The Fee Mix Nobody ReadsNarrow moat

BlackRock (BLK) — moat facet

Read the two columns side by side and BlackRock is a different company from the one in the headlines: a tenth of the assets pay a quarter of the fees.

BlackRock publishes a table most people skip. It sets out, for each part of the book, the share of long-term assets it represents and the share of long-term base fees it produces. Read side by side, those two columns describe a completely different company from the one in the headlines.

Annualised base fees per dollar of AUM, Q2 2026 (basis points)Retail37.9bpInstitutional active17.5bpETFs16.6bpInstitutional index2.9bpBlackRock Form 10-Q, Q2 2026; quarterly fees x4 over June 2026 AUM
A retail dollar pays BlackRock about thirteen times what an institutional index dollar pays.

Institutional index is 29% of long-term assets and 6% of long-term base fees1. Retail is 10% of assets and 25% of fees2. Institutional active is 19% and 24%3. ETFs are 42% and 45%4. Alternatives are 3% of long-term assets and 17% of long-term base fees5. Fixed income, five times larger at 25% of assets, produces 22%6.

So nearly a third of the money BlackRock manages contributes almost nothing, and a tenth of it contributes a quarter. When a commentator says BlackRock manages $14 trillion, the figure is true and close to useless as a guide to what the company earns.

The reason the cheap assets are there at all is that they buy something. Scale in index management is what makes the ETF business's liquidity possible, gives BlackRock the trading footprint and securities-lending inventory it has, and puts the firm in front of every large institution on earth. A multi-billion-dollar institutional index mandate priced at a couple of basis points is not a bad piece of business; it is infrastructure, and BlackRock's own filing observes that flows in institutional index products generally have a small impact on revenues and earnings7.

The strategic consequence is that BlackRock's revenue growth depends far more on mix than on markets. A dollar moving from a two-basis-point mandate to a forty-basis-point private credit fund is invisible on the assets chart and transformative on the income statement. Almost everything management has done since 2023 — GIP, HPS, Preqin, the push into retail alternatives — is an attempt to move dollars in that direction.

The verdict is narrow rather than wide, for one reason. A favourable mix is a genuine advantage and it is not the same as a structural one. Much of BlackRock's has been purchased, at a cost visible in the equity base, and mix can move back as easily as it moved forward.

Moat trajectory: Widening

Private markets performance fees went from $308 million to $695 million in a year and alternatives are growing at 22% against 10% for the firm. The mix is moving the right way. It is moving because BlackRock bought the favourable end of it, which is why this is a purchased improvement rather than a structural one.

The number that tests this moat
Reported
Alternatives share of base fees
17% of fees, on 3% of assets

Fixed income is 25% of long-term assets and 22% of long-term base fees; equity is 61% and 50%. Alternatives is the only line that earns several times its weight, and a near-six-to-one ratio is the entire economic argument for the acquisitions, and the reason assets under management is a poor guide to what BlackRock earns.

Source: BlackRock Form 10-K, fiscal year 2025 ↗
Aspects of the moat
DIG DEEPER 01
Twenty-Nine Percent of the Money, Six Percent of the Fees
BlackRock's own filing concedes that flows in its largest asset category barely affect revenue — the cheap money is infrastructure, not business.
DIG DEEPER 02
Retail Is a Tenth of the Assets and a Quarter of the Fees
The great indexer's most profitable channel is actively managed mutual funds sold by people it does not employ.
DIG DEEPER 03
Alternatives: Three Percent That Pays Fifteen
A six-to-one ratio is the entire explanation for $30 billion of acquisitions.
DIG DEEPER 04
Performance Fees Show Up When Everything Else Is Quiet
The one revenue line not set by the fee rate, and it nearly tripled in two years on a business BlackRock did not previously own.
⚠ Threats to the moat
⚠ THREAT 01
Mix Can Shift Back
Every argument for BlackRock's fee mix assumes money keeps moving one way, and a drawdown moves it the other by itself.
⚠ THREAT 02
Buying the Mix Is Not the Same as Earning It
Equity rose 42% in two years, return on equity fell to 10.7%, and reported earnings per share went down on revenue up 19%.
References
  1. ReportedInstitutional index is 29% of long-term assets and 6% of long-term base fees
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — share of long-term AUM against share of long-term base fees and securities lending revenue: ETFs 42% of AUM and 45% of fees; institutional index $3.7 trillion, 29% of AUM and 6% of fees, with $119 billion of net outflows "driven primarily by a single client's partial redemptions"; institutional active 19% of AUM and 24% of fees; retail 10% of AUM and 25% of fees, of which active and index mutual funds are approximately $860 billion or 70% of retail long-term AUM and approximately 70% of retail long-term AUM is in active products; equity 61% of long-term AUM and 50% of long-term base fees. "Institutional non-ETF index assignments tend to be very large (multi-billion dollars) and typically reflect low fee rates. Net flows in institutional index products generally have a small impact on BlackRock's revenues and earnings." — FY2025 · publ. February 2026 · source ↗
  2. ReportedRetail is 10% of assets and 25% of fees
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — assets under management of $14.0 trillion at 31 December 2025 (long-term $12,960,786M plus cash management $1,080,732M); equity $7,793,875M, fixed income $3,272,021M, multi-asset $1,223,625M, alternatives $423,614M, digital assets $78,435M, currency and commodities $169,216M; five-year AUM CAGR 10%, alternatives 22%, multi-asset 13%, equity 12%, currency and commodities 17%, fixed income 4%; by style, active $3,432,743M, non-ETF index $4,060,333M, ETFs $5,467,710M; approximately 24,900 employees in more than 30 countries serving clients in over 100 — FY2025 · publ. February 2026 · source ↗
  3. ReportedInstitutional active is 19% and 24%
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — assets under management of $14.0 trillion at 31 December 2025 (long-term $12,960,786M plus cash management $1,080,732M); equity $7,793,875M, fixed income $3,272,021M, multi-asset $1,223,625M, alternatives $423,614M, digital assets $78,435M, currency and commodities $169,216M; five-year AUM CAGR 10%, alternatives 22%, multi-asset 13%, equity 12%, currency and commodities 17%, fixed income 4%; by style, active $3,432,743M, non-ETF index $4,060,333M, ETFs $5,467,710M; approximately 24,900 employees in more than 30 countries serving clients in over 100 — FY2025 · publ. February 2026 · source ↗
  4. ReportedETFs are 42% and 45%
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — assets under management of $14.0 trillion at 31 December 2025 (long-term $12,960,786M plus cash management $1,080,732M); equity $7,793,875M, fixed income $3,272,021M, multi-asset $1,223,625M, alternatives $423,614M, digital assets $78,435M, currency and commodities $169,216M; five-year AUM CAGR 10%, alternatives 22%, multi-asset 13%, equity 12%, currency and commodities 17%, fixed income 4%; by style, active $3,432,743M, non-ETF index $4,060,333M, ETFs $5,467,710M; approximately 24,900 employees in more than 30 countries serving clients in over 100 — FY2025 · publ. February 2026 · source ↗
  5. ReportedAlternatives are 3% of long-term assets and 17% of long-term base fees
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — assets under management of $14.0 trillion at 31 December 2025 (long-term $12,960,786M plus cash management $1,080,732M); equity $7,793,875M, fixed income $3,272,021M, multi-asset $1,223,625M, alternatives $423,614M, digital assets $78,435M, currency and commodities $169,216M; five-year AUM CAGR 10%, alternatives 22%, multi-asset 13%, equity 12%, currency and commodities 17%, fixed income 4%; by style, active $3,432,743M, non-ETF index $4,060,333M, ETFs $5,467,710M; approximately 24,900 employees in more than 30 countries serving clients in over 100 — FY2025 · publ. February 2026 · source ↗
  6. ReportedFixed income, five times larger at 25% of assets, produces 22%
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — assets under management of $14.0 trillion at 31 December 2025 (long-term $12,960,786M plus cash management $1,080,732M); equity $7,793,875M, fixed income $3,272,021M, multi-asset $1,223,625M, alternatives $423,614M, digital assets $78,435M, currency and commodities $169,216M; five-year AUM CAGR 10%, alternatives 22%, multi-asset 13%, equity 12%, currency and commodities 17%, fixed income 4%; by style, active $3,432,743M, non-ETF index $4,060,333M, ETFs $5,467,710M; approximately 24,900 employees in more than 30 countries serving clients in over 100 — FY2025 · publ. February 2026 · source ↗
  7. ReportedA multi-billion-dollar institutional index mandate priced at a couple of basis points is not a bad piece of business; it is infrastructure, and BlackRock's own filing observes that flows in institutional index products...
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — share of long-term AUM against share of long-term base fees and securities lending revenue: ETFs 42% of AUM and 45% of fees; institutional index $3.7 trillion, 29% of AUM and 6% of fees, with $119 billion of net outflows "driven primarily by a single client's partial redemptions"; institutional active 19% of AUM and 24% of fees; retail 10% of AUM and 25% of fees, of which active and index mutual funds are approximately $860 billion or 70% of retail long-term AUM and approximately 70% of retail long-term AUM is in active products; equity 61% of long-term AUM and 50% of long-term base fees. "Institutional non-ETF index assignments tend to be very large (multi-billion dollars) and typically reflect low fee rates. Net flows in institutional index products generally have a small impact on BlackRock's revenues and earnings." — FY2025 · publ. February 2026 · source ↗
Sources
Generated September 23, 2026