Current Snapshot
Latest Year
2024
2024 Participants
312
2024 Assets
$266,070,379
2024 Contributions
$50,000,000
Historical Graphs
Total Assets Over Time
Aggregate end-of-year assets by filing year, excluding zero-asset years
Participants Over Time
Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans
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 / Filing | Filings | Participants | Assets | Contributions | Contrib./Participant |
|---|---|---|---|---|---|
| 2024 | 1 | 312 | $266,070,379 | $0 | - |
| Ies Retirement Plan | - | 312 | $266,070,379 | - | - |
| 2023 | 1 | 344 | $272,628,232 | $0 | - |
| Ies Retirement Plan | - | 344 | $272,628,232 | - | - |
| 2022 | 1 | 361 | $264,463,778 | $50,000,000 | $138,504iApproximate average salary by contribution assumption: employee only about $3,462,604 at 4% or $2,308,403 at 6%; with 50% employer match about $2,308,403 at 4% or $1,538,935 at 6%; with 100% employer match about $1,731,302 at 4% or $1,154,201 at 6%. |
| Ies Retirement Plan | - | 361 | $264,463,778 | $50,000,000 | $138,504iApproximate average salary by contribution assumption: employee only about $3,462,604 at 4% or $2,308,403 at 6%; with 50% employer match about $2,308,403 at 4% or $1,538,935 at 6%; with 100% employer match about $1,731,302 at 4% or $1,154,201 at 6%. |
| 2021 | 1 | 447 | $346,259,597 | $0 | - |
| Ies Retirement Plan | - | 447 | $346,259,597 | - | - |
| 2020 | 1 | 488 | $353,005,323 | $27,912,630 | $57,198iApproximate average salary by contribution assumption: employee only about $1,429,950 at 4% or $953,300 at 6%; with 50% employer match about $953,300 at 4% or $635,533 at 6%; with 100% employer match about $714,975 at 4% or $476,650 at 6%. |
| Ies Retirement Plan | - | 488 | $353,005,323 | $27,912,630 | $57,198iApproximate average salary by contribution assumption: employee only about $1,429,950 at 4% or $953,300 at 6%; with 50% employer match about $953,300 at 4% or $635,533 at 6%; with 100% employer match about $714,975 at 4% or $476,650 at 6%. |
| 2019 | 1 | 569 | $328,748,147 | $17,931,249 | $31,514iApproximate average salary by contribution assumption: employee only about $787,840 at 4% or $525,227 at 6%; with 50% employer match about $525,227 at 4% or $350,151 at 6%; with 100% employer match about $393,920 at 4% or $262,613 at 6%. |
| Ies Retirement Plan | - | 569 | $328,748,147 | $17,931,249 | $31,514iApproximate average salary by contribution assumption: employee only about $787,840 at 4% or $525,227 at 6%; with 50% employer match about $525,227 at 4% or $350,151 at 6%; with 100% employer match about $393,920 at 4% or $262,613 at 6%. |
| 2018 | 1 | 663 | $280,158,805 | $9,250,270 | $13,952iApproximate average salary by contribution assumption: employee only about $348,804 at 4% or $232,536 at 6%; with 50% employer match about $232,536 at 4% or $155,024 at 6%; with 100% employer match about $174,402 at 4% or $116,268 at 6%. |
| Ies Retirement Plan | - | 663 | $280,158,805 | $9,250,270 | $13,952iApproximate average salary by contribution assumption: employee only about $348,804 at 4% or $232,536 at 6%; with 50% employer match about $232,536 at 4% or $155,024 at 6%; with 100% employer match about $174,402 at 4% or $116,268 at 6%. |
| 2017 | 1 | 724 | $322,195,158 | $18,873 | $26iApproximate average salary by contribution assumption: employee only about $652 at 4% or $434 at 6%; with 50% employer match about $434 at 4% or $290 at 6%; with 100% employer match about $326 at 4% or $217 at 6%. |
| Ies Retirement Plan | - | 724 | $322,195,158 | $18,873 | $26iApproximate average salary by contribution assumption: employee only about $652 at 4% or $434 at 6%; with 50% employer match about $434 at 4% or $290 at 6%; with 100% employer match about $326 at 4% or $217 at 6%. |
| 2016 | 1 | 782 | $305,803,908 | $17,280 | $22iApproximate average salary by contribution assumption: employee only about $552 at 4% or $368 at 6%; with 50% employer match about $368 at 4% or $246 at 6%; with 100% employer match about $276 at 4% or $184 at 6%. |
| Ies Retirement Plan | - | 782 | $305,803,908 | $17,280 | $22iApproximate average salary by contribution assumption: employee only about $552 at 4% or $368 at 6%; with 50% employer match about $368 at 4% or $246 at 6%; with 100% employer match about $276 at 4% or $184 at 6%. |
| 2015 | 1 | 830 | $303,016,803 | $3,895 | $5iApproximate average salary by contribution assumption: employee only about $117 at 4% or $78 at 6%; with 50% employer match about $78 at 4% or $52 at 6%; with 100% employer match about $59 at 4% or $39 at 6%. |
| Ies Retirement Plan | - | 830 | $303,016,803 | $3,895 | $5iApproximate average salary by contribution assumption: employee only about $117 at 4% or $78 at 6%; with 50% employer match about $78 at 4% or $52 at 6%; with 100% employer match about $59 at 4% or $39 at 6%. |
| 2014 | 1 | 915 | $345,709,254 | $21,383 | $23iApproximate average salary by contribution assumption: employee only about $584 at 4% or $389 at 6%; with 50% employer match about $389 at 4% or $260 at 6%; with 100% employer match about $292 at 4% or $195 at 6%. |
| Ies Retirement Plan | - | 915 | $345,709,254 | $21,383 | $23iApproximate average salary by contribution assumption: employee only about $584 at 4% or $389 at 6%; with 50% employer match about $389 at 4% or $260 at 6%; with 100% employer match about $292 at 4% or $195 at 6%. |
| 2013 | 1 | 984 | $345,040,329 | $10,141 | $10iApproximate average salary by contribution assumption: employee only about $258 at 4% or $172 at 6%; with 50% employer match about $172 at 4% or $115 at 6%; with 100% employer match about $129 at 4% or $86 at 6%. |
| Ies Retirement Plan | - | 984 | $345,040,329 | $10,141 | $10iApproximate average salary by contribution assumption: employee only about $258 at 4% or $172 at 6%; with 50% employer match about $172 at 4% or $115 at 6%; with 100% employer match about $129 at 4% or $86 at 6%. |
| 2012 | 1 | 1,036 | $327,465,115 | $7,510 | $7iApproximate average salary by contribution assumption: employee only about $181 at 4% or $121 at 6%; with 50% employer match about $121 at 4% or $81 at 6%; with 100% employer match about $91 at 4% or $60 at 6%. |
| Ies Retirement Plan | - | 1,036 | $327,465,115 | $7,510 | $7iApproximate average salary by contribution assumption: employee only about $181 at 4% or $121 at 6%; with 50% employer match about $121 at 4% or $81 at 6%; with 100% employer match about $91 at 4% or $60 at 6%. |
| 2011 | 1 | 1,089 | $305,929,100 | $50,007,510 | $45,921iApproximate average salary by contribution assumption: employee only about $1,148,014 at 4% or $765,343 at 6%; with 50% employer match about $765,343 at 4% or $510,229 at 6%; with 100% employer match about $574,007 at 4% or $382,671 at 6%. |
| Ies Retirement Plan | - | 1,089 | $305,929,100 | $50,007,510 | $45,921iApproximate average salary by contribution assumption: employee only about $1,148,014 at 4% or $765,343 at 6%; with 50% employer match about $765,343 at 4% or $510,229 at 6%; with 100% employer match about $574,007 at 4% or $382,671 at 6%. |
| 2010 | 1 | 1,134 | $264,244,773 | $7,510 | $7iApproximate average salary by contribution assumption: employee only about $166 at 4% or $110 at 6%; with 50% employer match about $110 at 4% or $74 at 6%; with 100% employer match about $83 at 4% or $55 at 6%. |
| Ies Retirement Plan | - | 1,134 | $264,244,773 | $7,510 | $7iApproximate average salary by contribution assumption: employee only about $166 at 4% or $110 at 6%; with 50% employer match about $110 at 4% or $74 at 6%; with 100% employer match about $83 at 4% or $55 at 6%. |
| 2009 | 2 | 1,182 | $250,639,203 | $31,762,808 | $26,872iApproximate average salary by contribution assumption: employee only about $671,802 at 4% or $447,868 at 6%; with 50% employer match about $447,868 at 4% or $298,579 at 6%; with 100% employer match about $335,901 at 4% or $223,934 at 6%. |
| Ies Retirement Plan | - | 1,182 | $250,639,203 | $23,816,760 | $20,150iApproximate average salary by contribution assumption: employee only about $503,739 at 4% or $335,826 at 6%; with 50% employer match about $335,826 at 4% or $223,884 at 6%; with 100% employer match about $251,869 at 4% or $167,913 at 6%. |
| IP&L RET PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 0 | - | $7,946,048 | - |
| 2008 | 2 | 841 | $193,407,895 | $21,856,549 | $25,989iApproximate average salary by contribution assumption: employee only about $649,719 at 4% or $433,146 at 6%; with 50% employer match about $433,146 at 4% or $288,764 at 6%; with 100% employer match about $324,860 at 4% or $216,573 at 6%. |
| Ies Retirement Plan | - | 841 | $136,234,266 | $16,510,501 | $19,632iApproximate average salary by contribution assumption: employee only about $490,800 at 4% or $327,200 at 6%; with 50% employer match about $327,200 at 4% or $218,133 at 6%; with 100% employer match about $245,400 at 4% or $163,600 at 6%. |
| IP&L RET PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 361 | $57,173,629 | $5,346,048 | $14,809iApproximate average salary by contribution assumption: employee only about $370,225 at 4% or $246,817 at 6%; with 50% employer match about $246,817 at 4% or $164,544 at 6%; with 100% employer match about $185,112 at 4% or $123,408 at 6%. |
| 2007 | 2 | 867 | $257,471,798 | $0 | - |
| Ies Retirement Plan | - | 867 | $180,167,517 | - | - |
| IP&L RET PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 411 | $77,304,281 | - | - |
| 2006 | 2 | 867 | $252,097,345 | $26,000,000 | $29,988iApproximate average salary by contribution assumption: employee only about $749,712 at 4% or $499,808 at 6%; with 50% employer match about $499,808 at 4% or $333,205 at 6%; with 100% employer match about $374,856 at 4% or $249,904 at 6%. |
| Ies Retirement Plan | - | 867 | $176,583,197 | $26,000,000 | $29,988iApproximate average salary by contribution assumption: employee only about $749,712 at 4% or $499,808 at 6%; with 50% employer match about $499,808 at 4% or $333,205 at 6%; with 100% employer match about $374,856 at 4% or $249,904 at 6%. |
| IP&L RET PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 420 | $75,514,148 | - | - |
| 2005 | 4 | 1,057 | $147,293,177 | $0 | - |
| Ies Retirement Plan | - | 1,057 | $147,293,177 | - | - |
| IPC MED.& LIFE PLAN- FOR RETIREES REPRESENTED BY A COLLECTIVE BARGAINING AGREEMENT | - | 0 | - | - | - |
| Ies Health Care Plan | - | 0 | - | - | - |
| IPC MED. & LIFE PLAN FOR RETIREES NOT REPRESENTED BY BARGAINING AGREEMENT | - | 0 | - | - | - |
| 2004 | 5 | 2,851 | $275,689,021 | $29,550,454 | $10,365iApproximate average salary by contribution assumption: employee only about $259,124 at 4% or $172,749 at 6%; with 50% employer match about $172,749 at 4% or $115,166 at 6%; with 100% employer match about $129,562 at 4% or $86,375 at 6%. |
| Ies Retirement Plan | - | 1,121 | $147,445,697 | $2,069,676 | $1,846iApproximate average salary by contribution assumption: employee only about $46,157 at 4% or $30,771 at 6%; with 50% employer match about $30,771 at 4% or $20,514 at 6%; with 100% employer match about $23,078 at 4% or $15,386 at 6%. |
| IP&L RET PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 473 | $54,667,437 | $2,138,264 | $4,521iApproximate average salary by contribution assumption: employee only about $113,016 at 4% or $75,344 at 6%; with 50% employer match about $75,344 at 4% or $50,229 at 6%; with 100% employer match about $56,508 at 4% or $37,672 at 6%. |
| Ies Health Care Plan | - | 2,851 | $51,402,989 | $20,619,720 | $7,232iApproximate average salary by contribution assumption: employee only about $180,811 at 4% or $120,541 at 6%; with 50% employer match about $120,541 at 4% or $80,361 at 6%; with 100% employer match about $90,406 at 4% or $60,270 at 6%. |
| IPC MED. & LIFE PLAN-FOR RETIREES REPRESENTED BY A COLLECTIVE BARGAINING AGREEMENT | - | 0 | $18,093,133 | $3,795,193 | - |
| IPC MED. & LIFE PLAN FOR RETIREES NOT REPRESENTED BY BARGAINING AGREEMENT | - | 276 | $4,079,765 | $927,601 | $3,361iApproximate average salary by contribution assumption: employee only about $84,022 at 4% or $56,015 at 6%; with 50% employer match about $56,015 at 4% or $37,343 at 6%; with 100% employer match about $42,011 at 4% or $28,007 at 6%. |
| 2003 | 5 | 2,791 | $251,086,297 | $45,746,001 | $16,391iApproximate average salary by contribution assumption: employee only about $409,764 at 4% or $273,176 at 6%; with 50% employer match about $273,176 at 4% or $182,117 at 6%; with 100% employer match about $204,882 at 4% or $136,588 at 6%. |
| Ies Retirement Plan | - | 1,150 | $137,717,048 | $8,117,000 | $7,058iApproximate average salary by contribution assumption: employee only about $176,457 at 4% or $117,638 at 6%; with 50% employer match about $117,638 at 4% or $78,425 at 6%; with 100% employer match about $88,228 at 4% or $58,819 at 6%. |
| IP&L RET PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 479 | $49,061,049 | $8,725,274 | $18,216iApproximate average salary by contribution assumption: employee only about $455,390 at 4% or $303,593 at 6%; with 50% employer match about $303,593 at 4% or $202,396 at 6%; with 100% employer match about $227,695 at 4% or $151,797 at 6%. |
| Ies Health Care Plan | - | 2,791 | $44,506,397 | $24,503,563 | $8,779iApproximate average salary by contribution assumption: employee only about $219,487 at 4% or $146,325 at 6%; with 50% employer match about $146,325 at 4% or $97,550 at 6%; with 100% employer match about $109,744 at 4% or $73,162 at 6%. |
| INTERSTATE POWER COMPANY MEDICAL AND LIFE PLAN FOR RETIREES REPRESENTED BY A COLLECTIVE BARGAINING AGREEMENT | - | 333 | $15,260,258 | $2,912,512 | $8,746iApproximate average salary by contribution assumption: employee only about $218,657 at 4% or $145,771 at 6%; with 50% employer match about $145,771 at 4% or $97,181 at 6%; with 100% employer match about $109,329 at 4% or $72,886 at 6%. |
| INTERSTATE POWER COMPANY MEDICAL AND LIFE PLAN FOR RETIREES NOT REPRESENTED BY A COLLECTIVE BARGAINING AGREEMENT | - | 287 | $4,541,545 | $1,487,652 | $5,183iApproximate average salary by contribution assumption: employee only about $129,586 at 4% or $86,391 at 6%; with 50% employer match about $86,391 at 4% or $57,594 at 6%; with 100% employer match about $64,793 at 4% or $43,195 at 6%. |
| 2002 | 5 | 3,000 | $198,966,831 | $27,331,972 | $9,111iApproximate average salary by contribution assumption: employee only about $227,766 at 4% or $151,844 at 6%; with 50% employer match about $151,844 at 4% or $101,230 at 6%; with 100% employer match about $113,883 at 4% or $75,922 at 6%. |
| Ies Retirement Plan | - | 1,156 | $112,556,051 | - | - |
| Ies Health Care Plan | - | 3,000 | $35,156,807 | $20,959,012 | $6,986iApproximate average salary by contribution assumption: employee only about $174,658 at 4% or $116,439 at 6%; with 50% employer match about $116,439 at 4% or $77,626 at 6%; with 100% employer match about $87,329 at 4% or $58,219 at 6%. |
| INTERSTATE POWER AND LIGHT RETIREMENT PLAN FOR IPC BARGAINING UNIT EMPLOYEES | - | 477 | $34,707,603 | $2,693,000 | $5,646iApproximate average salary by contribution assumption: employee only about $141,143 at 4% or $94,095 at 6%; with 50% employer match about $94,095 at 4% or $62,730 at 6%; with 100% employer match about $70,571 at 4% or $47,048 at 6%. |
| INTERSTATE POWER COMPANY RETIREE MED & LIFE FOR COLLECTIVE BARGAINING AGREEMENT | - | 246 | $12,371,899 | $2,569,180 | $10,444iApproximate average salary by contribution assumption: employee only about $261,096 at 4% or $174,064 at 6%; with 50% employer match about $174,064 at 4% or $116,042 at 6%; with 100% employer match about $130,548 at 4% or $87,032 at 6%. |
| INTERSTATE POWER COMPANY RETIREE MED & LIFE FOR NON-COLLECTIVE BARGAINING AGREEMENT | - | 293 | $4,174,471 | $1,110,780 | $3,791iApproximate average salary by contribution assumption: employee only about $94,776 at 4% or $63,184 at 6%; with 50% employer match about $63,184 at 4% or $42,123 at 6%; with 100% employer match about $47,388 at 4% or $31,592 at 6%. |
| 2001 | 5 | 2,465 | $220,162,568 | $21,640,313 | $8,779iApproximate average salary by contribution assumption: employee only about $219,476 at 4% or $146,317 at 6%; with 50% employer match about $146,317 at 4% or $97,545 at 6%; with 100% employer match about $109,738 at 4% or $73,159 at 6%. |
| Ies Retirement Plan | - | 1,135 | $130,518,141 | - | - |
| Ies Retirement Plan | - | 490 | $36,057,367 | - | - |
| Ies Health Care Plan | - | 2,465 | $35,998,765 | $19,195,313 | $7,787iApproximate average salary by contribution assumption: employee only about $194,679 at 4% or $129,786 at 6%; with 50% employer match about $129,786 at 4% or $86,524 at 6%; with 100% employer match about $97,339 at 4% or $64,893 at 6%. |
| INTERSTATE POWER COMPANY RETIREE MED & LIFE FOR COLLECTIVE BARGAINING AGREEMENT | - | 0 | $12,377,340 | $1,844,497 | - |
| INTERSTATE POWER COMPANY RETIREE MED & LIFE FOR NON COLLECTIVE BARGAINING AGREEMENT | - | 0 | $5,210,955 | $600,503 | - |
| 2000 | 2 | 2,720 | $38,823,129 | $15,153,700 | $5,571iApproximate average salary by contribution assumption: employee only about $139,280 at 4% or $92,854 at 6%; with 50% employer match about $92,854 at 4% or $61,902 at 6%; with 100% employer match about $69,640 at 4% or $46,427 at 6%. |
| Ies Health Care Plan | - | 2,720 | $38,823,129 | $15,153,700 | $5,571iApproximate average salary by contribution assumption: employee only about $139,280 at 4% or $92,854 at 6%; with 50% employer match about $92,854 at 4% or $61,902 at 6%; with 100% employer match about $69,640 at 4% or $46,427 at 6%. |
| Ies Retirement Plan | - | 1,134 | - | - | - |
| 1999 | 3 | 2,289 | $173,775,954 | $14,858,259 | $6,491iApproximate average salary by contribution assumption: employee only about $162,279 at 4% or $108,186 at 6%; with 50% employer match about $108,186 at 4% or $72,124 at 6%; with 100% employer match about $81,139 at 4% or $54,093 at 6%. |
| Ies Retirement Plan | - | 1,134 | $134,044,636 | - | - |
| Ies Health Care Plan | - | 2,289 | $36,491,668 | $14,858,259 | $6,491iApproximate average salary by contribution assumption: employee only about $162,279 at 4% or $108,186 at 6%; with 50% employer match about $108,186 at 4% or $72,124 at 6%; with 100% employer match about $81,139 at 4% or $54,093 at 6%. |
| Ies Employee Stock Ownership Plan | - | 181 | $3,239,650 | - | - |