Comparable stake leader
Heidi E. Jimmerson
SEC ownership of ALLETE INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000066756.
Disclosed value leader
Heidi E. Jimmerson
Comparable rows
0/7
Latest evidence
31 Mar 2026
- Parsed ownership sources
-
3/4/5 and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Heidi E. Jimmerson
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000066756
- Issuer location
- Duluth, MN
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
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.
Comparable stake leader
Heidi E. Jimmerson
Disclosed value leader
Heidi E. Jimmerson
Comparable rows
0/7
Latest evidence
31 Mar 2026
3/4/5
13F
Highest disclosed value: $1,376,922
7 rows are not safely comparable across share classes.
Quick read
Heidi E. Jimmerson has the largest disclosed position value at $1.38M.
0 of 7 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Heidi E. Jimmerson's linked filing trail.
Disclosed position value
Top 5
Heidi E. Jimmerson
$1.38M
Steven W. Morris
$1.2M
Kathryn W. Dindo
$1.17M
Robert J. Adams
$1.16M
Patrick L. Cutshall
$670.7K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-7 of 7 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Heidi E. Jimmerson |
3/4/5
Director
|
—
class O/S missing
|
$1,376,922
23,006 shares
|
— | 19 Aug 2021 |
| Steven W. Morris |
3/4/5
Sr VP & CFO
|
—
class O/S missing
|
$1,196,199
18,224 shares
|
— | 05 Feb 2025 |
| Kathryn W. Dindo |
3/4/5
Director
|
—
class O/S missing
|
$1,172,643
19,593 shares
|
— | 01 Jun 2021 |
| Robert J. Adams |
3/4/5
Senior Vice President
|
—
class O/S missing
|
$1,158,184
19,351 shares
|
— | 09 Feb 2022 |
| Patrick L. Cutshall |
3/4/5
VP & Treasurer
|
—
class O/S missing
|
$670,697
11,524 shares
|
— | 07 Feb 2024 |
| Margaret A. Thickens |
3/4/5
VP, Ch. Legal Ofcr & Secretary
|
—
class O/S missing
|
$519,802
8,931 shares
|
— | 07 Feb 2024 |
| FLAGSHIP WEALTH ADVISORS, LLC |
13F
Company
|
—
class O/S missing
|
$8,521
133 shares
|
— | 31 Mar 2026 |
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 05 Aug 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
Showing 1-20 of 21 reporting-owner rows connected to ALLETE INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Heidi E. Jimmerson
Net 12M change
$0
Latest report
15 Dec 2025
Recent insider transactions for ALLETE INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-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 |
* marks a reported price that did not pass the local price check.