Five Hundred Billion Dollars, in One YearNarrow moat

BlackRock (BLK) — moat facet

BlackRock did not grow in 2025 so much as reallocate: one part grew while two shrank, and the part that grew is the part that pays.

iShares took in $527 billion of net new money in 2025 — $289 billion into equity, $175 billion into fixed income, $35 billion into digital assets and $25 billion into commodities1.

2025 equity flows by channel ($bn)+$289bnETFs-$55bnNon-ETF index-$14bnActive equityNet equity inflow $220bn - one channel grew while two shrank, and it is the better-paid one
BlackRock did not grow in 2025 so much as reallocate. Bars show magnitude; two of the three are outflows.

The composition is more interesting than the total. Consider what was happening elsewhere in the same firm at the same time. Equity assets grew by $220 billion net, but that was $289 billion of ETF inflows offset by $55 billion out of non-ETF index mandates and $14 billion out of active equity2. Institutional index lost $119 billion overall3.

So BlackRock's growth in 2025 was not the company growing. It was one part of the company growing while two other parts shrank, and the part that grew is the part that is paid better. The mix shift was doing the work.

That is a good arrangement while it lasts, and it is the single most important thing to understand about BlackRock's revenue. Assets under management is the headline number and it obscures this entirely: a dollar leaving a two-basis-point institutional index mandate and arriving in an eighteen-basis-point ETF is a flat line on the AUM chart and a large positive on the revenue statement.

It also means the flow number to watch is not net flows. It is net flows by category, and specifically whether the expensive categories keep growing when the cheap ones stop shrinking.

Moat trajectory: Widening

The flow is not just large, it is arriving in the better-paid end of the book while the cheap end shrinks. In the second quarter of 2026, $178 billion of $199 billion of long-term net inflows came through ETFs.

The number that tests this moat
Reported
ETF share of long-term net inflows
$178B of $199B in Q2 2026

Long-term net inflows of $199 billion in the quarter, of which ETFs supplied $178 billion, retail $19 billion and institutional clients $2 billion. Growth this concentrated in one channel is the mix shift working and the breadth narrowing at the same time.

Source: BlackRock Form 10-Q, quarter ended June 30, 2026 ↗
⚠ Threats to the moat
⚠ THREAT 01
Flows Follow Markets
Two-thirds of the growth in the flagship business was prices rather than persuasion, and the next drawdown is the only honest test of which.
References
  1. ReportediShares took in $527 billion of net new money in 2025 — $289 billion into equity, $175 billion into fixed income, $35 billion into digital assets and $25 billion into commodities
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — iShares ETF AUM $5.5 trillion with $527 billion of 2025 net inflows: equity $289,263M, fixed income $175,328M, digital assets $34,763M, commodities $25 billion, multi-asset $1,978M; US-listed ETF AUM $3.9 trillion with $367 billion of inflows and international listings $1.6 trillion with $160 billion; equity ETF AUM rose from $3,106,398M to $4,006,014M on $580,684M of market change and $29,669M of FX, fixed income from $985,652M to $1,205,953M, digital assets from $55,306M with a negative market change; 2025 equity net inflows $220 billion overall, being $289 billion into ETFs against $55 billion and $14 billion of outflows from non-ETF index and active; fixed income net inflows $164 billion, $175 billion into ETFs and $29 billion into active; "approximately half of BlackRock's equity AUM is tied to international market strategies, including emerging markets, which tend to have higher fee rates than US equity strategies" — FY2025 · publ. February 2026 · source ↗
  2. ReportedEquity assets grew by $220 billion net, but that was $289 billion of ETF inflows offset by $55 billion out of non-ETF index mandates and $14 billion out of active equity
    BlackRock, Inc. Form 10-K, FY2025, Item 1 Business — iShares ETF AUM $5.5 trillion with $527 billion of 2025 net inflows: equity $289,263M, fixed income $175,328M, digital assets $34,763M, commodities $25 billion, multi-asset $1,978M; US-listed ETF AUM $3.9 trillion with $367 billion of inflows and international listings $1.6 trillion with $160 billion; equity ETF AUM rose from $3,106,398M to $4,006,014M on $580,684M of market change and $29,669M of FX, fixed income from $985,652M to $1,205,953M, digital assets from $55,306M with a negative market change; 2025 equity net inflows $220 billion overall, being $289 billion into ETFs against $55 billion and $14 billion of outflows from non-ETF index and active; fixed income net inflows $164 billion, $175 billion into ETFs and $29 billion into active; "approximately half of BlackRock's equity AUM is tied to international market strategies, including emerging markets, which tend to have higher fee rates than US equity strategies" — FY2025 · publ. February 2026 · source ↗
  3. ReportedInstitutional index lost $119 billion overall
    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