Civic Intelligence

First State Bank of Maple Park Old Second Bancorp Inc.

Plan context: Old Second Bancorp Inc. Employees 401K Savings Plan & Trust

EIN 36-3143493 • Aurora, IL • 66 filings • 13 plans

37 S. River St.Aurora, IL 60506-4173
Current Snapshot

Latest Year

2024

2024 Participants

883

2024 Assets

$101,567,525

2024 Contributions

$7,918,852

Historical Graphs

Total Assets Over Time

Aggregate end-of-year assets by filing year, excluding zero-asset years

$101,567,525$50,783,763$0199920122024YearValue
$101,567,525Latest year 2024

Participants Over Time

Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans

8844420199920122024YearValue
883Latest year 2024

Company Timeline

Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.

Year / FilingFilingsParticipantsAssetsContributionsContrib./Participant
20241883$101,567,525$7,918,852$8,968iApproximate average salary by contribution assumption: employee only about $224,203 at 4% or $149,469 at 6%; with 50% employer match about $149,469 at 4% or $99,646 at 6%; with 100% employer match about $112,102 at 4% or $74,734 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-883$101,567,525$7,918,852$8,968iApproximate average salary by contribution assumption: employee only about $224,203 at 4% or $149,469 at 6%; with 50% employer match about $149,469 at 4% or $99,646 at 6%; with 100% employer match about $112,102 at 4% or $74,734 at 6%.
20231848$88,984,579$11,352,957$13,388iApproximate average salary by contribution assumption: employee only about $334,698 at 4% or $223,132 at 6%; with 50% employer match about $223,132 at 4% or $148,755 at 6%; with 100% employer match about $167,349 at 4% or $111,566 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-848$88,984,579$11,352,957$13,388iApproximate average salary by contribution assumption: employee only about $334,698 at 4% or $223,132 at 6%; with 50% employer match about $223,132 at 4% or $148,755 at 6%; with 100% employer match about $167,349 at 4% or $111,566 at 6%.
20221808$75,831,060$6,759,963$8,366iApproximate average salary by contribution assumption: employee only about $209,157 at 4% or $139,438 at 6%; with 50% employer match about $139,438 at 4% or $92,959 at 6%; with 100% employer match about $104,579 at 4% or $69,719 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-808$75,831,060$6,759,963$8,366iApproximate average salary by contribution assumption: employee only about $209,157 at 4% or $139,438 at 6%; with 50% employer match about $139,438 at 4% or $92,959 at 6%; with 100% employer match about $104,579 at 4% or $69,719 at 6%.
20211884$86,412,310$4,358,720$4,931iApproximate average salary by contribution assumption: employee only about $123,267 at 4% or $82,178 at 6%; with 50% employer match about $82,178 at 4% or $54,785 at 6%; with 100% employer match about $61,633 at 4% or $41,089 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-884$86,412,310$4,358,720$4,931iApproximate average salary by contribution assumption: employee only about $123,267 at 4% or $82,178 at 6%; with 50% employer match about $82,178 at 4% or $54,785 at 6%; with 100% employer match about $61,633 at 4% or $41,089 at 6%.
20201530$77,219,757$4,207,138$7,938iApproximate average salary by contribution assumption: employee only about $198,450 at 4% or $132,300 at 6%; with 50% employer match about $132,300 at 4% or $88,200 at 6%; with 100% employer match about $99,225 at 4% or $66,150 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-530$77,219,757$4,207,138$7,938iApproximate average salary by contribution assumption: employee only about $198,450 at 4% or $132,300 at 6%; with 50% employer match about $132,300 at 4% or $88,200 at 6%; with 100% employer match about $99,225 at 4% or $66,150 at 6%.
20191496$70,746,767$3,901,027$7,865iApproximate average salary by contribution assumption: employee only about $196,624 at 4% or $131,083 at 6%; with 50% employer match about $131,083 at 4% or $87,389 at 6%; with 100% employer match about $98,312 at 4% or $65,541 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-496$70,746,767$3,901,027$7,865iApproximate average salary by contribution assumption: employee only about $196,624 at 4% or $131,083 at 6%; with 50% employer match about $131,083 at 4% or $87,389 at 6%; with 100% employer match about $98,312 at 4% or $65,541 at 6%.
20181384$63,482,826$5,006,850$13,039iApproximate average salary by contribution assumption: employee only about $325,967 at 4% or $217,311 at 6%; with 50% employer match about $217,311 at 4% or $144,874 at 6%; with 100% employer match about $162,983 at 4% or $108,656 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-384$63,482,826$5,006,850$13,039iApproximate average salary by contribution assumption: employee only about $325,967 at 4% or $217,311 at 6%; with 50% employer match about $217,311 at 4% or $144,874 at 6%; with 100% employer match about $162,983 at 4% or $108,656 at 6%.
20171430$68,786,602$2,871,057$6,677iApproximate average salary by contribution assumption: employee only about $166,922 at 4% or $111,281 at 6%; with 50% employer match about $111,281 at 4% or $74,188 at 6%; with 100% employer match about $83,461 at 4% or $55,641 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-430$68,786,602$2,871,057$6,677iApproximate average salary by contribution assumption: employee only about $166,922 at 4% or $111,281 at 6%; with 50% employer match about $111,281 at 4% or $74,188 at 6%; with 100% employer match about $83,461 at 4% or $55,641 at 6%.
20161443$60,500,519$3,359,553$7,584iApproximate average salary by contribution assumption: employee only about $189,591 at 4% or $126,394 at 6%; with 50% employer match about $126,394 at 4% or $84,263 at 6%; with 100% employer match about $94,796 at 4% or $63,197 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-443$60,500,519$3,359,553$7,584iApproximate average salary by contribution assumption: employee only about $189,591 at 4% or $126,394 at 6%; with 50% employer match about $126,394 at 4% or $84,263 at 6%; with 100% employer match about $94,796 at 4% or $63,197 at 6%.
20151438$55,236,028$2,056,492$4,695iApproximate average salary by contribution assumption: employee only about $117,380 at 4% or $78,253 at 6%; with 50% employer match about $78,253 at 4% or $52,169 at 6%; with 100% employer match about $58,690 at 4% or $39,127 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-438$55,236,028$2,056,492$4,695iApproximate average salary by contribution assumption: employee only about $117,380 at 4% or $78,253 at 6%; with 50% employer match about $78,253 at 4% or $52,169 at 6%; with 100% employer match about $58,690 at 4% or $39,127 at 6%.
20141473$54,292,565$2,346,739$4,961iApproximate average salary by contribution assumption: employee only about $124,035 at 4% or $82,690 at 6%; with 50% employer match about $82,690 at 4% or $55,127 at 6%; with 100% employer match about $62,017 at 4% or $41,345 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-473$54,292,565$2,346,739$4,961iApproximate average salary by contribution assumption: employee only about $124,035 at 4% or $82,690 at 6%; with 50% employer match about $82,690 at 4% or $55,127 at 6%; with 100% employer match about $62,017 at 4% or $41,345 at 6%.
20131415$51,492,463$1,936,552$4,666iApproximate average salary by contribution assumption: employee only about $116,660 at 4% or $77,773 at 6%; with 50% employer match about $77,773 at 4% or $51,849 at 6%; with 100% employer match about $58,330 at 4% or $38,887 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-415$51,492,463$1,936,552$4,666iApproximate average salary by contribution assumption: employee only about $116,660 at 4% or $77,773 at 6%; with 50% employer match about $77,773 at 4% or $51,849 at 6%; with 100% employer match about $58,330 at 4% or $38,887 at 6%.
20121463$39,146,313$1,891,066$4,084iApproximate average salary by contribution assumption: employee only about $102,109 at 4% or $68,073 at 6%; with 50% employer match about $68,073 at 4% or $45,382 at 6%; with 100% employer match about $51,055 at 4% or $34,036 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-463$39,146,313$1,891,066$4,084iApproximate average salary by contribution assumption: employee only about $102,109 at 4% or $68,073 at 6%; with 50% employer match about $68,073 at 4% or $45,382 at 6%; with 100% employer match about $51,055 at 4% or $34,036 at 6%.
20111473$36,562,662$1,983,227$4,193iApproximate average salary by contribution assumption: employee only about $104,822 at 4% or $69,881 at 6%; with 50% employer match about $69,881 at 4% or $46,587 at 6%; with 100% employer match about $52,411 at 4% or $34,941 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-473$36,562,662$1,983,227$4,193iApproximate average salary by contribution assumption: employee only about $104,822 at 4% or $69,881 at 6%; with 50% employer match about $69,881 at 4% or $46,587 at 6%; with 100% employer match about $52,411 at 4% or $34,941 at 6%.
20104523$43,178,911$2,535,793$4,849iApproximate average salary by contribution assumption: employee only about $121,214 at 4% or $80,809 at 6%; with 50% employer match about $80,809 at 4% or $53,873 at 6%; with 100% employer match about $60,607 at 4% or $40,405 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-523$43,178,911$2,535,793$4,849iApproximate average salary by contribution assumption: employee only about $121,214 at 4% or $80,809 at 6%; with 50% employer match about $80,809 at 4% or $53,873 at 6%; with 100% employer match about $60,607 at 4% or $40,405 at 6%.
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-487---
Old Second Bancorp Long Term Disability Plan-424---
Old Second Bancorp Inc Medical Flexible Spending Account, Dependent Care Flexible Spending Account and Pre-Taxed Premium Plan-118---
20094534$58,959,578$45,515,701$85,235iApproximate average salary by contribution assumption: employee only about $2,130,885 at 4% or $1,420,590 at 6%; with 50% employer match about $1,420,590 at 4% or $947,060 at 6%; with 100% employer match about $1,065,442 at 4% or $710,295 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-534$58,959,578$45,515,701$85,235iApproximate average salary by contribution assumption: employee only about $2,130,885 at 4% or $1,420,590 at 6%; with 50% employer match about $1,420,590 at 4% or $947,060 at 6%; with 100% employer match about $1,065,442 at 4% or $710,295 at 6%.
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-480---
Old Second Bancorp Long Term Disability Plan-441---
Old Second Bancorp Inc Medical Flexible Spending Account, Dependent Care Flexible Spending Account and Pre-Taxed Premium Plan-130---
20084568$58,959,578$45,515,701$80,133iApproximate average salary by contribution assumption: employee only about $2,003,332 at 4% or $1,335,555 at 6%; with 50% employer match about $1,335,555 at 4% or $890,370 at 6%; with 100% employer match about $1,001,666 at 4% or $667,777 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-534$58,959,578$45,515,701$85,235iApproximate average salary by contribution assumption: employee only about $2,130,885 at 4% or $1,420,590 at 6%; with 50% employer match about $1,420,590 at 4% or $947,060 at 6%; with 100% employer match about $1,065,442 at 4% or $710,295 at 6%.
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-568---
Old Second Bancorp Long Term Disability Plan-458---
Old Second Bancorp Inc Medical Flexible Spending Account, Dependent Care Flexible Spending Account and Pre-Taxed Premium Plan-123---
20074523$52,622,979$4,579,504$8,756iApproximate average salary by contribution assumption: employee only about $218,906 at 4% or $145,937 at 6%; with 50% employer match about $145,937 at 4% or $97,291 at 6%; with 100% employer match about $109,453 at 4% or $72,969 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-523$52,622,979$4,579,504$8,756iApproximate average salary by contribution assumption: employee only about $218,906 at 4% or $145,937 at 6%; with 50% employer match about $145,937 at 4% or $97,291 at 6%; with 100% employer match about $109,453 at 4% or $72,969 at 6%.
Old Second Bancorp Inc Medical Flexible Spending Account, Dependent Care Flexible Spending Account and Pre-Taxed Premium Plan-106---
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-519---
Old Second Bancorp Long Term Disability Plan-399---
20065576$53,335,035$9,572,461$16,619iApproximate average salary by contribution assumption: employee only about $415,471 at 4% or $276,981 at 6%; with 50% employer match about $276,981 at 4% or $184,654 at 6%; with 100% employer match about $207,736 at 4% or $138,490 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-536$53,335,035$8,662,533$16,161iApproximate average salary by contribution assumption: employee only about $404,036 at 4% or $269,357 at 6%; with 50% employer match about $269,357 at 4% or $179,572 at 6%; with 100% employer match about $202,018 at 4% or $134,679 at 6%.
Old Second Bancorp Inc Medical Flexible Spending Account, Dependent Care Flexible Spending Account and Pre-Taxed Premium Plan-92---
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-576---
Old Second Bancorp Long Term Disability Plan-415---
Maple Park Bancshares Inc. Employee Stock Ownership Plan-0-$909,928-
20054526$60,687,910$5,557,782$10,566iApproximate average salary by contribution assumption: employee only about $264,153 at 4% or $176,102 at 6%; with 50% employer match about $176,102 at 4% or $117,401 at 6%; with 100% employer match about $132,077 at 4% or $88,051 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-515$46,765,982$3,411,084$6,623iApproximate average salary by contribution assumption: employee only about $165,587 at 4% or $110,391 at 6%; with 50% employer match about $110,391 at 4% or $73,594 at 6%; with 100% employer match about $82,793 at 4% or $55,196 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-432$13,921,928$2,146,698$4,969iApproximate average salary by contribution assumption: employee only about $124,230 at 4% or $82,820 at 6%; with 50% employer match about $82,820 at 4% or $55,213 at 6%; with 100% employer match about $62,115 at 4% or $41,410 at 6%.
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-526---
Old Second Bancorp Long Term Disability Plan-411---
20044534$60,534,882$5,247,269$9,826iApproximate average salary by contribution assumption: employee only about $245,659 at 4% or $163,772 at 6%; with 50% employer match about $163,772 at 4% or $109,182 at 6%; with 100% employer match about $122,829 at 4% or $81,886 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-534$48,367,872$3,117,761$5,839iApproximate average salary by contribution assumption: employee only about $145,963 at 4% or $97,308 at 6%; with 50% employer match about $97,308 at 4% or $64,872 at 6%; with 100% employer match about $72,981 at 4% or $48,654 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-425$12,167,010$2,129,508$5,011iApproximate average salary by contribution assumption: employee only about $125,265 at 4% or $83,510 at 6%; with 50% employer match about $83,510 at 4% or $55,673 at 6%; with 100% employer match about $62,633 at 4% or $41,755 at 6%.
Old Second Bancorp Long Term Disability Plan-386---
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-519---
20034536$49,254,204$4,627,370$8,633iApproximate average salary by contribution assumption: employee only about $215,829 at 4% or $143,886 at 6%; with 50% employer match about $143,886 at 4% or $95,924 at 6%; with 100% employer match about $107,914 at 4% or $71,943 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-536$38,857,892$2,957,972$5,519iApproximate average salary by contribution assumption: employee only about $137,965 at 4% or $91,977 at 6%; with 50% employer match about $91,977 at 4% or $61,318 at 6%; with 100% employer match about $68,983 at 4% or $45,988 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-431$10,396,312$1,669,398$3,873iApproximate average salary by contribution assumption: employee only about $96,833 at 4% or $64,555 at 6%; with 50% employer match about $64,555 at 4% or $43,037 at 6%; with 100% employer match about $48,416 at 4% or $32,278 at 6%.
Old Second Bancorp Long Term Disability Plan-376---
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-520---
20024537$37,475,963$4,073,838$7,586iApproximate average salary by contribution assumption: employee only about $189,657 at 4% or $126,438 at 6%; with 50% employer match about $126,438 at 4% or $84,292 at 6%; with 100% employer match about $94,829 at 4% or $63,219 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-537$29,440,513$2,863,444$5,332iApproximate average salary by contribution assumption: employee only about $133,307 at 4% or $88,872 at 6%; with 50% employer match about $88,872 at 4% or $59,248 at 6%; with 100% employer match about $66,654 at 4% or $44,436 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-376$8,035,450$1,210,394$3,219iApproximate average salary by contribution assumption: employee only about $80,478 at 4% or $53,652 at 6%; with 50% employer match about $53,652 at 4% or $35,768 at 6%; with 100% employer match about $40,239 at 4% or $26,826 at 6%.
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-531---
Old Second Bancorp Long Term Disability Plan-357---
20015502$28,548,045$2,180,871$4,344iApproximate average salary by contribution assumption: employee only about $108,609 at 4% or $72,406 at 6%; with 50% employer match about $72,406 at 4% or $48,271 at 6%; with 100% employer match about $54,305 at 4% or $36,203 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-502$28,548,045$1,406,175$2,801iApproximate average salary by contribution assumption: employee only about $70,029 at 4% or $46,686 at 6%; with 50% employer match about $46,686 at 4% or $31,124 at 6%; with 100% employer match about $35,014 at 4% or $23,343 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-0---
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-486---
Old Second Bancorp Long Term Disability Plan-338---
Old Second Bancorp Inc. Employees Profit Sharing Plan & Trust-0-$774,696-
20005476$21,647,912$1,655,796$3,479iApproximate average salary by contribution assumption: employee only about $86,964 at 4% or $57,976 at 6%; with 50% employer match about $57,976 at 4% or $38,651 at 6%; with 100% employer match about $43,482 at 4% or $28,988 at 6%.
Old Second Bancorp Inc. Employees Profit Sharing Plan & Trust-387$13,343,332$622,102$1,607iApproximate average salary by contribution assumption: employee only about $40,187 at 4% or $26,792 at 6%; with 50% employer match about $26,792 at 4% or $17,861 at 6%; with 100% employer match about $20,094 at 4% or $13,396 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-476$8,303,901$1,033,694$2,172iApproximate average salary by contribution assumption: employee only about $54,291 at 4% or $36,194 at 6%; with 50% employer match about $36,194 at 4% or $24,129 at 6%; with 100% employer match about $27,145 at 4% or $18,097 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-0$679--
Old Second Bancorp Long Term Disability Plan-308---
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-463---
19995497$23,865,115$1,409,980$2,837iApproximate average salary by contribution assumption: employee only about $70,925 at 4% or $47,283 at 6%; with 50% employer match about $47,283 at 4% or $31,522 at 6%; with 100% employer match about $35,462 at 4% or $23,642 at 6%.
Old Second Bancorp Inc. Employees Profit Sharing Plan & Trust-402$15,629,847$544,304$1,354iApproximate average salary by contribution assumption: employee only about $33,850 at 4% or $22,567 at 6%; with 50% employer match about $22,567 at 4% or $15,044 at 6%; with 100% employer match about $16,925 at 4% or $11,283 at 6%.
Old Second Bancorp Inc. Employees 401K Savings Plan & Trust-402$8,196,103$865,676$2,153iApproximate average salary by contribution assumption: employee only about $53,836 at 4% or $35,890 at 6%; with 50% employer match about $35,890 at 4% or $23,927 at 6%; with 100% employer match about $26,918 at 4% or $17,945 at 6%.
Maple Park Bancshares Inc. Employee Stock Ownership Plan-0$39,165--
Old Second Bancorp Inc Group Medical, Dental & Life Insurance Plan-497---
Old Second Bancorp Long Term Disability Plan-312---