What is CUSIP 018802108?

CUSIP 018802108 is the security identifier used in SEC filing datasets for LNT - ALLIANT ENERGY CORP - COM.

Who owns LNT - ALLIANT ENERGY CORP - COM based on 13F filings?

883 institutions reported positions in LNT - ALLIANT ENERGY CORP - COM as of Q2 2026. Open the latest holders period and ownership history tables on this page for position-level details.

Security Snapshot

ALLIANT ENERGY CORP - COM (LNT) Institutional Ownership

CUSIP: 018802108

13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026

13F reference period

Q2 2026

Institutions Reporting

883

Shares (Excl. Options)

253.24M

Full value: 253,236,334 · shares · 30 Jun 2026

Price

$76.29

The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.

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Security type / class: Equity / COM
Symbol: LNT on Nasdaq
All holders as of 30 Jun 2026: Q2 2026
Total 13F shares: 253,236,334
Total 13F value: $19,314,707,191
Portfolio coverage rank: 0.01%
Share change: +14,323,226
Value change: +$1,095,919,890
Number of holders: 883
SEC-reported price per share: $66.46
Insider filing price: $66.46

13F Shares, Excluding Options vs Price

13F Value, Excluding Options

Total Investors

Filing notes and source

Key facts

LNT - ALLIANT ENERGY CORP - COM is tracked under CUSIP 018802108.
883 institutions reported positions in Q2 2026.
Schedule 13D/13G significant owner rows are not currently available.

Change

Holder count moved from 859 to 883 between Q1 2026 and Q2 2026.
SEC-reported value moved from
$17.14B
Full value: $17,144,175,295 · USD · 31 Mar 2026
to
$19.31B
Full value: $19,314,707,191 · USD · 30 Jun 2026
.

Research use

You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 883 institutions filings for Q2 2026.

Open SEC evidence

Security key

018802108

13F reference period

Q2 2026

13F holders

883

13D/G owners

CIK / CUSIP context first

Open Q2 2026 holders LNT full holder history ALLIANT ENERGY CORP SEC filings ALLIANT ENERGY CORP company facts ALLIANT ENERGY CORP insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Recent Quarterly Holder Reports

Open recent reporting periods for CUSIP 018802108:

Q3 2026 (259 holders) Q2 2026 (883 holders) Q1 2026 (859 holders) Q4 2025 (833 holders) Q3 2025 (786 holders) Q2 2025 (769 holders) Q1 2025 (766 holders) Q4 2024 (712 holders) Q3 2024 (674 holders) Q2 2024 (652 holders)

As of 30 Jun 2026, 883 institutional investors reported holding

253.24M

Full value: 253,236,334 · shares · 30 Jun 2026

shares of ALLIANT ENERGY CORP - COM (LNT).

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods

Headline period

Q2 2026

Rows shown

1-25 of 51

Period	13F Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price (Median)	Investors
2026 Q3	5,818,749	$367,152,776	-$6,871,783			$63.30	259
2026 Q2	253,236,334	$19,314,707,191	+$1,095,919,890	$5,035,140	$18,942,807	$76.29	883
2026 Q1	239,032,000	$17,144,175,295	+$601,118,111	$3,840,452	$18,069,168	$71.76	859
2025 Q4	231,098,794	$15,021,237,942	+$531,426,479	$1,059,663	$7,729,689	$65.01	833
2025 Q3	222,691,445	$15,007,064,597	+$642,238,366	$2,352,987	$12,683,790	$67.41	786
2025 Q2	213,350,581	$12,895,137,316	+$281,029,932	$894,956	$37,690,951	$60.47	769
2025 Q1	208,819,935	$13,423,860,951	-$146,017,993	$9,913,820	$39,613,860	$64.35	766
2024 Q4	213,565,219	$12,628,344,547	+$400,363,611	$2,537,106	$3,376,894	$59.14	712
2024 Q3	206,287,416	$12,518,860,715	+$153,435,697	$5,188,995	$10,280,886	$60.69	674
2024 Q2	204,685,404	$10,417,496,303	+$53,362,590	$4,072,000	$4,779,510	$50.90	652
2024 Q1	203,645,373	$10,260,375,517	-$25,284,962	$7,005,600	$4,530,960	$50.40	626
2023 Q4	203,987,472	$10,463,168,169	+$179,035,035	$6,992,190	$3,857,760	$51.30	649
2023 Q3	200,372,379	$9,708,737,061	+$201,611,589	$47,088,555	$5,072,715	$48.45	608
2023 Q2	196,096,013	$10,289,238,901	+$167,558,111	$51,456,169	$12,105,695	$52.48	628
2023 Q1	192,985,507	$10,304,280,921	+$154,270,504	$40,379,760	$17,688,620	$53.40	632
2022 Q4	190,205,326	$10,500,662,225	-$19,308,649	$6,646,898	$11,123,909	$55.21	655
2022 Q3	190,436,751	$10,093,451,854	+$234,982,612	$5,898,000	$22,947,000	$52.99	616
2022 Q2	185,745,010	$10,882,972,486	-$88,037,929	$7,180,000	$8,573,016	$58.61	647
2022 Q1	188,349,950	$11,756,670,774	+$118,085,044	$4,267,000	$14,988,000	$62.48	624
2021 Q4	186,536,788	$11,459,667,194	-$74,829,877	$8,544,000	$17,359,000	$61.47	605
2021 Q3	187,901,370	$10,516,687,204	-$71,378,977	$8,415,000	$11,734,000	$55.98	571
2021 Q2	189,761,774	$10,578,819,642	+$85,469,768	$4,075,000	$16,939,000	$55.76	563
2021 Q1	188,545,390	$10,197,626,737	+$365,566,898	$4,913,000	$14,042,000	$54.16	538
2020 Q4	181,924,843	$9,367,335,261	-$35,775,485	$4,039,000	$11,556,000	$51.53	567
2020 Q3	182,169,273	$9,405,415,184	-$102,118,098	$2,804,000	$4,332,000	$51.65	547