State Street Corp ownership in AY1 / Alliant Energy Corporation

Alliant Energy Corporation

DE ˙ DB ˙ US0188021085

60,38 € ↓ -0,15 (-0,25%)

2026-06-04
AKTIENPREIS

Security	DE:AY1 / Alliant Energy Corporation
Institution	State Street Corp
Latest Disclosed Ownership	16,243,234 shares
Ownership	6.30%

2024-10-16 - State Street Corp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 16,243,234 shares of Alliant Energy Corporation (DE:AY1). This represents 6.3 percent ownership of the company. In their previous filing dated 2024-01-30 , State Street Corp had reported owning 13,410,618 shares, indicating an increase of 21.12 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)
2024-10-16	2024-10-16	13G/A	13,410,618	16,243,234	21.12	6.30	18.64
2024-01-30	2024-01-30	13G/A	14,012,417	13,410,618	-4.29	5.31	-4.84
2023-02-08	2023-02-08	13G/A	12,696,757	14,012,417	10.36	5.58	10.06
2022-02-10	2022-02-10	13G/A	12,539,059	12,696,757	1.26	5.07	1.00
2021-02-05	2021-02-05	13G	13,085,033	12,539,059	-4.17	5.02	-6.34
2020-02-13	2020-02-13	13G	11,851,086	13,085,033	10.41	5.36	11.67
2019-02-13	2019-02-13	13G/A	11,770,647	11,851,086	0.68	4.80	-5.70
2018-02-13	2018-02-13	13G	12,054,898	11,770,647	-2.36	5.09	-3.96
2017-02-09	2017-02-09	13G		12,054,898		5.30

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 (%)
2026-05-15	2026-03-31	13F	ALLIANT ENERGY	COM	018802108	17,010,651	129,034	0.76	1,220,684	11.23	0.0421
2026-02-13	2025-12-31	13F	ALLIANT ENERGY	COM	018802108	16,881,617	386,060	2.34	1,097,474	-1.30	0.0368
2025-11-14	2025-09-30	13F	ALLIANT ENERGY	COM	018802108	16,495,557	-238,881	-1.43	1,111,965	9.89	0.0386
2025-08-14	2025-06-30	13F	ALLIANT ENERGY	COM	018802108	16,734,438	350,597	2.14	1,011,931	-4.02	0.0379
2025-05-15	2025-03-31	13F	ALLIANT ENERGY	COM	018802108	16,383,841	11,717	0.07	1,054,300	8.89	0.0434
2025-02-14	2024-12-31	13F	ALLIANT ENERGY	COM	018802108	16,372,124	130,046	0.80	968,249	-1.77	0.0382
2024-11-14	2024-09-30	13F	ALLIANT ENERGY	COM	018802108	16,242,078	137,767	0.86	985,732	20.25	0.0401
2024-08-14	2024-06-30	13F	ALLIANT ENERGY	COM	018802108	16,104,311	-551,460	-3.31	819,709	-2.35	0.0358
2024-05-15	2024-03-31	13F	ALLIANT ENERGY	COM	018802108	16,655,771	3,297,436	24.68	839,451	22.50	0.0375
2024-02-14	2023-12-31	13F	ALLIANT ENERGY	COM	018802108	13,358,335	361,988	2.79	685,283	8.83	0.0333
2023-11-14	2023-09-30	13F	ALLIANT ENERGY	COM	018802108	12,996,347	-512,735	-3.80	629,673	-11.18	0.0349
2023-08-14	2023-06-30	13F	ALLIANT ENERGY	COM	018802108	13,509,082	109,916	0.82	708,957	-0.92	0.0372
2023-05-15	2023-03-31	13F	ALLIANT ENERGY	COM	018802108	13,399,166	-593,439	-4.24	715,515	-7.38	0.0404
2023-05-15	2022-12-31	13F/A-99	ALLIANT ENERGY	COM	018802108	13,992,605	-333,908	-2.33	772,532	1.76	0.0454
2023-05-15	2022-12-31	13F	ALLIANT ENERGY	COM	018802108	13,992,605	-333,908		772,532		0.0454
2022-11-15	2022-09-30	13F	ALLIANT ENERGY	COM	018802108	14,326,513	224,263	1.59	759,162	-8.15	0.0480
2022-08-15	2022-06-30	13F	ALLIANT ENERGY	COM	018802108	14,102,250	409,929	2.99	826,533	-3.39	0.0495
2022-05-16	2022-03-31	13F	ALLIANT ENERGY	COM	018802108	13,692,321	1,021,148	8.06	855,496	9.83	0.0423
2022-02-14	2021-12-31	13F	ALLIANT ENERGY	COM	018802108	12,671,173	47,849	0.38	778,897	10.22	0.0369
2021-11-15	2021-09-30	13F	ALLIANT ENERGY	COM	018802108	12,623,324	351,225	2.86	706,654	3.27	0.0373
2021-08-16	2021-06-30	13F	ALLIANT ENERGY	COM	018802108	12,272,099	-114,457	-0.92	684,292	2.00	0.0361
2021-07-09	2021-03-31	13F/A-1	ALLIANT ENERGY	COM	018802108	12,386,556	-135,030	-1.08	670,856	3.97	0.0385
2021-05-17	2021-03-31	13F	ALLIANT ENERGY	COM	018802108	12,386,556	-135,030		670,856		0.0385
2021-02-16	2020-12-31	13F	ALLIANT ENERGY	COM	018802108	12,521,586	-534,337	-4.09	645,237	-4.32	0.0395
2020-11-10	2020-09-30	13F	ALLIANT ENERGY	COM	018802108	13,055,923	-370,750	-2.76	674,338	4.98	0.0460
2020-08-14	2020-06-30	13F	ALLIANT ENERGY	COM	018802108	13,426,673	-117,015	-0.86	642,332	-1.79	0.0467
2020-06-19	2020-03-31	13F/A-1	ALLIANT ENERGY	COM	018802108	13,543,688	477,735	3.66	654,025	-8.52	0.0572
2020-05-11	2020-03-31	13F	ALLIANT ENERGY	COM	018802108	13,543,688	477,735		654,025		57,436.5640
2020-02-06	2019-12-31	13F	ALLIANT ENERGY	COM	018802108	13,065,953	696,570	5.63	714,969	7.18	0.0490
2019-11-14	2019-09-30	13F	ALLIANT ENERGY	COM	018802108	12,369,383	122,390	1.00	667,081	10.98	0.0497
2019-08-14	2019-06-30	13F	ALLIANT ENERGY	COM	018802108	12,246,993	64,510	0.53	601,082	4.69	0.0448
2019-05-15	2019-03-31	13F	ALLIANT ENERGY	COM	018802108	12,182,483	333,544	2.81	574,160	14.69	0.0448
2019-02-12	2018-12-31	13F	ALLIANT ENERGY	COM	018802108	11,848,939	361,789	3.15	500,618	2.37	0.0456
2018-11-09	2018-09-30	13F	ALLIANT ENERGY	Common equity shares	018802108	11,487,150	127,293	1.12	489,022	1.72	0.0376
2018-08-14	2018-06-30	13F	ALLIANT ENERGY	Common equity shares	018802108	11,359,857	-75,303	-0.66	480,749	2.89	0.0402
2018-05-15	2018-03-31	13F	ALLIANT ENERGY	Common equity shares	018802108	11,435,160	-333,465	-2.83	467,242	-6.82	0.0397
2018-02-14	2017-12-31	13F	ALLIANT ENERGY	Common equity shares	018802108	11,768,625	-77,896	-0.66	501,455	1.83	0.0403
2017-11-14	2017-09-30	13F	ALLIANT ENERGY	Common equity shares	018802108	11,846,521	71,285	0.61	492,457	4.11	0.0425
2017-08-14	2017-06-30	13F	ALLIANT ENERGY	Common equity shares	018802108	11,775,236	-231,220	-1.93	473,003	-0.54	0.0418
2017-05-15	2017-03-31	13F	ALLIANT ENERGY	Common equity shares	018802108	12,006,456	-46,142	-0.38	475,585	4.14	0.0424
2017-02-09	2016-12-31	13F	ALLIANT ENERGY	Common equity shares	018802108	12,052,598	-59,784	-0.49	456,671	-1.59	0.0430
2017-01-13	2016-09-30	13F/A-1	ALLIANT ENERGY	Common equity shares	018802108	12,112,382	-191,302	-1.55	464,028	-5.00	0.0468
2016-11-14	2016-09-30	13F	ALLIANT ENERGY	Common equity shares	018802108	9,734,113			372,917
2016-08-12	2016-06-30	13F	ALLIANT ENERGY	Common equity shares	018802108	12,303,684	8,038,387	188.46	488,459	54.17	0.0525
2016-05-20	2016-03-31	13F/A-1	ALLIANT ENERGY	Common equity shares	018802108	4,265,297	173,519	4.24	316,828	23.99	0.0343
2016-05-12	2016-03-31	13F	ALLIANT ENERGY	Common equity shares	018802108	4,265,297			316,828
2016-02-16	2015-12-31	13F	ALLIANT ENERGY	Common equity shares	018802108	4,091,778	46,109	1.14	255,528	7.99	0.0279
2015-11-16	2015-09-30	13F	ALLIANT ENERGY	Common equity shares	018802108	4,045,669	24,271	0.60	236,627	1.94	0.0275
2015-08-13	2015-06-30	13F	ALLIANT ENERGY	Common equity shares	018802108	4,021,398	-44,479	-1.09	232,114	-9.39	0.0248
2015-05-15	2015-03-31	13F	ALLIANT ENERGY	Common equity shares	018802108	4,065,877	47,908	1.19	256,161	-4.01	0.0263
2015-02-11	2014-12-31	13F	ALLIANT ENERGY	Common equity shares	018802108	4,017,969	-15,980	-0.40	266,865	19.39	0.0266
2014-11-12	2014-09-30	13F/A-1	ALLIANT ENERGY	Common equity shares	018802108	4,033,949	-72,871	-1.77	223,519	-10.57	0.0240
2014-11-10	2014-09-30	13F	ALLIANT ENERGY	Common equity shares	018802108	4,033,949			223,519
2014-08-12	2014-06-30	13F	ALLIANT ENERGY	Common equity shares	018802108	4,106,820	120,031	3.01	249,944	10.36	0.0270
2014-05-15	2014-03-31	13F/A-1	ALLIANT ENERGY	Common equity shares	018802108	3,986,789	68,074	1.74	226,481	12.00	0.0257
2014-05-13	2014-03-31	13F	ALLIANT ENERGY	Common equity shares	018802108	3,987,846			226,541
2014-02-06	2013-12-31	13F/A-1	ALLIANT ENERGY	Common equity shares	018802108	3,918,715	-50,570	-1.27	202,207	2.81	0.0225
2014-02-06	2013-12-31	13F	ALLIANT ENERGY	Common equity shares	018802108	3,998,466			175,583
2013-11-12	2013-09-30	13F	ALLIANT ENERGY	Common equity shares	018802108	3,969,285	-125,121	-3.06	196,683	-4.72	0.0242
2013-08-08	2013-06-30	13F	ALLIANT ENERGY	Common equity shares	018802108	4,094,406	4,094,406		206,432		0.0269

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.