Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2023 or (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (715) 845-7331 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commissi ...

Financial Position - Total assets decreased by $3.2 million, or 1.3%, to $235.6 million at September 30, 2023, from $238.8 million at June 30, 2023 [151]. - Total deposits decreased by $8.6 million, or 4.4%, to $188.6 million at September 30, 2023, from $197.2 million at June 30, 2023 [155]. - Total stockholders' equity increased by $178,000, or 0.6%, to $31.5 million at September 30, 2023, from $31.3 million at June 30, 2023 [157]. - Federal Home Loan Bank (FHLB) advances increased by $5.0 million to $13.0 million at September 30, 2023, compared to $8.0 million at June 30, 2023 [156]. - The company was classified as "well capitalized" for regulatory capital purposes as of September 30, 2023 [206]. Loan Portfolio - Loans decreased by $180,000, or 0.09%, to $199.7 million at September 30, 2023, with a notable decrease in consumer loans by $1.0 million, or 35.7% [154]. - Commercial real estate loans increased by $489,000, or 0.6%, to $85.1 million at September 30, 2023 [154]. - The allowance for credit losses at September 30, 2023, reflects the company's current estimate of lifetime credit losses expected from its loan portfolio [143]. - The allowance for credit losses was $2.0 million, or 1.01% of loans outstanding at September 30, 2023, down from $2.1 million, or 1.05%, at September 30, 2022 [174]. - The provision for credit losses for the three months ended September 30, 2023, was $41,000, while total charge-offs amounted to $137,000, resulting in net charge-offs of $136,000 [199]. Income and Expenses - Net income decreased by $425,000, or 83.1%, to $86,000 for the three months ended September 30, 2023, from $511,000 for the same period in 2022 [164]. - Interest income increased by $378,000, or 18.7%, to $2.4 million for the three months ended September 30, 2023, compared to $2.0 million for the same period in 2022 [165]. - Loan interest income increased by $269,000, or 14.1%, to $2.2 million for the three months ended September 30, 2023, from $1.9 million for the same period in 2022 [166]. - Interest expense increased by $528,000, or 167.9%, to $842,000 for the three months ended September 30, 2023, from $314,000 for the same period in 2022 [169]. - Net interest income decreased by $150,000, or 8.7%, to $1.6 million for the three months ended September 30, 2023, from $1.7 million for the same period in 2022 [172]. - Non-interest income decreased by $132,000 to $228,000 for the three months ended September 30, 2023, primarily due to a $173,000 gain on life insurance proceeds recorded in the prior year [177]. - Total non-interest expenses increased to $1.5 million for the three months ended September 30, 2023, compared to $1.4 million in the same period of 2022, driven by a $59,000 increase in other expenses [179]. - Income tax expense rose to $201,000 for the three months ended September 30, 2023, an increase of $84,000 from $117,000 in the prior year, due to a change in the effective tax rate [180]. - The effective tax rate increased to 70.0% for the three months ended September 30, 2023, compared to 18.6% in the prior year, influenced by changes in Wisconsin tax law [182]. Asset Quality - Total non-performing assets were $2.3 million at September 30, 2023, consistent with the previous quarter, primarily related to real estate owned from a construction loan foreclosure [188]. - The total non-performing assets to total assets ratio was 0.98% at September 30, 2023, compared to 0.97% at June 30, 2023 [187]. - Management's estimates of expected credit losses are based on historical loan losses and current economic conditions, with adjustments for qualitative factors [194]. - The company assesses the allowance for credit losses on a quarterly basis, with potential adjustments based on regulatory reviews and changes in economic conditions [175]. Cash Flow - Net cash provided by operating activities was $367,000 for the three months ended September 30, 2023, compared to $1.5 million for the same period in 2022, indicating a significant decrease [204]. - Net cash used in investing activities was $1.4 million for the three months ended September 30, 2023, down from $5.7 million in the same period of 2022 [204]. - The company had outstanding commitments to originate loans of $7.2 million and $1.2 million in commitments to sell loans as of September 30, 2023 [207]. - Time deposits scheduled to mature in one year or less totaled $53.4 million, including $4.2 million in brokered certificates of deposit [207]. - The company anticipates retaining a substantial portion of maturing time deposits, which may mitigate the need for additional borrowings [205].

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-56269 MARATHON BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 86-2191258 (State ...

Table of Contents Dee UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to ________ Commission File Number: 000-56269 MARATHON BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 86-21 ...

Financial Position - Total assets increased by $16.2 million, or 7.4%, to $236.2 million at December 31, 2022, from $220.0 million at June 30, 2022[138]. - Total deposits increased by $14.9 million, or 7.9%, to $203.0 million at December 31, 2022, from $188.1 million at June 30, 2022[142]. - Total stockholders' equity increased by $477,000, or 1.6%, to $31.2 million at December 31, 2022, from $30.7 million at June 30, 2022[143]. - The allowance for loan losses was $2.1 million at December 31, 2022, down from $2.2 million at December 31, 2021, with the allowance to total loans ratio at 1.06%[182]. - The company had a line of credit of $82.6 million with the Federal Home Loan Bank of Chicago as of December 31, 2022, with no borrowings outstanding[209]. Cash Flow - Net cash provided by operating activities was $962,000 for the six months ended December 31, 2022, compared to $206,000 for the same period in 2021[211]. - Net cash used in investing activities was $4.8 million for the six months ended December 31, 2022, down from $17.8 million in 2021[211]. - Net cash provided by financing activities increased to $14.8 million for the six months ended December 31, 2022, compared to a cash outflow of $1.2 million in 2021[211]. Loan Performance - Net loans increased by $7.0 million, or 3.8%, to $192.6 million at December 31, 2022, driven by a $5.0 million increase in commercial real estate loans[141]. - Non-performing assets decreased to $55,000, or 0.02% of total assets, at December 31, 2022, compared to $115,000, or 0.05% of total assets, at June 30, 2022[182]. - Total non-accrual loans decreased from $64,000 at June 30, 2022, to $55,000 at December 31, 2022, representing a decline of 14.06%[196]. - The total classified loans remained at $0 for both December 31, 2022, and June 30, 2022, indicating no classified loans during this period[198]. - Special mention loans increased slightly from $1,389,000 at June 30, 2022, to $1,471,000 at December 31, 2022, an increase of 5.89%[198]. Income and Expenses - Net income for the three months ended December 31, 2022, was $301,000, an increase of $16,000, or 5.9%, from $285,000 for the same period in 2021[152]. - Net interest income for the six months ended December 31, 2022, was $3,403,000, compared to $3,143,000 for the same period in 2021[148]. - Non-interest income decreased by $97,000 to $193,000 for the three months ended December 31, 2022, primarily due to a $117,000 decrease in mortgage banking income[167]. - Total non-interest expenses increased by $111,000, or 8.0%, to $1.5 million for the three months ended December 31, 2022, compared to $1.4 million for the same period in 2021[169]. - Total non-interest expenses increased by $158,000, or 5.7%, to $2.9 million for the six months ended December 31, 2022, compared to $2.8 million for the same period in 2021[187]. Interest Income and Expense - Interest income increased by $543,000, or 31.9%, to $2.2 million for the three months ended December 31, 2022, compared to $1.7 million for the same period in 2021[153]. - Loan interest income rose by $411,000, or 25.6%, to $2.0 million for the three months ended December 31, 2022, driven by a 30.3% increase in the average balance of the loan portfolio[154]. - Interest expense increased by $326,000, or 143.0%, to $555,000 for the three months ended December 31, 2022, primarily due to a $300,000 increase in interest paid on deposits[158]. - Interest expense for the six months ended December 31, 2022, increased by $407,000, or 87.8%, to $870,000 from $463,000 for the same period in 2021[176]. - Interest expense on deposits increased by $373,000, or 81.9%, to $831,000 for the six months ended December 31, 2022, compared to $457,000 for the same period in 2021[177]. Economic Outlook - The company anticipates potential impacts from inflation and changes in interest rates on margins and loan origination levels[119]. - The primary impact of inflation on operations is reflected in increased operating costs, with interest rates having a more significant impact on performance[219]. - The company monitors its liquidity position daily and expects sufficient funds to meet current funding commitments[212]. Regulatory and Compliance - Marathon Bank was classified as "well capitalized" for regulatory capital purposes as of December 31, 2022[213]. - The allowance for loan losses allocated to commercial real estate was $1,285,009, representing 62.4% of the total allowance at December 31, 2022[208].