---
title: "AllianceBernstein's $317B Q4 2025 Filing: 3,258 Positions and a Flat Quarter That Tells Its Own Story"
type: research
slug: alliancebernstein-q4-2025-317b-diversified-portfolio-steady-state
canonical_url: https://13finsight.com/research/alliancebernstein-q4-2025-317b-diversified-portfolio-steady-state
published_at: 2026-03-09T18:21:45.181Z
updated_at: 2026-03-23T07:03:54.816Z
author: Marcus Chen
author_title: Senior Market Analyst
author_url: https://13finsight.com/authors/marcus-chen
word_count: 327
locale: en
source: 13F Insight
---

# 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;DRAUM: $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% QoQHoldings count: 3,264 (Q3) → 3,258 (Q4) — effectively flatKey feature: A $300B+ manager that barely changed between quartersSix-quarter AUM range: $276B to $318B — remarkably stable growth corridorThe Steady-State PortfolioAllianceBernstein 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 SurfaceLike 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 CorridorAB'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 QuestionsWhat 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.

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Source: 13F Insight — https://13finsight.com/research/alliancebernstein-q4-2025-317b-diversified-portfolio-steady-state
Author: Marcus Chen — https://13finsight.com/authors/marcus-chen
Last updated: 2026-03-23T07:03:54.816Z