13F	ALLIANT ENERGY	COM	018802108	7,470,914			470,668
2015-02-12	2014-12-31	13F	ALLIANT ENERGY	COM	018802108	7,055,313	178,744	2.60	468,614	22.99	0.0338
2014-11-12	2014-09-30	13F	ALLIANT ENERGY	COM	018802108	6,876,569	120,307	1.78	381,031	-7.33	0.0297
2014-08-11	2014-06-30	13F	ALLIANT ENERGY	COM	018802108	6,756,262	264,889	4.08	411,186	11.50	0.0324
2014-05-13	2014-03-31	13F	ALLIANT ENERGY	COM	018802108	6,491,373	238,609	3.82	368,775	14.30	0.0310
2014-02-12	2013-12-31	13F	ALLIANT ENERGY	COM	018802108	6,252,764	211,401	3.50	322,642	7.78	0.0284
2013-11-07	2013-09-30	13F	ALLIANT ENERGY	COM	018802108	6,041,363	93,370	1.57	299,350	-0.18	0.0292
2013-08-13	2013-06-30	13F	ALLIANT ENERGY	COM	018802108	5,947,993	5,947,993		299,898		0.0315

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.