LNT offering history
Every offering-related filing in ALLIANT ENERGY CORP’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,009 filings back to Nov 20, 2013.
| Date | Filing | What it means | |
|---|---|---|---|
| Mar 19, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 25, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 23, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 23, 2025 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| May 15, 2025 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| May 9, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 15, 2023 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Nov 6, 2023 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Mar 13, 2023 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Mar 3, 2023 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Dec 15, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 15, 2020 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Nov 6, 2020 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Nov 15, 2019 | 424B2 → | EXECUTED | Prospectus supplement priced — shares or notes (large filers: often a bond deal) |
| Nov 14, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 14, 2018 | 424B2 → | EXECUTED | Prospectus supplement priced — shares or notes (large filers: often a bond deal) |
| Dec 13, 2018 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 21, 2018 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 15, 2017 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Nov 6, 2017 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| May 9, 2017 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 4, 2015 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 15, 2014 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Nov 10, 2014 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
Two honest limits. (1) A 424B takedown can price shares or notes— EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.
LNT offering FAQ
When did LNT last execute an offering?
Per SEC filings, ALLIANT ENERGY CORP's most recent priced offering document is a 424B5 filed 2026-03-19. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did LNT last announce or register an offering?
The most recent registration is a S-3ASR filed 2023-12-15. A registration is capacity to sell shares — not a sale.
Does an offering always mean dilution?
Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.