Northern Trust’s $784B Custody Book Accumulated Netflix (+883%) and ServiceNow (+400%) in Q4 2025

Northern Trust Corp closed Q4 2025 with $784 billion in 13F assets — barely changed from $782B in Q3 — but the stability at the surface masked two blockbuster moves underneath. The custody bank increased its Netflix (NFLX) share count by 883% (from 4.4M to 43.4M shares) and ramped ServiceNow (NOW) by 400% (from 2.2M to 11.0M shares). At a firm where the top-5 holdings move by basis points quarter to quarter, those are seismic reallocations.

TL;DR — Key Takeaways

• AUM: $784B (from $782B in Q3 2025), 20,753 holdings
• Top position: NVDA at $47.3B (6.0%) — overtook AAPL for the #1 spot
• NFLX accumulation: Shares jumped from 4.4M to 43.4M (+883%), value from $5.3B to $4.1B
• NOW accumulation: Shares jumped from 2.2M to 11.0M (+400%), value from $2.0B to $1.7B
• Core stability: NVDA, AAPL, MSFT held the top-3 with minimal weight changes
• Concentration: Top-5 at 24.7%, top-10 at 33.7% — typical custody bank diversification
• Turnover: 24 new positions, 24 exits — extremely low churn
• YoY growth: +11% from $706B in Q4 2024, steady institutional capital accretion

Filing Snapshot

Metric	Q4 2025	Q3 2025	Change
Total AUM	$784.4B	$781.7B	+0.3%
Holdings count	20,753	20,749	+4
Report date	Dec 31, 2025	Sep 30, 2025	—
Filing date	Feb 17, 2026	—	—
New positions	24	—	—
Exited positions	24	—	—
Whale Score	70.5	—	—

NVDA Takes the Crown from Apple

Nvidia now sits at the top of Northern Trust’s book at $47.3B (6.0%), edging out Apple (AAPL) at $43.7B (5.6%). This wasn’t a dramatic trade — NVDA’s Q3 value was $48.4B, so the holding actually shrank slightly. Apple also dipped from $41.9B. The reordering reflects relative price performance more than active allocation decisions.

Microsoft (MSFT) remains the #3 position at $38.6B (4.9%), down from $42.0B in Q3. The top-3 collectively lost about $4B in value, almost entirely from market-price movement on slightly reduced share counts. Northern Trust trimmed NVDA from 259M to 254M shares and MSFT from 81M to 80M shares — routine rebalancing at custody scale.

Netflix: 883% Share Surge

The headline move: Netflix shares jumped from 4.4 million to 43.4 million — an 883% increase. Yet the reported value actually dropped from $5.3B to $4.1B. This is unusual for a custody bank, which typically reports pure long positions rather than options-hedged structures.

Two possible explanations: (1) Northern Trust consolidated client accounts that previously held NFLX outside the 13F reporting entity, or (2) the bank significantly ramped client allocations to Netflix across managed accounts. Given that the portfolio weight only moved from 0.68% to 0.52%, the share-count jump likely reflects restructuring rather than a massive new bet.

Either way, 43.4 million NFLX shares makes Northern Trust a top-20 institutional holder of the stock. That’s meaningful positioning for a custody bank that typically mirrors broad market weights.

ServiceNow: 400% Share Ramp

ServiceNow showed a similar pattern: shares increased from 2.2M to 11.0M (+400%), while value dropped from $2.0B to $1.7B. The weight moved from 0.26% to 0.21%. Like NFLX, the share-count explosion paired with declining value suggests this is a structural change in how the position is reported rather than a massive directional trade.

ServiceNow’s enterprise workflow automation platform has become a core holding for institutional managers. At $1.7B, it remains a mid-tier position for Northern Trust, but the expanded share count signals growing client demand for exposure to enterprise AI infrastructure.

The Custody Bank Model: Why This Book Looks Like It Does

Northern Trust is one of the largest custody banks in the world, managing assets on behalf of institutional clients, pension funds, and endowments. Its 13F reflects aggregated client holdings, not proprietary trading decisions. This is why:

• The top holdings mirror the S&P 500’s largest weights (NVDA, AAPL, MSFT, AMZN, GOOGL)
• Concentration is moderate (top-5 at 24.7%) — no outsized conviction bets
• Turnover is minimal (24 in, 24 out) — the book evolves with market cap, not trading theses
• Holdings count at 20,753 is massive, covering nearly every investable US equity

Reading Northern Trust’s 13F as “what Northern Trust thinks about stocks” misses the point. It’s a census of what America’s institutional capital owns, weighted by the clients Northern Trust serves.

Beyond Megacaps: The Mid-Tier Movers

Beyond the NFLX and NOW headlines, the rest of the portfolio was remarkably stable:

• Amazon (AMZN): $21.9B (2.8%) — steady at the #4 position
• Alphabet (GOOGL): $20.4B (2.6%) — unchanged core allocation
• Broadcom (AVGO): $16.5B (2.1%) — semiconductor exposure continues to grow
• Meta (META): $14.6B (1.9%) — stable social media weight
• JPMorgan (JPM): $10.2B (1.3%) — financials representation
• Eli Lilly (LLY): $9.5B (1.2%) — healthcare anchor

The breadth here is typical Northern Trust. No position dominates, no sector is wildly overweight, and the changes are measured in basis points. This is what $784B of diversified institutional capital looks like.

Year-Over-Year Trajectory

Northern Trust’s AUM has grown 11% from $706B in Q4 2024 to $784B in Q4 2025. The growth curve has been remarkably smooth — no quarter in 2025 saw more than a 5% swing. This steadiness reflects the custody business model: client assets grow with market appreciation, and net flows tend to be incremental rather than episodic.

The holdings count expanded from 19,353 to 20,753 over the same period, suggesting Northern Trust added coverage of smaller-cap names as client mandates broadened. This is consistent with the industry trend of custody banks offering more granular passive and systematic strategies.

Q&A: Common Questions

Why did Northern Trust’s Netflix shares increase 883% but value dropped?

The share count and value moving in opposite directions typically indicates a structural change in how the position is consolidated across client accounts, or a shift in the reporting entity’s composition. The underlying client exposure to NFLX likely changed less dramatically than the raw 883% figure suggests.

Is Northern Trust’s portfolio its own investment view?

No. Northern Trust is a custody bank — the 13F represents aggregated client holdings. The portfolio mirrors broad market weights because it reflects thousands of institutional clients’ collective allocations, not proprietary investment decisions.

How does Northern Trust compare to other custody banks?

Northern Trust’s $784B book sits below State Street and BNY Mellon in custody AUM, but its 13F concentration profile is similar. All three run diversified, megacap-heavy books with 20,000+ holdings and minimal quarter-to-quarter turnover.

What does the 70.5 Whale Score mean?

Northern Trust’s Whale Score of 70.5 reflects high institutional relevance — the firm manages significant assets with broad market coverage. The score is driven by AUM scale and holdings breadth, not by concentrated conviction bets.

Should retail investors follow Northern Trust’s moves?

Following custody bank 13F changes is generally less actionable than following concentrated hedge funds. Northern Trust’s moves reflect aggregate client demand, not stock-picking conviction. The NFLX and NOW changes are notable for scale, but their signal value for directional trading is limited.