Stock ownership · SEC 13F · Q4 2025

ALLIANT ENERGY CORP

A breakdown of ALLIANT ENERGY CORP's institutional base (CUSIP 018802108): the holders, the concentration among them, and what changed last quarter.

$2.4M
Reported value
4
Institutions
100%
Top-5 share

The verdict

$2.4M of ALLIANT ENERGY CORP is reported by 4 institutions as of Q4 2025; ownership is held overwhelmingly by a small core of institutions.

4
institutions hold it
$2.4M
reported 13F value
100%
held by top 5

Based on long positions reported to the SEC as of Q4 2025; 13F omits shorts, options and non-US holdings.

How 13F ownership is computed · All tracked stocks · Concentration rankings

SEC Form 13F-HR ownership desk

CUSIP 018802108 · Q4 2025 $2M reported

VALUE-TRACE · HOLDERS-FOCUS · CONC-DOM · PHOTO-UNK · ACTIVITY-MID · BOOK-FULL

  • VALUE-TRACE $2.4M
  • HOLDERS-FOCUS 4 filers
  • CONC-DOM 100% top-5
  • PHOTO-UNK No peer
  • ACTIVITY-MID 3 new
  • BOOK-FULL 8Q history

Read with: Ownership concentration guide - ALLIANT ENERGY CORP's top-five holders account for 100% of reported value — read concentration before treating any single filer as a signal.

Largest institutional holders of ALLIANT ENERGY CORP
  1. 1
    Pacer Advisors, Inc. $2.3M
  2. 2
    Strategic Investment Solutions, Inc. /IL $16K
  3. 3
    Bell Investment Advisors, Inc $11K
  4. 4
    Anchor Investment Management, LLC $715

Top 4 reported holders by value · Q4 2025

Institutional ownership over time

The number of institutions reporting a ALLIANT ENERGY CORP position has held steady from 4 to 4 over the last 8 quarters of 13F filings.

246810 Q1'24Q2'24Q3'24Q4'24Q1'25Q2'25Q3'25Q4'25 4
Distinct 13F filers holding ALLIANT ENERGY CORP, by quarter

Top Institutional Holders

# Institution Shares Value Share of reported
1 Pacer Advisors, Inc. 36,014 $2.3M 98.8%
2 Strategic Investment Solutions, Inc. /IL 247 $16K 0.7%
3 Bell Investment Advisors, Inc 170 $11K 0.5%
4 Anchor Investment Management, LLC 11 $715 0.0%

Investment Discretion

SEC Form 13F requires each institutional filer to report whether it exercises sole or shared discretion over a position. Among ALLIANT ENERGY CORP's reported holders for Q4 2025, by reported value:

Sole discretion (SOLE)
100.0%

Latest Quarter Activity · Q4 2025

New positions (3)

Pacer Advisors, Inc. $2.3M
Strategic Investment Solutions, Inc. /IL $16K
Anchor Investment Management, LLC $715

Complete exits (8)

CIBC Private Wealth Group LLC exited
CIBC Bancorp USA Inc. exited
Fulcrum Asset Management LLP exited
OARSMAN CAPITAL, INC. exited
Capital Square, LLC exited
Kimelman & Baird, LLC exited

Frequently Asked Questions

How many institutions hold ALLIANT ENERGY CORP?▼
ALLIANT ENERGY CORP is held by 4 institutional investors per the latest SEC Form 13F filings as of Q4 2025.
What is the total institutional value of ALLIANT ENERGY CORP?▼
Institutions report $2.4M of ALLIANT ENERGY CORP as of Q4 2025.
How concentrated is ownership of ALLIANT ENERGY CORP?▼
The top five institutional holders account for 100% of the reported institutional value in ALLIANT ENERGY CORP, making ownership held overwhelmingly by a small core of institutions.
Who is the largest institutional holder of ALLIANT ENERGY CORP?▼
Pacer Advisors, Inc. is the largest reported holder of ALLIANT ENERGY CORP with $2.3M across 36,014 shares as of Q4 2025.

Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q4 2025 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Short positions and most derivatives are not disclosed.

PlainFundData is rendered directly from SEC EDGAR Form 13F-HR institutional holdings filings, no number is typed in by an editor. Holder lists, concentration, and reported value on this page are aggregated live from those 13F-HR extracts. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-16.