SEC ownership of ALLETE INC

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000066756.

Holder evidence

6

Lead holder

Heidi E. Jimmerson

13D/G signal

—

Latest evidence

05 Feb 2025

Top shareholders Insider holders Latest transactions
Issuer identity
CIK
0000066756
Location
Duluth, MN
Ownership snapshot
SEC evidence mix
3/4/5
Lead holder
Heidi E. Jimmerson
Latest evidence date
05 Feb 2025

Ownership snapshot

Top shareholders of ALLETE INC (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder
Heidi E. Jimmerson
13D/G signal
—
Evidence rows
6
Latest as of
05 Feb 2025
3/4/5 Highest disclosed value: $1,376,922
Holder Evidence Ownership % Position 12M Net Δ As of
Heidi E. Jimmerson
3/4/5
Director
3/4/5
—
class O/S missing
$1,376,922
23,006 shares
 — 19 Aug 2021
Steven W. Morris
3/4/5
Sr VP & CFO
3/4/5
—
class O/S missing
$1,196,199
18,224 shares
 — 05 Feb 2025
Kathryn W. Dindo
3/4/5
Director
3/4/5
—
class O/S missing
$1,172,643
19,593 shares
 — 01 Jun 2021
Robert J. Adams
3/4/5
Senior Vice President
3/4/5
—
class O/S missing
$1,158,184
19,351 shares
 — 09 Feb 2022
Patrick L. Cutshall
3/4/5
VP & Treasurer
3/4/5
—
class O/S missing
$670,697
11,524 shares
 — 07 Feb 2024
Margaret A. Thickens
3/4/5
VP, Ch. Legal Ofcr & Secretary
3/4/5
—
class O/S missing
$519,802
8,931 shares
 — 07 Feb 2024
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 30 May 2025.

Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 0
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Current reporting-owner rows connected to ALLETE INC. Open the relationship link for the CIK-to-CIK filing trail.

Rows
21
Lead holder
Heidi E. Jimmerson
Net 12M change
$0
Latest report
15 Dec 2025
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Heidi E. Jimmerson Director $1,376,922 Mixed 19 Aug 2021
Steven W. Morris Sr VP & CFO $1,196,199 Mixed 05 Feb 2025
Kathryn W. Dindo Director $1,172,643 Mixed 01 Jun 2021
Robert J. Adams Senior Vice President $1,158,184 Mixed 09 Feb 2022
Patrick L. Cutshall VP & Treasurer $670,697 Mixed 07 Feb 2024
Margaret A. Thickens VP, Ch. Legal Ofcr & Secretary $519,802 Mixed 07 Feb 2024
Susan K. Nestegard Director $0 Mixed 15 Dec 2025
George G. Goldfarb Director $0 Mixed 15 Dec 2025
James J. Hoolihan Director $0 Mixed 15 Dec 2025
Charlene A. Thomas Director $0 Mixed 15 Dec 2025
Charles R. Matthews Director $0 Mixed 15 Dec 2025
Bethany M. Owen Chair, President & CEO, Director $0 Mixed 15 Dec 2025
Nicole R. Johnson VP; Pres.- ACE $0 Mixed 15 Dec 2025
Julie L. Padilla VP, Ch Legal Offcr & Secretary $0 Mixed 15 Dec 2025
Douglas C. Neve Director $0 Mixed 15 Dec 2025
Jeffrey J. Scissons VP CFO & Corp Treasurer $0 Mixed 15 Dec 2025
Joshua J. Skelton VP; COO-Minnesota Power $0 Mixed 15 Dec 2025
Madeleine W. Ludlow Director $0 Mixed 15 Dec 2025
Barbara A. Nick Director $0 Mixed 15 Dec 2025
Colin B. Anderson VP-ALLETE Chf Acct Offr & Cont $0 Mixed 15 Dec 2025
Robert P. Powers Director $0 Mixed 15 Dec 2025

Recent insider transactions for ALLETE INC

Showing up to 300 most recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % Reported value Reported price Shares Shares owned Date Ownership
Joshua J. Skelton ALE Common Stock Disposed to Issuer -100% -4,344 0 15 Dec 2025 By RSOP Trust for Benefit of Spouse
Joshua J. Skelton ALE Common Stock Disposed to Issuer -100% -5,403 0 15 Dec 2025 By RSOP Trust
Joshua J. Skelton ALE Common Stock Disposed to Issuer -100% -775 0 15 Dec 2025 By Spouse
Joshua J. Skelton ALE Common Stock Disposed to Issuer -100% -8,732 0 15 Dec 2025 Direct
Jeffrey J. Scissons ALE Common Stock Disposed to Issuer -100% -1,678 0 15 Dec 2025 By RSOP Trust
Jeffrey J. Scissons ALE Common Stock Disposed to Issuer -100% -4,166 0 15 Dec 2025 Direct
Julie L. Padilla ALE Common Stock Disposed to Issuer -100% -210 0 15 Dec 2025 By RSOP Trust
Julie L. Padilla ALE Common Stock Disposed to Issuer -100% -2,096 0 15 Dec 2025 Direct
Nicole R. Johnson ALE Common Stock Disposed to Issuer -100% -67.57 0 15 Dec 2025 As custodian for child
Nicole R. Johnson ALE Common Stock Disposed to Issuer -100% -5,698 0 15 Dec 2025 By RSOP Trust
Nicole R. Johnson ALE Common Stock Disposed to Issuer -100% -11,890 0 15 Dec 2025 Direct
Colin B. Anderson ALE Common Stock Disposed to Issuer -100% -352 0 15 Dec 2025 By RSOP Trust
Colin B. Anderson ALE Common Stock Disposed to Issuer -100% -2,197 0 15 Dec 2025 Direct
Bethany M. Owen ALE Common Stock Disposed to Issuer -100% -8,928 0 15 Dec 2025 By RSOP Trust
Bethany M. Owen ALE Common Stock Disposed to Issuer -100% -43,137 0 15 Dec 2025 Direct
Charlene A. Thomas ALE Common Stock Disposed to Issuer -100% -8,311 0 15 Dec 2025 Direct
Robert P. Powers ALE Common Stock Disposed to Issuer -100% -15,381 0 15 Dec 2025 Direct
Barbara A. Nick ALE Common Stock Disposed to Issuer -100% -13,631 0 15 Dec 2025 Direct
Douglas C. Neve ALE Common Stock Disposed to Issuer -100% -11,592 0 15 Dec 2025 By Trust
Douglas C. Neve ALE Common Stock Disposed to Issuer -100% -19,597 0 15 Dec 2025 Direct
Susan K. Nestegard ALE Common Stock Disposed to Issuer -100% -14,884 0 15 Dec 2025 Direct
Charles R. Matthews ALE Common Stock Disposed to Issuer -100% -250 0 15 Dec 2025 By Revocable Trust (B)
Charles R. Matthews ALE Common Stock Disposed to Issuer -100% -250 0 15 Dec 2025 By Revocable Trust (A)
Charles R. Matthews ALE Common Stock Disposed to Issuer -100% -7,247 0 15 Dec 2025 Direct
Madeleine W. Ludlow ALE Common Stock Disposed to Issuer -100% -20,783 0 15 Dec 2025 By Trust
Madeleine W. Ludlow ALE Common Stock Disposed to Issuer -100% -5,200 0 15 Dec 2025 Direct
James J. Hoolihan ALE Common Stock Disposed to Issuer -100% -30,394 0 15 Dec 2025 Direct
George G. Goldfarb ALE Common Stock Disposed to Issuer -100% -1,000 0 15 Dec 2025 By Trust
George G. Goldfarb ALE Common Stock Disposed to Issuer -100% -25,442 0 15 Dec 2025 Direct
Barbara A. Nick ALE Common Stock Award 14.4% 1,691 13,408 02 Jun 2025 Direct
Robert P. Powers ALE Common Stock Award 12.6% 1,691 15,073 02 Jun 2025 Direct
George G. Goldfarb ALE Common Stock Award 7.29% 1,691 24,895 02 Jun 2025 Direct
Douglas C. Neve ALE Common Stock Award 9.66% 1,691 19,199 02 Jun 2025 Direct
James J. Hoolihan ALE Common Stock Award 6.03% 1,691 29,748 02 Jun 2025 Direct
Madeleine W. Ludlow ALE Common Stock Award 8.86% 1,691 20,783 02 Jun 2025 By Trust
Susan K. Nestegard ALE Common Stock Award 13.1% 1,691 14,586 02 Jun 2025 Direct
Charles R. Matthews ALE Common Stock Award 31.2% 1,691 7,105 02 Jun 2025 Direct
Charlene A. Thomas ALE Common Stock Award 25.5% 1,691 8,311 02 Jun 2025 Direct
* indicates a reported price that failed the local validity check.
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