Notice of Proposed Sale · 144

Associated Banc-Corp

ASBNYSEEQUITYCurrent

Notice of Proposed Sale

Filed Jul 30, 2026Accepted Jul 30, 2026, 2:47 PM EDTFiling CIK 7789Accession 0001959173-26-005462

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: ASSOCIATED BANC-CORP
Issuer CIK: 0000007789
SEC file number: 001-31343
Phone: 920-491-7500
Person for whose account securities are to be sold: Erickson Randall J.
Relationships to issuer: Officer
Street: 433 MAIN STREET
City: GREEN BAY
State / country code: WI
Postal code: 54301

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	90,573	2,785,048.02	165,941,629	07/30/2026	NYSE	Fidelity Brokerage Services LLC

Broker / market maker — proposed row 1, entry 1

Name: Fidelity Brokerage Services LLC
Street: 900 Salem Street
City: Smithfield
State / country code: RI
Postal code: 02917

Acquisition of securities to be sold

Acquisition of securities to be sold · 20 reported rows
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	04/12/2012	Open Market Purchase	Issuer	2,000	N	04/12/2012	Cash
Common	07/27/2015	Stock Option Exercise	Issuer	2,571	N	07/27/2015	Cash
Common	10/27/2016	Stock Option Exercise	Issuer	4,178	N	10/27/2016	Cash
Common	01/27/2017	Restricted Stock Vesting	Issuer	666	N	01/27/2017	Compensation
Common	02/06/2017	Restricted Stock Vesting	Issuer	6,226	N	02/06/2017	Compensation
Common	02/08/2017	Restricted Stock Vesting	Issuer	1,233	N	02/08/2017	Compensation
Common	01/02/2018	Restricted Stock Vesting	Issuer	498	N	01/02/2018	Compensation
Common	01/27/2018	Restricted Stock Vesting	Issuer	695	N	01/27/2018	Compensation
Common	02/06/2018	Restricted Stock Vesting	Issuer	2,701	N	02/06/2018	Compensation
Common	02/08/2018	Restricted Stock Vesting	Issuer	1,703	N	02/08/2018	Compensation
Common	02/05/2019	Restricted Stock Vesting	Issuer	11,547	N	02/05/2019	Compensation
Common	02/08/2019	Restricted Stock Vesting	Issuer	3,075	N	02/08/2019	Compensation
Common	02/04/2020	Restricted Stock Vesting	Issuer	8,300	N	02/04/2020	Compensation
Common	01/25/2022	Restricted Stock Vesting	Issuer	2,059	N	01/25/2022	Compensation
Common	02/08/2022	Restricted Stock Vesting	Issuer	4,841	N	02/08/2022	Compensation
Common	02/08/2023	Restricted Stock Vesting	Issuer	672	N	02/08/2023	Compensation
Common	12/14/2023	Stock Option Exercise	Issuer	674	N	12/14/2023	Cash
Common	10/30/2024	Stock Option Exercise	Issuer	3,868	N	10/30/2024	Cash
Common	11/06/2024	Stock Option Exercise	Issuer	6,586	N	11/06/2024	Cash
Common	07/30/2026	Stock Option Exercise	Issuer	26,480	N	07/30/2026	Cash

Sales reported in the preceding three months

Sales reported in the preceding three months · 2 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
Randall J. Erickson	Common	05/01/2026	2,000	56,590.00
Randall J. Erickson	Common	05/04/2026	28,311	788,055.92

Seller — prior-sale row 1, entry 1

Name: Randall J. Erickson
Street: 433 Main Street
City: Green Bay
State / country code: WI
Postal code: 54301

Seller — prior-sale row 2, entry 1

Name: Randall J. Erickson
Street: 433 Main Street
City: Green Bay
State / country code: WI
Postal code: 54301

Prior-sale reporting

Nothing to report for the preceding three months: N

Notice signature

Notice date: 07/30/2026
Signed: /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Randall Erickson

Company context

Associated Banc-Corp (NYSE: ASB) has total assets of $51 billion and is the largest bank holding company based in Wisconsin. Headquartered in Green Bay, Wisconsin, Associated is a leading Midwest banking franchise, offering a full range of financial products and services from over 200 banking locations throughout Wisconsin, Illinois, Iowa, Minnesota, Missouri and Nebraska. The Company also operates loan production offices in Indiana, Kansas, Michigan, New York, Ohio and Texas. Associated Bank, N.A. is an Equal Housing Lender, Equal Opportunity Lender and Member FDIC. More information about Associated Banc-Corp is available at www.associatedbank.com.

Current securities

ASBNYSE · EQUITY · Current ASBANYSE · NOTE · Current ASB PRENYSE · PREFERRED · Current ASB PRFNYSE · PREFERRED · Current

Historical securities (5)

ABBCLOTC · PREFERRED · Historical · closed Jun 18, 2020 ABCCLOTC · PREFERRED · Historical · closed Sep 28, 2018 ASB PRCNYSE · PREFERRED · Historical · closed Jun 14, 2021 ASB PRDNYSE · PREFERRED · Historical · closed Sep 14, 2021 ASB.WSNYSE_AMERICAN · WARRANT · Historical · closed Nov 19, 2018

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