Employers › Alliant Energy Corporate Services
Recordkeeping fees per participant · Alliant Energy Corporation 401(k) Savings Plan · plan year 2024
$77.99
Higher than 97% of the 790 plans over $1B that report it.
= $328,898 / 4,217
Schedule H, line 2i(3); OTH_RECORDKEEPING_FEES_AMT pos 160; filing 20251015103338NAL0002151443001, received 2025-10-15
participants_with_balance: Form 5500, line 6g(2); PARTCP_ACCOUNT_BAL_CNT pos 78; filing 20251015103338NAL0002151443001, received 2025-10-15
Percentiles compare this plan with the Schedule H plans over $1B in assets of the same plan year, excluding final filings; shown only where at least 50 comparable plans report the figure. Plan year 2024-01-01 to 2024-12-31, filing received 2025-10-15.
Administrative expenses excluding investment management, per participant
$77.99
Higher than 83% of the 1,045 plans over $1B that report it.
= $328,898 / 4,217
derived, admin_expenses (2i(12)) minus invst_mgmt_fees (2i(5)), floored at 0; filing 20251015103338NAL0002151443001, received 2025-10-15
participants_with_balance: Form 5500, line 6g(2); PARTCP_ACCOUNT_BAL_CNT pos 78; filing 20251015103338NAL0002151443001, received 2025-10-15
Administrative expenses per participant
$218.81
Higher than 94% of the 1,076 plans over $1B that report it.
= $922,730 / 4,217
Schedule H, line 2i(12) total administrative expenses; TOT_ADMIN_EXPENSES_AMT pos 109; filing 20251015103338NAL0002151443001, received 2025-10-15
participants_with_balance: Form 5500, line 6g(2); PARTCP_ACCOUNT_BAL_CNT pos 78; filing 20251015103338NAL0002151443001, received 2025-10-15
Administrative expenses as a share of assets
0.065%
Higher than 69% of the 1,076 plans over $1B that report it.
= $922,730 / $1,409,016,019
Schedule H, line 2i(12) total administrative expenses; TOT_ADMIN_EXPENSES_AMT pos 109; filing 20251015103338NAL0002151443001, received 2025-10-15
assets_eoy: Schedule H, Part I line 1f col (b); TOT_ASSETS_EOY_AMT pos 61; filing 20251015103338NAL0002151443001, received 2025-10-15
Employer contributions per participant
$7,374
Higher than 84% of the 1,135 plans over $1B that report it.
= $31,097,640 / 4,217
Schedule H, Part II line 2a(1)(A); EMPLR_CONTRIB_INCOME_AMT pos 68; filing 20251015103338NAL0002151443001, received 2025-10-15
participants_with_balance: Form 5500, line 6g(2); PARTCP_ACCOUNT_BAL_CNT pos 78; filing 20251015103338NAL0002151443001, received 2025-10-15
Employer share of total contributions
38.1%
Higher than 68% of the 1,135 plans over $1B that report it.
= $31,097,640 / $81,604,022
Schedule H, Part II line 2a(1)(A); EMPLR_CONTRIB_INCOME_AMT pos 68; filing 20251015103338NAL0002151443001, received 2025-10-15
total_contrib: Schedule H, line 2a(3); TOT_CONTRIB_AMT pos 72; filing 20251015103338NAL0002151443001, received 2025-10-15
Plan terms are not published in public filings.
2A age/service-weighted · 2E profit-sharing · 2F ERISA 404(c) plan · 2H partially participant-directed · 2J 401(k) feature · 2K 401(m) arrangement · 2O ESOP-related feature · 2R participant brokerage window · 2S pre-approved plan document · 2T default investment (QDIA) · 3H controlled-group sponsor · Form 5500, line 8a; TYPE_PENSION_BNFT_CODE pos 81; filing 20251015103338NAL0002151443001, received 2025-10-15
| Field | Value | Source |
|---|---|---|
| Plan sponsor | ALLIANT ENERGY CORPORATE SERVICES, INC. | Form 5500, Part II line 2a; SPONSOR_DFE_NAME pos 19; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Plan name | ALLIANT ENERGY CORPORATION 401(K) SAVINGS PLAN | Form 5500, line 1a; PLAN_NAME pos 16; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Sponsor EIN / plan number | 39-1914946 / 005 | Form 5500, line 2b; SPONS_DFE_EIN pos 44; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Plan type | single-employer | Form 5500, Part I line A; TYPE_PLAN_ENTITY_CD pos 4; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Sponsor location | MADISON, WI | Form 5500, line 2a; SPONS_DFE_MAIL_US_STATE pos 25; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Industry (business code) | 221100, Utilities | Form 5500, line 2d; BUSINESS_CODE pos 46; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Plan year | 2024-01-01 to 2024-12-31 | Form 5500, Part I plan year; FORM_PLAN_YEAR_BEGIN_DATE pos 2; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Filing received | 2025-10-15 | Form 5500, EFAST2 receipt date; DATE_RECEIVED pos 102; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Final filing | no | Form 5500, Part I line B; FINAL_FILING_IND pos 8; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Amended filing | no | Form 5500, Part I line B; AMENDED_IND pos 7; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Participants, beginning of year | 4,517 | Form 5500, line 5; TOT_PARTCP_BOY_CNT pos 71; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Active participants | 2,987 | Form 5500, line 6a(2); TOT_ACTIVE_PARTCP_CNT pos 72; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Participants, end of year | 4,222 | Form 5500, line 6f; TOT_ACT_RTD_SEP_BENEF_CNT pos 77; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Participants with an account balance | 4,217 | Form 5500, line 6g(2); PARTCP_ACCOUNT_BAL_CNT pos 78; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Total assets, beginning of year | $1,321,177,371 | Schedule H, Part I line 1f col (a); TOT_ASSETS_BOY_AMT pos 30; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Total assets, end of year | $1,409,016,019 | Schedule H, Part I line 1f col (b); TOT_ASSETS_EOY_AMT pos 61; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Net assets, end of year | $1,409,016,019 | Schedule H, line 1l col (b); NET_ASSETS_EOY_AMT pos 67; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Total income | $280,164,379 | Schedule H, Part II line 2d; TOT_INCOME_AMT pos 97; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Net income | $87,838,648 | Schedule H, line 2k; NET_INCOME_AMT pos 111; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Employer contributions | $31,097,640 | Schedule H, Part II line 2a(1)(A); EMPLR_CONTRIB_INCOME_AMT pos 68; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Participant contributions | $44,950,392 | Schedule H, line 2a(1)(B); PARTICIPANT_CONTRIB_AMT pos 69; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Other contributions (incl. rollovers) | $5,555,990 | Schedule H, line 2a(1)(C); OTH_CONTRIB_RCVD_AMT pos 70; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Total contributions | $81,604,022 | Schedule H, line 2a(3); TOT_CONTRIB_AMT pos 72; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Benefit payments | $191,647,485 | Schedule H, line 2e(4); TOT_DISTRIB_BNFT_AMT pos 101; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Total expenses (incl. benefit payments) | $192,325,731 | Schedule H, line 2j; TOT_EXPENSES_AMT pos 110; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Total administrative expenses | $922,730 | Schedule H, line 2i(12) total administrative expenses; TOT_ADMIN_EXPENSES_AMT pos 109; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Recordkeeping fees | $328,898 | Schedule H, line 2i(3); OTH_RECORDKEEPING_FEES_AMT pos 160; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Investment advisory and management fees | $593,832 | Schedule H, line 2i(5); INVST_MGMT_FEES_AMT pos 107; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Administrative expenses excluding investment management | $328,898 | derived, admin_expenses (2i(12)) minus invst_mgmt_fees (2i(5)), floored at 0; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Held in common/collective trusts | $940,423,406 | Schedule H, line 1c(9) col (b); INT_COMMON_TR_EOY_AMT pos 51; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Held in mutual funds | $340,357,976 | Schedule H, line 1c(13) col (b); INT_REG_INVST_CO_EOY_AMT pos 55; filing 20251015103338NAL0002151443001, received 2025-10-15 |
| Independent auditor | DELOITTE & TOUCHE LLP | Schedule H, Part III line 3a; ACCOUNTANT_FIRM_NAME pos 116; filing 20251015103338NAL0002151443001, received 2025-10-15 |
Position = column in the DOL layout for form year 2024. Filing 20251015103338NAL0002151443001, received 2025-10-15.
| Provider | Relationship | Service codes | Direct compensation | Indirect |
|---|---|---|---|---|
| EMPOWER ADVISORY GROUP, LLC | NONE | 28 Investment management; 50 Direct payment from the plan | $611,240 | no |
| EMPOWER ANNUITY INS CO OF AMERICArecordkeeper | NONE | 15 Recordkeeping and information management; 50 Direct payment from the plan; 64 Recordkeeping fees | $291,753 | yes |
| FIDELITY INVESTMENTS INST CO, LLCrecordkeeper | RECORDKEEPER | 37 Participant loan processing; 64 Recordkeeping fees; 65 Account maintenance fees; 71 Securities brokerage commissions and fees; 50 Direct payment from the plan | $37,145 | no |
| STRATEGIC ADVISORS, INC. | ADVISOR | 27 Investment advisory (plan); 50 Direct payment from the plan | $22,171 | no |
| CHARLES SCHWAB & CO., INC. | NONE | 50 Direct payment from the plan; 59 Shareholder servicing fees | $180 | yes |
Schedule C Part I line 2: name (a), service codes (b), relationship (c), direct compensation paid by the plan (d), indirect compensation received (e). Filing 20251015103338NAL0002151443001, received 2025-10-15.
| Figure | 2023 | 2024 | Change |
|---|---|---|---|
| Total assets | $1,321,177,371 | $1,409,016,019 | 6.6% |
| Participants with a balance | 4,494 | 4,217 | -6.2% |
| Administrative expenses | $889,364 | $922,730 | 3.8% |
| Recordkeeping fees per participant | $62.35 | $77.99 | 25.1% |
| Employer contributions | $29,014,709 | $31,097,640 | 7.2% |
Prior filing 20241011011801NAL0021120161001, received 2024-10-11; the plan years are contiguous.
Sponsor name as filed: ALLIANT ENERGY CORPORATE SERVICES, INC.; SEC registrant: ALLIANT ENERGY CORPORATE SERVICES INC (CIK 1081997, matched by EIN).