AUM, Fee-Paying AUM and Perpetual Capital

Total AUM Overstates What Pays Fees Today

Alternative managers headline total assets under management (AUM), but equity research builds FRE forecasts from the fee-paying subset: fee-paying AUM (FPAUM), fee-earning AUM, fee-generating AUM, or fee-bearing capital (FBC). The rule is simple: AUM ≥ FPAUM. Committed capital waiting to be deployed counts in AUM but may not yet earn management fees.

Perpetual capital, a further slice of AUM or FPAUM, sits in indefinite-term vehicles. Duration of fees and fundraising risk drive valuation premiums on perpetual-heavy platforms. See our alternative manager valuation guide for how the market prices that mix.

Four Labels, One Concept

Issuers use different names for the fee-paying base. When cross-comping, normalise the label before comparing dollars.

Each is the subset currently paying management fees. Total AUM is always at least as large.

End-FY2025: AUM vs Fee-Paying Base

Brookfield is the outlier on presentation: the over $1 trillion platform AUM it headlines spans the broader Brookfield ecosystem, while $603B fee-bearing capital is what BAM actually charges fees on. Do not compare BAM platform AUM to Blackstone total AUM without footnoting the fee-base difference.

Why AUM Exceeds FPAUM: Undeployed Commitments

KKR’s Q4 2024 earnings release noted $57B of committed capital not yet paying fees at 31 Dec 2024. Capital committed to drawdown funds sits in total AUM from the commitment date, but FPAUM typically rises only when capital is invested and begins paying management fees.

That gap matters for forward FRE modelling: fundraising momentum (FY2025 BX inflows $239.4B, KKR new capital raised $129.4B, APO inflows $228B) feeds future FPAUM, but the conversion lag means AUM growth can outpace near-term FRE growth.

Perpetual Capital: Definition and Peer Shares

Perpetual capital has no predetermined return-of-capital date. KKR’s definition includes registered funds, unregistered permanent vehicles, listed companies, and insurance companies (Global Atlantic). Insurance balance sheets are indefinite-duration capital; KKR’s Feb 2025 investor presentation embeds Global Atlantic inside the perpetual bucket.

End-FY2025 perpetual shares:

Apollo is the case where the two columns diverge most: 57% of its assets are perpetual, but more than 70% of the assets actually paying fees are. The perpetual vehicles are disproportionately fee-paying, which is the version that matters for the fee stream.

Ares needs a warning label. It reports a 32% perpetual-capital share of AUM and, separately, an 85% figure for funds that are perpetual or long-dated, the broader one sweeping in closed-end credit vehicles with long but finite lives. Both are filed and both are true; they describe different things. Line the 85% up against the strict shares above it and the least perpetual manager in the set reads as the most.

Worked Example: Blackstone’s AUM-to-FPAUM Gap

Blackstone end-FY2025:

1. Total AUM: $1,274.9B
2. Fee-earning AUM: $921.7B
3. Non-fee-earning AUM: $1,274.9B − $921.7B = $353.2B (28% of total)
4. Perpetual AUM: $523.6B, or 41% of total; the fee-earning slice of that is $445.8B, which is 48% of the fee-earning base

The $353.2B gap is capital Blackstone manages or advises that is not currently on the fee-earning base: undeployed commitments, co-investment capital, and other non-fee-earning sleeves. FRE of $5.7B in FY2025 ran on the $921.7B fee-earning base, not the full $1.27T headline.

Perpetual Premium and Valuation

Platforms with >50% of fee-paying AUM in perpetual vehicles typically warrant +3–8 P/FRE turns versus drawdown-heavy peers, holding growth and FRE margin constant. Check the base before applying it: at end-FY2025 KKR filed 51% of FPAUM as perpetual, Apollo more than 70% of fee-generating AUM, and Brookfield 87% of fee-bearing capital.

Do not read the whole of an insurance-augmented manager’s multiple as a perpetual premium, though. Where the market cap also capitalises insurance spread earnings, as Apollo’s does with Athene, those earnings are not in the FRE it is being divided by.

Fundraising Momentum: Not Summable Across Peers

FY2025 capital-raising disclosures differ by issuer definition:

Do not sum these into a “sector total.” Inflows, new capital raised, and gross commitments measure different things. Use each issuer’s metric for that company’s forward FPAUM build only.

For issuer-level detail, see our Brookfield Asset Management, Apollo Global Management, and Ares Management profiles. The FRE vs DE guide covers how recurring earnings flow from the fee-paying base.

What Matters Most

Headline AUM measures scale. FPAUM is what pays fees today, and perpetual share tells you how much of that fee base resets on a drawdown calendar. Brookfield’s trillion-dollar-plus platform versus $603B fee-bearing capital is the starkest reminder that the biggest number in the press release is not always the fee base.