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Original filing (PDF)20251015124522NAL0004576033001
ALLIANT ENERGY CORPORATE SERVICES, INC.
Form 5500
FILING_RECEIVED
ALLIANT ENERGY CORPORATION MASTER RETIREMENT TRUST
Pooled investment trust — a fund that other plans invest in — not a participant plan
Active participants
—
Accounts w/ balance
—
Plan assets (EOY)
$715.8M
Net assets (EOY)
$715.2M
How this plan invests
3 plans
invest in this fund
This trust
pooled vehicle
46 securities
Schedule of Assets
This is a pooled fund: many plans invest in it, and it holds the underlying securities.
Master trust / DFE filing
Pooled investment vehicle
This filing is a Direct Filing Entity (DFE) — a master trust or collective investment trust that pools assets from multiple participating plans. It does not have plan participants of its own, and the Plan Health Score formula doesn’t apply. Individual participant-facing plans that invest in this trust are the appropriate target for fiduciary analysis.
Pooled assets (EOY)
$715.8M
Net assets (EOY)
$715.2M
Participating plans
3
latest filings citing this trust
Cited interest
$715.6M
across citing plans' latest filings
Cited interest vs pooled assets: cited interest sums what each participating plan reported holding in this trust, measured at that plan’s own year-end — and those filings span different years. Pooled assets is this single filing’s balance at one date. They’re independent measurements, so cited interest can land slightly above or below the pooled balance and won’t reconcile exactly.
Why no Schedule of Assets here? DFE holdings often live on the master trust’s own audited statement, not as a 4i schedule on the participating plans’ filings. We’re extending the parsing pipeline to cover DFE filings — see Methodology.
Decision-maker contacts
CFO / Head of HR / Benefits Manager — verified email + LinkedIn for ALLIANT ENERGY CORPORATE SERVICES, INC..
Plan sponsor
Name
ALLIANT ENERGY CORPORATE SERVICES, INC.
EIN
39-1914946
Address
4902 NORTH BILTMORE LANE · MADISON, WI · 537182148
Phone
(608) 458-3311
Plan administrator
Same as plan sponsor.
Plan characteristics
Plan number
100
Plan year
2024
Plan year begin
2024-01-01
Tax period
2024-12-31
Filed
2025-10-15
Audit & trust (Schedule H)
Auditor
—
Trustee / custodian
—
Trustee phone
—
Service providers (Schedule C)
No Schedule C providers reportedInvestments
45 direct securities · 16 pooled funds· $1.5B(100% of reported assets)
Rows tagged as a trust or pooled fund hold many underlying securities. Click one to drill into its own Schedule of Assets — where the individual funds, shares, and CUSIPs live.
Uncategorized
$823.4M
45 holdings
Common Collective Trust
$625.2M
14 holdings
103-12 Investment Entity
$41.4M
2 holdings
| PI | Investment | Type | Shares / units | Cost | Current value | % of plan |
|---|---|---|---|---|---|---|
| LONG CREDIT BOND FUND AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 040 | Common Collective Trust | — | — | $217.3M | 30.4% | |
| 996990172 ALLIANT ENERGY CASH BALANCE MASTER TRUST UNITIZED | — | — | $201.9M | $209.3M | 29.2% | |
| 00187K530 AON COLLECTIVE INVT TR LONG CR BD | — | — | $164.2M | $166.1M | 23.2% | |
| AON LARGE CAP EQUITY CL I AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 002 | Common Collective Trust | — | — | $80.9M | 11.3% | |
| AON HEWITT GLOBAL EQUITY CLASS I AON HEWITT COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 004 | Common Collective Trust | — | — | $79.1M | 11.1% | |
| 00185C555 AON COLLECTIVE INVT TR LARGE CAP EQUITY CL I | — | — | $50.2M | $56.5M | 7.9% | |
| AON LARGE CAP EQUITY INDEX FUND AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 046 | Common Collective Trust | — | $53.0M | $55.4M | 7.7% | |
| 00187K530 AON COLLECTIVE INVT TR LONG CR BD | — | — | $50.3M | $51.2M | 7.1% | |
| NON US EQUITY CL I AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 005 | Common Collective Trust | — | — | $45.7M | 6.4% | |
| AON RETURN ENHANCING ALTN PORT SP AON INVESTMENTS USA, INC · EIN 98-1419542 / PN 001 | 103-12 Investment Entity | — | — | $41.4M | 5.8% | |
| SHARES / PAR 00187K498 AON COLLECTIVE INVT TR LARGE CAP EQUITY INDEX FD | — | — | $33.9M | $38.8M | 5.4% | |
| AON MULTI ASSET CREDIT FUND AON TRUST COMPANY · EIN 37-6543784 / PN 041 | Common Collective Trust | — | — | $34.2M | 4.8% | |
| 00185C480 AON COLLECTIVE INVT TR NON-US EQUITY CL I | — | — | $32.9M | $31.7M | 4.4% | |
| AON NON-U.S. EQUITY INDEX FUND AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 044 | Common Collective Trust | — | — | $31.1M | 4.3% | |
| 00185C555 AON COLLECTIVE INVT TR LARGE CAP EQUITY CL I | — | — | $21.7M | $24.4M | 3.4% | |
| 00185C456 AON HEWITT COLLECTIVE INVT TR GLOBAL EQUITY CL I | — | — | $23.0M | $24.0M | 3.3% | |
| AON SM & MID CAP EQUITY CL I AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 003 | Common Collective Trust | — | — | $23.6M | 3.3% | |
| AON HIGH YIELD PLU CL I AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 007 | Common Collective Trust | — | — | $23.3M | 3.3% | |
| 00187K480 AON COLLECTIVE INVT TR NON-US EQUITY INDEX FD | — | — | $21.9M | $21.6M | 3.0% | |
| 00185C381 AON COLLECTIVE INVT TR HIGH YIELD PLUS CL I | — | — | $16.2M | $17.2M | 2.4% | |
| 00187K498 AON COLLECTIVE INVT TR LARGE CAP EQUITY INDEX FD | — | — | $14.6M | $16.6M | 2.3% | |
| 00185C522 AON COLLECTIVE INVT TR SM & MID CAP EQUITY CL I | — | — | $15.2M | $16.6M | 2.3% | |
| 729999284 AON RETURN ENHANCING ALTERNATIVES PORTFOLIO SP | — | — | $15.1M | $15.4M | 2.2% | |
| US LONG GOVT BOND INDEX FUND AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 042 | Common Collective Trust | — | — | $15.4M | 2.1% | |
| 00185C480 AON COLLECTIVE INVT TR NON-US EQUITY CL I | — | — | $14.5M | $13.9M | 1.9% | |
| 729999292 AON RETURN ENHANCING ALTERNATIVES PORTFOLIO SP | — | — | $13.4M | $13.7M | 1.9% | |
| U.S. INTERMEDIATE GOVT BOND INDEX F AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 043 | Common Collective Trust | — | — | $12.5M | 1.7% | |
| 729999367 AON RETURN ENHANCING ALTERNATIVES PORTFOLIO SP | — | — | $12.1M | $12.3M | 1.7% | |
| 741999056 AON MULTI ASSET CREDIT FUND | — | — | $11.1M | $11.5M | 1.6% | |
| 740993100 AON MULTI ASSET CREDIT FUND | — | — | $10.7M | $11.1M | 1.5% | |
| 00187K456 AON COLLECTIVE INVT TR US LONG GOVT BD INDEX FD | — | — | $11.2M | $10.8M | 1.5% | |
| 00187K480 AON COLLECTIVE INVT TR NON-US EQUITY INDEX FD | — | — | $9.6M | $9.5M | 1.3% | |
| 00185C522 AON COLLECTIVE INVT TR SM & MID CAP EQUITY CL I | — | — | $6.5M | $7.1M | 1.0% | |
| 00187K464 AON COLLECTIVE INVT TR US INTERMEDIATE GOVT BD INDEX FD | — | — | $6.8M | $7.0M | 1.0% | |
| INTERMEDIATE CREDIT BOND FUND AON COLLECTIVE INVESTMENT TRUST · EIN 37-6543784 / PN 038 | Common Collective Trust | — | — | $6.7M | 0.9% | |
| SHARES / PAR GENERAL INVESTMENTS - OTHER =========================== OTHER SECURITIES ---------------- MS6109016 CASH COLLATERAL NOT ADMINISTERED BY BANK, | — | — | $6.1M | $6.1M | 0.9% | |
| 00185C381 AON COLLECTIVE INVT TR HIGH YIELD PLUS CL I | — | — | $5.7M | $6.0M | 0.8% | |
| 00187K464 AON COLLECTIVE INVT TR US INTERMEDIATE GOVT BD INDEX FD | — | — | $5.4M | $5.5M | 0.8% | |
| 00187K456 AON COLLECTIVE INVT TR US LONG GOVT BD INDEX FD | — | — | $4.6M | $4.5M | 0.6% | |
| 00187K548 AON COLLECTIVE INVT TR INTERMEDIATE CR BD | — | — | $3.8M | $4.0M | 0.6% | |
| 00187K548 AON COLLECTIVE INVT TR INTERMEDIATE CR BD | — | — | $2.7M | $2.8M | 0.4% | |
| 922031778 VANGUARD LONG TERM INVESTMENT GRADE FUND ADMIRAL CLASS #568 | — | — | $2.9M | $2.6M | 0.4% | |
| GENERAL INVESTMENTS - OTHER =========================== OTHER SECURITIES ---------------- MS6109016 CASH COLLATERAL NOT ADMINISTERED BY BANK, | — | — | $1.9M | $1.9M | 0.3% | |
| 922908801 VANGUARD TOTAL STOCK MARKET INDEX FUND INSTITUTIONAL SHARES | — | — | $826K | $1.2M | 0.2% | |
| 92206C862 VANGUARD INTERMEDIATE-TERM CORPORATE BOND INDEX FUND CLASS INS #1646 | — | — | $582K | $529K | <0.1% | |
| 954175M10 LG CAP S&P 500 IDX SEP ACCT - PRINCIPAL GLOBAL INVESTORS | — | — | $524K | $524K | <0.1% | |
| 921937876 VANGUARD LONG TERM BOND INDEX FUND INSTITUTIONAL CLASS #0545 | — | — | $720K | $517K | <0.1% | |
| 921909784 VANGUARD TOTAL INTERNATIONAL STOCK INDEX FUND INSTITUTIONAL CLASS #1869 | — | — | $526K | $515K | <0.1% | |
| 954177M16 SMALL CAP BLEND SEP ACCT PRINCIPAL GLOBAL INVESTORS | — | — | $126K | $126K | <0.1% | |
| 954172M17 GUARANTEED INTEREST ACCOUNTS - PRINCIPAL GLOBAL INVESTORS | — | — | $75K | $75K | <0.1% | |
| INVESTMENT PURPOSES AT END OF YEAR BASE CURRENCY: USD | — | — | — | $31K | <0.1% | |
| SHARES / PAR 954173M15 LIQUID ASSETS SEPARATE ACCOUNT PRINCIPAL GLOBAL INVESTORS | — | — | $18K | $18K | <0.1% | |
| 74251A967 MIDCAP BLEND SEP ACCT PRINCIPAL GLOBAL INVESTORS | — | — | $15K | $15K | <0.1% | |
| 954178M14 DIVERSIFIED INTL SEPT ACCT - PRINCIPAL GLOBAL INVESTORS | — | — | $14K | $14K | <0.1% | |
| 954174M13 CORE PLUS BOND SEPARATE ACCOUNT PRINCIPAL GLOBAL INVESTORS | — | — | $10K | $10K | <0.1% | |
| 74251A900 GOVERNMENT & HQ BOND SEPT ACCT - PRINCIPAL GLOBAL INVESTORS | — | — | $5K | $5K | <0.1% | |
| 925473M15 EQUITABLE LIFE ASSURANCE GROUP GAC | — | — | $2K | $2K | <0.1% | |
| CORPORATE DEBT INSTRUMENTS: ALL OTHER ------------------------------------- 023138AA8 AMBAC ASSURANCE CORP 144A PRIV PLCMT 5.100 06/07/2020 0 | — | — | — | $1K | <0.1% | |
| BLACKROCK MSCI USA MIN VOLATILITY BLACKROCK INSTITUTIONAL TRUST CO · EIN 46-1026632 / PN 001 | Common Collective Trust | — | — | $0 | <0.1% | |
| SHORT DURATION CR TR IRT MIRRORED LORD ABBETT · EIN 82-1116174 / PN 322 | Common Collective Trust | — | — | $0 | <0.1% | |
| INTERNATIONAL EQUITY TRUST MORGAN STANLEY INV MGT · EIN 04-3222247 / PN 001 | 103-12 Investment Entity | — | — | $0 | <0.1% |