Alliant Energy Corp
Ownership
Ownership Structure
Who owns Alliant Energy Corp (LNT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.7% of the shares are freely tradable; institutional investors hold 94.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 9.64 | 24,986,672 | +2.0 | 06/30/2026 |
| State Street Corp | 6.78 | 17,571,998 | +3.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.50 | 16,861,714 | +1.0 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.55 | 14,386,177 | -1.4 | 06/30/2026 |
| T. Rowe Price Associates, Inc. | 4.44 | 11,515,298 | +8.5 | 06/30/2026 |
| HHG PLC | 4.35 | 11,273,621 | +1.2 | 03/31/2026 |
| Jupiter Topco LLC | 4.23 | 10,977,426 | +0.0 | 06/30/2026 |
| Nuveen, LLC | 3.04 | 7,890,946 | +6.1 | 06/30/2026 |
| Geode Capital Management, LLC | 2.86 | 7,407,445 | +2.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.17 | 8,215,876 | +0.2 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Durian Robert J | EVP and CFO | 158,146 | 11,402,322 $ | Aug 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 10, 2026 | Durian Robert J | EVP and CFO | Sell | 0 | 68.60 | 0 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.