Alliant Energy Corporation
Alliant Energy Corporation (LNT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · LNT · as of Mar 31, 2025
Ownership Breakdown
788
Institutional Holders
▲ 64 vs Q4
$13.43B
Total Inst. Value
▲ $797.77M vs Q4
258.28M
Shares Outstanding
freeFloat 99.70%
208.86M
13F Shares Held
▼ 4.77M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
LNT largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC electric & other services combined | 32.82M | 12.78% | 12.78% | $2.11T | May 9, 2025 | ▲ 158.5K |
BLACKROCK, INC. electric & other services combined | 23.60M | 9.19% | 9.19% | $1.52T | May 2, 2025 | ▼ 978.8K |
STATE STREET CORP electric & other services combined | 16.38M | 6.38% | 6.38% | $1.05T | May 15, 2025 | ▲ 11.7K |
JANUS HENDERSON GROUP PLC electric & other services combined | 10.87M | 4.23% | 4.23% | $690.98B | May 15, 2025 | ▲ 99.8K |
VICTORY CAPITAL MANAGEMENT INC electric & other services combined | 10.59M | 4.12% | 4.12% | $681.47B | May 2, 2025 | ▼ 216.2K |
GEODE CAPITAL MANAGEMENT, LLC electric & other services combined | 6.90M | 2.69% | 2.69% | $442.76B | May 13, 2025 | ▲ 205.1K |
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ electric & other services combined | 6.70M | 2.61% | 2.61% | $431.01B | May 2, 2025 | ▼ 314.7K |
NUVEEN, LLC electric & other services combined | 6.31M | 2.46% | 2.46% | $404.30B | May 12, 2025 | NEW |
INVESCO LTD. electric & other services combined | 4.63M | 1.80% | 1.80% | $298.23B | May 12, 2025 | ▼ 236.2K |
FRANKLIN RESOURCES INC electric & other services combined | 3.67M | 1.43% | 1.43% | $236.00B | May 13, 2025 | ▼ 223 |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
21
Increased
+3.10M shares3
New Positions
first time holders26
Decreased
−7.50M shares0
Sold Out
fully exitedNet shares change (top 50)
4.40M
+3.10M / −7.50M
Net new holders
-2
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
LNT insider trading · insider activity
Source: SEC Form 4
7
Buy transactions
1
Sell transactions
7.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Smyth Antonio P Executive Vice President | Apr 15, 2026 | Tax Withhold | 1,259 | $72.18 | $90.9K | 20.7K | Form 4 ↗ |
ALLEN PATRICK E director | Apr 10, 2026 | Award | 512.996 | — | — | 45.5K | Form 4 ↗ |
Cortina Ignacio A director | Apr 10, 2026 | Award | 666.895 | — | — | 10.2K | Form 4 ↗ |
Cox Stephanie director | Apr 10, 2026 | Award | 547.196 | — | — | 17.3K | Form 4 ↗ |
Falotico Nancy Joy director | Apr 10, 2026 | Award | 778.044 | — | — | 19.6K | Form 4 ↗ |
Garcia Michael Dennis director | Apr 10, 2026 | Award | 875.513 | — | — | 25.8K | Form 4 ↗ |
Newport Roger K director | Apr 10, 2026 | Award | 769.494 | — | — | 31.4K | Form 4 ↗ |
Raymond Christie director | Apr 10, 2026 | Award | 1,043.092 | — | — | 8.6K | Form 4 ↗ |
Valcq Rebecca C. Vice President | Feb 19, 2026 | Tax Withhold | 438 | $70.01 | $30.7K | 2.3K | Form 4 ↗ |
Barton Lisa M President and CEO | Feb 19, 2026 | Award | 29,527 | — | — | 136.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Alliant Energy Corporation (LNT) is primarily owned by institutional investors, who hold approximately 80.9% of total shares outstanding. Company insiders own approximately 0.30%, while retail and public investors account for the remaining 18.83%.
The largest institutional shareholder of Alliant Energy Corporation is VANGUARD GROUP INC, holding approximately 32.82 million shares — equal to 12.78% of outstanding shares — as of March 31, 2025.
A total of 788 institutional investors currently hold LNT stock, with a combined institutional value of approximately $13.43 billion as of the most recent 13F filing period.
Frequently asked questions
LNT ownershipAlliant Energy Corporation (LNT) is primarily owned by institutional investors, who hold approximately 80.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 12.78% stake. Company insiders hold 0.30%. Data sourced from SEC Form 13F as of March 31, 2025.