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LNT · Alliant Energy Corp

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$67.86 -1.60 (-2.30%) At close · Aug 21
Market Cap
$17.59B
Shares
258.28M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 876
Total Value: $19,319,767,903
Total Shares: 253,241,224

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 876 13F filers · Δ vs Mar 31, 2026
Top Holder
9.9%
Sep 2023 → Jun 2026 · range 9.9% – 16.0%
−0.4 pts
Top 5
33.7%
Sep 2023 → Jun 2026 · range 33.7% – 45.6%
−1.4 pts
Top 10
49.4%
Sep 2023 → Jun 2026 · range 49.4% – 59.7%
−2.3 pts
HHI
333
Sep 2023 → Jun 2026 · range 333 – 564
Broadly held−22

Quarterly Activity

vs Mar 31, 2026
New
95
Increased
366
Decreased
249
Sold Out
78
Unchanged
166
Holder count: +17
Institutional value: +12.5%
Shares held: +5.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 886
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 352541 CUSIP 018802108 13F (30d) 757 filings 723 filers Visit website Investor relations