Cover	12 Months Ended
Cover	Dec. 31, 2025
Document Information [Line Items]
Document Type	DEF 14A
Amendment Flag	false
Entity Information [Line Items]
Entity Registrant Name	ASSOCIATED BANC-CORP
Entity Central Index Key	0000007789

Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2025

USD ($)

Dec. 31, 2024

USD ($)

Dec. 31, 2023

USD ($)

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

This section also contains graphical disclosures of the pay versus performance

relationship based on the information in the Pay Versus Performance Table.


							Value of Initial Fixed $100 Investment Based On:
Year	Summary Compensation Table Total for PEO (Harmening)	Compensation Actually Paid to PEO (Harmening) 1,7	Summary Compensation Table Total for PEO (Flynn)	Compensation Actually Paid to PEO (Flynn)1,6,7	Average Summary Compensation Table Total for Non-PEO NEOs	Average Compensation Actually Paid to Non-PEO NEOs1,6,7	Total Shareholder Return2	Peer Group Total Shareholder Return (KBW Nasdaq Regional Banking Total Return Index)3	Net Income4	Adjusted Operating Leverage5
2025	$6,354,626	$6,974,007	N/A	N/A	$1,609,517	$1,738,877	$183.67	$152.71	$474,777	6.8%
2024	$5,473,089	$7,373,224	N/A	N/A	$1,463,169	$1,803,689	$164.22	$143.39	$123,145	(2.0)%
2023	$4,746,720	$2,790,277	N/A	N/A	$1,289,292	$965,082	$141.30	$126.67	$182,956	1.3%
2022	$6,066,586	$6,445,013	N/A	N/A	$1,603,303	$1,653,420	$145.46	$127.17	$366,122	11.9%
2021	$11,330,092	$11,317,941	$3,393,524	$4,998,727	$1,393,032	$1,608,777	$137.25	$136.64	$350,994	3.5%

Named Executive Officers, Footnote


Year	PEO(s)	Non-PEO NEOs
2025	Andrew J. Harmening	Derek S. Meyer, John A. Utz, Randall J. Erickson, Julio N. Manso
2024	Andrew J. Harmening	Derek S. Meyer, John A. Utz, Randall J. Erickson, David L. Stein
2023	Andrew J. Harmening	Derek S. Meyer, John A. Utz, Randall J. Erickson, David L. Stein
2022	Andrew J. Harmening	Derek S. Meyer, Christopher J. Del Moral-Niles, John A. Utz, Randall J. Erickson, David L. Stein
2021	Andrew J. Harmening and Philip B. Flynn	Christopher J. Del Moral-Niles, John A. Utz, Randall J. Erickson, David L. Stein

Peer Group Issuers, Footnote

For the relevant fiscal year, represents the cumulative TSR of the KBW Nasdaq Regional Banking Total Return Index (^KRXTR). The KRXTR is comprised of approximately 50 publicly traded regional banks or thrifts listed on U.S. stock market exchanges.

PEO Total Compensation Amount

$ 6,354,626

$ 5,473,089

$ 4,746,720

$ 6,066,586

$ 11,330,092

PEO Actually Paid Compensation Amount

6,974,007

$ 7,373,224

2,790,277

6,445,013

11,317,941

Adjustment To PEO Compensation, Footnote


	2025
Adjustments	PEO: Andrew J. Harmening	Average non-PEO NEOs
As Reported Summary Compensation Table Total	$6,354,626	$1,609,517
Grant Date Fair Value of Stock Awards Granted in FY	(2,799,980)	(575,507)
Awards granted in CFY that are outstanding and unvested as of end of CFY	3,229,318	667,235
Awards that are granted and vest in the same CFY	—	—
Prior year awards outstanding and unvested as of end of CFY	(210,265)	(32,752)
Prior year awards that vest in CFY	255,416	45,403
Prior year awards that fail to meet vesting conditions during CFY	(106,094)	(19,189)
Dividends or other earnings paid on all awards in CFY prior to vesting date	252,825	49,406
Change in Pension Value and Non-Qualified Deferred Compensation Earnings	(5,921)	(7,548)
Pension Adjustment	4,082	2,313
Compensation Actually Paid	$6,974,007	$1,738,877

FY = Fiscal Year

CFY = Covered Fiscal Year

Non-PEO NEO Average Total Compensation Amount

1,609,517

$ 1,463,169

1,289,292

1,603,303

1,393,032

Non-PEO NEO Average Compensation Actually Paid Amount

1,738,877

$ 1,803,689

965,082

1,653,420

1,608,777

Adjustment to Non-PEO NEO Compensation Footnote

Compensation Actually Paid to our NEOs represents the “Total” compensation reported in the Summary Compensation Table for the applicable fiscal year,

adjusted as follows:


	2025
Adjustments	PEO: Andrew J. Harmening	Average non-PEO NEOs
As Reported Summary Compensation Table Total	$6,354,626	$1,609,517
Grant Date Fair Value of Stock Awards Granted in FY	(2,799,980)	(575,507)
Awards granted in CFY that are outstanding and unvested as of end of CFY	3,229,318	667,235
Awards that are granted and vest in the same CFY	—	—
Prior year awards outstanding and unvested as of end of CFY	(210,265)	(32,752)
Prior year awards that vest in CFY	255,416	45,403
Prior year awards that fail to meet vesting conditions during CFY	(106,094)	(19,189)
Dividends or other earnings paid on all awards in CFY prior to vesting date	252,825	49,406
Change in Pension Value and Non-Qualified Deferred Compensation Earnings	(5,921)	(7,548)
Pension Adjustment	4,082	2,313
Compensation Actually Paid	$6,974,007	$1,738,877

FY = Fiscal Year

CFY = Covered Fiscal Year

Compensation Actually Paid vs. Total Shareholder Return

TSR amounts reported in the graph assume an initial fixed investment of $100, and that all dividends, if any, were reinvested.

Compensation Actually Paid vs. Net Income

The following graph compares (i) Compensation Actually Paid to our PEOs and the average Compensation Actually Paid to our

other NEOs to (ii) our net income, for the fiscal years ended December 31, 2021, 2022, 2023, 2024 and 2025.

Compensation Actually Paid vs. Company Selected Measure

The following graph compares (i) Compensation Actually Paid to our PEOs and the average Compensation Actually Paid to our

other NEOs to (ii) our adjusted operating leverage, for the fiscal years ended December 31, 2021, 2022, 2023, 2024 and 2025.

(1) Operating Leverage is calculated by taking the year over year percentage change in Total Revenue Before Long-Term Credit Charge minus the percentage

change in Total Noninterest Expense. A positive ratio shows that revenue is growing faster than expenses. Whereas a negative ratio indicates that expenses are

accumulating faster than revenue. The 2021 ratio has been adjusted to exclude the gain on the June 30, 2020 sale of ABRC. The 2023 ratio has been adjusted to

exclude a loss on a mortgage portfolio sale and investment securities losses associated with nonrecurring losses from the balance sheet repositioning announced

during the fourth quarter of 2023 and expenses for certain FDIC assessments impacts. The 2024 ratio has been adjusted to exclude a loss on a mortgage

portfolio sale, investment securities losses, interest income and expense for prepayment on FHLB advances with nonrecurring transactions from the balance

sheet repositioning announced during the fourth quarter of 2024. See further details of these adjustments within the non-GAAP tables in Appendix A.

Tabular List, Table


Company-Selected Performance Measures
Company-Selected Performance Measures
Adjusted Operating Leverage
Revenue (growth)
Net Income After Tax
ROATCE
EPS
Efficiency Ratio

Total Shareholder Return Amount

183.67

$ 164.22

141.30

145.46

137.25

Peer Group Total Shareholder Return Amount

152.71

143.39

126.67

127.17

136.64

Net Income (Loss)

$ 474,777,000

$ 123,145,000

$ 182,956,000

$ 366,122,000

$ 350,994,000

Company Selected Measure Amount

0.068

(0.020)

0.013

0.119

0.035

PEO Name

Andrew J. Harmening

Andrew J. Harmening and Philip B. Flynn

Measure:: 1

Pay vs Performance Disclosure

Name

Adjusted Operating Leverage

Non-GAAP Measure Description

Operating Leverage is calculated by taking the year over year percentage change in Total Revenue Before Long-Term Credit Charge minus the percentage

change in Total Noninterest Expense. A positive ratio shows that revenue is growing faster than expenses. Whereas a negative ratio indicates that expenses are

accumulating faster than revenue. The 2021 ratio has been adjusted to exclude the gain on the June 30, 2020 sale of Associated Benefits and Risk Consulting

(“ABRC”). The 2023 ratio has been adjusted to exclude a loss on a mortgage portfolio sale and investment securities losses associated with nonrecurring losses

from the balance sheet repositioning announced during the fourth quarter of 2023 and expense for certain FDIC assessments impacts.The 2024 ratio has been

adjusted to exclude a loss on a mortgage portfolio sale, investment securities losses, interest income and expense for prepayment FHLB advances with

nonrecurring transactions from the balance sheet repositioning announced during the fourth quarter of 2024. See further details of these adjustments within the

non-GAAP tables in Appendix A.

(6) Compensation Actually Paid includes the ASC 718 fair value of option awards. For 2023, there is a change in the methodology to determine the value of

option awards, which has been updated in response to recent SEC guidance and interpretation. The change in methodology does not represent a material change

in the underlying value of the option awards, and thus does not represent a material change in Compensation Actually Paid.

Measure:: 2

Pay vs Performance Disclosure

Name

Revenue (growth)

Measure:: 3

Pay vs Performance Disclosure

Name

Net Income After Tax

Measure:: 4

Pay vs Performance Disclosure

Name