Company: ASB
Filing Date: 2025-12-30
Form Type: S-4
Source: 0001193125-25-337086
Chunk: 74

Company: ASSOCIATED BANC-CORP
Filing Date: 2025-12-30
Form: S-4
Chunk 74
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 as described below; |

| • |     | your aggregate tax basis in the Associated common stock that you receive in exchange for American National common                                                                                                                   
 stock in the merger (including any fractional share interest you are deemed to receive and exchange for cash, as described below) will equal your aggregate tax basis in the American National common stock exchanged therefor; and |

| • |     | your holding period for the Associated common stock that you receive in exchange for American National common                                                                                                                           
 stock in the merger (including any fractional share interest you are deemed to receive and exchange for cash, as described below) will include your holding period for the shares of American National common stock exchanged therefor. |

If you acquired different blocks of American National common stock at different times and at different prices, your tax basis and holding period in your Associated common stock may be determined with reference to each block of American National common stock. You should consult your tax advisor regarding the determination of the tax basis and/or holding periods of the particular shares of Associated common stock received in the merger. Cash Instead of Fractional Shares If you receive cash instead of fractional shares of Associated common stock, you generally will be treated as having received the fractional share of Associated common stock pursuant to the Merger and then as having exchanged that fractional share for cash in redemption by Associated. You generally will recognize capital gain or loss on any cash received instead of fractional shares of Associated common stock equal to the difference between the amount of cash received and your adjusted tax basis in such fractional share. Any capital gain or loss will constitute long-term capital gain or loss if your holding period in American National common stock surrendered in the Merger is greater than one (1) year as of the effective time of the Merger and otherwise will be short-term capital gain. Long-term capital gains recognized by certain non-corporatetaxpayers, including individuals, are generally taxed at preferential U.S. federal income tax rates. There are currently no preferential U.S. federal income tax rates for long-term capital gains of a U.S. holder that is a corporation. The deductibility of a capital loss is subject to significant limitations under the Code. Closing Condition Tax Opinions It is a condition to the closing of the Merger that Associated and American National receive an opinion from Wachtell, Lipton, Rosen & Katz and Alston & Bird LLP, respectively, dated as of the closing date of the Merger, to the effect that the Merger will qualify as a “reorganization” within the meaning