AllianceBernstein's $317B Q4 2025 Filing: 3,258 Positions and a Flat Quarter That Tells Its Own Story
AllianceBernstein held $317B across 3,258 positions in Q4 2025 — essentially unchanged from Q3. Nvidia, Microsoft, and Apple anchor the top, but the portfolio barely moved.
TL;DR
- AUM: $316.7B across 3,258 holdings (Q4 2025)
- Top holding: Nvidia (NVDA)
- #2: Microsoft (MSFT)
- #3: Apple (AAPL)
- AUM change: $317.6B (Q3) → $316.7B (Q4), −0.3% QoQ
- Holdings count: 3,264 (Q3) → 3,258 (Q4) — effectively flat
- Key feature: A $300B+ manager that barely changed between quarters
- Six-quarter AUM range: $276B to $318B — remarkably stable growth corridor
The Steady-State Portfolio
AllianceBernstein is one of the largest active managers in the world, and its Q4 2025 filing reveals something unusual: almost nothing changed. AUM went from $317.6B to $316.7B (−0.3%), holdings count shifted from 3,264 to 3,258, and the top positions remained the same mega-cap names.
For a fund that manages growth, value, fixed income, and multi-asset strategies, this stability is the story. It means AB's clients were neither fleeing nor flooding in, and the portfolio managers were not making dramatic repositioning moves.
The Mega-Cap Surface
Like most large diversified managers, AB's top 10 mirrors the S&P 500 weight table: Nvidia, Microsoft, Apple, Amazon, Alphabet, Broadcom, Meta, Eli Lilly, and others. No single position exceeds 5% — the mathematical reality of aggregating dozens of sub-strategies.
Six-Quarter Growth Corridor
AB's AUM trajectory tells a story of disciplined growth: $297.7B (Q3 24), $294.7B (Q4 24), $276.4B (Q1 25), $306.6B (Q2 25), $317.6B (Q3 25), $316.7B (Q4 25). The range of $276B to $318B is remarkably tight for a volatile equity market period.
What Analysts Might Misread
"AB is stagnating"
A flat quarter is not stagnation. AB grew 15% from Q1 to Q3 2025. The Q4 plateau likely reflects year-end rebalancing and a flattening equity market, not client attrition.
"The portfolio has no active bets"
The top-10 view hides the active component. AB runs concentrated equity strategies, value portfolios, and thematic plays within the 3,258 positions. The 13F aggregation smooths all of that into an index-like surface.
Frequently Asked Questions
What does AllianceBernstein invest in?
AB manages a diversified multi-strategy portfolio with 3,258 positions spanning growth, value, fixed income, and multi-asset strategies. The top holdings include Nvidia, Microsoft, Apple, and Amazon.
How large is AllianceBernstein's portfolio?
$316.7 billion in 13F-reportable assets as of Q4 2025.
Senior Market Analyst at 13F Insight. Covers institutional portfolio strategy, 13F filings, and smart money trends.
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