Ameriprise's $443B Q4 Filing Makes It the Fifth Mega-Filer to Build Netflix 900%+ in One Quarter — With the Lowest Top-5 Concentration We've Seen

Ameriprise Financial just became the fifth mega-filer we've identified that built Netflix shares by more than 700% in Q4 2025. At +943%, it's the largest percentage increase of the five. Combined, these five filers — representing $2.7 trillion in AUM — added over $12 billion in Netflix exposure in a single quarter.

But the Netflix build isn't the most distinctive feature of this $442.5 billion portfolio. That's the top-5 concentration of just 14.8% — the lowest of any mega-filer we've analyzed. Across 11,224 positions, no single stock exceeds 4% of the portfolio. This is what institutional diversification looks like at maximum scale.

TL;DR

• AUM: $442.5 billion across 11,224 positions (up from $435.4B in Q3)
• Top-5 concentration: 14.8% — lowest among mega-filers, reflecting extreme diversification
• Top holding: NVIDIA at $17.6B (4.0%) — even #1 is below 4%
• Netflix: Shares up 943% to $1.16B — fifth mega-filer to confirm this Q4 trade
• ServiceNow: Shares up 413% to $780M — matching the industry-wide enterprise software build
• Salesforce: Shares up 82% to $2.35B — aggressive CRM accumulation
• Tech sector ETF (XLK): Doubled (+101%) to $1.53B — adding passive tech exposure
• Visa in top 10: $4.8B (1.1%) — payments exposure unusual for top-10 placement
• 40 new positions, 40 exits — perfectly balanced turnover
• Whale Score: 67.75

The Netflix Trade Is Now an Industry Phenomenon

Five mega-filers. $2.7 trillion in combined AUM. All making the same trade at the same time:

Filer	AUM	NFLX Build	New Position
Capital International	$638B	+710%	$2.5B
Capital Research Global	$542B	+800%	$4.0B
Royal Bank of Canada	$615B	+893%	$2.1B
Legal & General	$451B	+916%	$2.5B
Ameriprise Financial	$443B	+943%	$1.2B

Total Netflix added across five filers: ~$12.3 billion in a single quarter.

At this scale, the Netflix build isn't a stock pick — it's an institutional consensus event. Five independent investment operations, each with their own research teams and processes, all reached the same conclusion about Netflix's advertising-tier revenue trajectory and subscriber momentum at the same time. For retail investors tracking consensus holdings, this is the clearest signal of the quarter.

ServiceNow follows the same pattern at Ameriprise: +413%, matching the 396-413% range seen at every other filer we've analyzed. The enterprise software thesis is equally unanimous.

14.8% Top-5 Concentration: Maximum Diversification

For context on how low 14.8% is:

Filer	Top-5 Concentration	Holdings
Capital Research Global	26.7%	434
Capital International	24.1%	454
Legal & General	24.7%	8,170
Royal Bank of Canada	15.6%	29,036
Ameriprise Financial	14.8%	11,224

Even NVIDIA at #1 is just 4.0% of the portfolio. Apple at #3 is 2.8%. This portfolio is so diversified that it's essentially a customized index — one built position by position rather than through ETF replication. Ameriprise manages money for approximately 2 million clients through its Columbia Threadneedle investment arm and financial advisor network. The extreme diversification reflects the aggregation of thousands of individual client portfolio models.

Visa in the Top 10

Visa at $4.8 billion (1.1%) makes Ameriprise's top 10 unusual. Most mega-filer top-10 lists are some permutation of the Magnificent Seven plus an ETF or two. Visa's presence signals that Ameriprise's client portfolios tilt toward quality dividend-growth names — the kind of stock a financial advisor puts in a retirement account alongside JPMorgan (also at #7 with $6.2B).

With IVV (iShares S&P 500 ETF) at #8 ($5.4B), the top 10 includes a mix of direct equity positions and passive index exposure — a textbook core-satellite construction common to wealth management platforms.

The Salesforce Build and Semiconductor Adds

Salesforce shares surged 82% to $2.35 billion. While the company's founder Marc Benioff has sold billions in stock over his career, institutional investors are clearly betting on Salesforce's AI-powered enterprise software evolution. At $2.35B, Salesforce is now a larger position than many of Ameriprise's top-10 names.

The semiconductor theme extends beyond NVIDIA:

• Texas Instruments — Up 68% to $1.04B. Analog chip maker benefiting from industrial and auto semiconductor demand.
• AMD — Up 65% to $760M. Ameriprise is adding NVIDIA's primary GPU competitor.
• XLK (Technology Sector ETF) — Doubled (+101%) to $1.53B. Broad tech sector exposure layered on top of individual picks.

The XLK doubling is notable because it shows Ameriprise adding both direct tech stocks and a tech sector ETF simultaneously. This suggests the tech sector build is a top-down model portfolio decision, not just bottom-up stock picking.

What Got Cut

Ameriprise's sell activity reveals a rotation away from industrials and select financials:

• Eaton Corp — Down 41% ($720M). Industrial power management.
• Northrop Grumman — Down 35% ($600M). Defense contractor trimmed while Capital Research Global holds RTX at $14B — differing views on defense within the same quarter.
• Uber — Down 27% ($810M). Trimming where Capital Research Global holds it in the top 10 — another divergence.
• CME Group — Down 23% ($1.01B). Financial exchange operator.
• Synopsys — Down 24% ($780M). Chip design software.

What Would You Ask About This Portfolio?

Is 14.8% top-5 concentration too low to generate alpha?

For an active stock picker, yes. But Ameriprise isn't trying to be a hedge fund. It's a wealth management platform aggregating thousands of client portfolios. The low concentration reflects responsible diversification across client accounts, not a lack of conviction. The Netflix and Salesforce builds show that within the diversified whole, individual model portfolios can express strong views.

Does the five-filer Netflix consensus mean it's too late to buy?

Not necessarily. Institutional consensus often precedes peak performance rather than marking the top. These filers built positions in Q4 2025 (October-December), and the 13F data is only visible now. The question is whether Netflix's advertising revenue and subscriber growth can sustain the valuation — and five independent research teams worth $2.7 trillion apparently think so.

Why double XLK while also adding individual tech stocks?

Different client segments get different exposure. Some advisory models use individual stocks (higher-net-worth accounts). Others use sector ETFs (simpler model portfolios). The simultaneous build reflects a firm-wide tech allocation increase being implemented through both channels.

How does Ameriprise compare to Charles Schwab?

Both are wealth management platforms, but Schwab serves approximately 35 million accounts while Ameriprise serves ~2 million. Schwab's portfolio is even more index-dominated, reflecting its discount brokerage heritage. Ameriprise's advisor-driven model allows for more active tilts (the 82% Salesforce build, for instance) within the diversified core.