BNY Mellon's Own $568B 13F Is Only 1% of the $59.3T It Safeguards

Bank of New York Mellon Corp filed a Q4 2025 13F showing $567.68B in disclosed U.S. equity holdings across 33,186 positions. That is an enormous portfolio on its own. But it is still tiny relative to BNY Mellon's corporate scale: the bank said in its 2025 annual report that it finished the year with $59.3T in assets under custody and/or administration and $2.2T in assets under management. That distinction is the whole point of reading this filing correctly.

TL;DR

• BNY Mellon's Q4 2025 13F reported $567.68B and 33,186 positions with a 66.50 WhaleScore.
• The filing is not a read-through of the bank's $59.3T custody platform. The 13F is only about the securities BNY reports as an investment manager.
• Even versus BNY's own corporate asset-management base of $2.2T, the disclosed 13F book is only about 25.8% of that pool.
• The top holdings were familiar mega-cap leaders: NVDA, AAPL, MSFT, AMZN, and GOOGL.
• The most useful takeaway is interpretive, not sensational: BNY Mellon's 13F is a window into its reported investment-management exposures, not a balance-sheet proxy for the world's biggest custody bank.

Filing snapshot

Metric	Value	Why it matters
Filer	Bank of New York Mellon Corp	The legal 13F filer behind BNY's reported investment book.
Quarter	2025Q4	Report date: Dec. 31, 2025.
13F portfolio	$567.68B	The disclosed U.S. equity portfolio investors can inspect line by line.
Positions	33,186	One of the broadest filings in the database.
WhaleScore	66.50	Large and institutionally relevant, but not a concentrated hedge-fund-style book.
Corporate AUC/A	$59.3T	Client assets BNY safeguards or administers, not the same as its 13F portfolio.
Corporate AUM	$2.2T	Managed assets across investment and wealth management businesses.

Why the custody number and the 13F number are different

BNY Mellon is best understood first as market infrastructure. In its 2025 annual report and 10-K, the bank described itself as a global financial services platform with $59.3T in assets under custody and/or administration. Those assets belong to clients. They include the securities BNY safeguards, services, and administers for pension plans, asset managers, insurers, corporations, and wealth clients. None of that means all $59.3T should appear in one 13F.

The 13F instead covers only securities that BNY reports under institutional investment-manager rules. That means the disclosed $567.68B portfolio is better read as BNY's reportable investment-management footprint. It is the part of the franchise that actually shows up in this SEC form, not a shortcut to the full custody empire. If you want a mental model, compare this filing with how readers should interpret other platform-like managers such as Northern Trust, State Street, and Bank of America: these filings are often about managed exposures and model portfolios, not a single CIO making one concentrated macro bet.

Scale context: huge 13F, still only a slice of the platform

The simplest way to avoid a category mistake is to compare the three numbers side by side. BNY's $567.68B 13F portfolio equals only about 0.96% of the $59.3T it safeguards and about 25.8% of the $2.2T it manages. Put differently, the custody platform is about 104.5 times larger than the disclosed 13F book.

That is why headlines that blur custody assets and reported holdings can mislead retail investors. The $59.3T figure tells you BNY sits at the center of global capital markets. The $567.68B figure tells you what part of that world shows up in its own reportable investment portfolio. Both are important. They just answer different questions.

What did BNY Mellon own in Q4 2025?

At the top of the filing, BNY looked exactly like a giant institutional allocator would be expected to look in late 2025: dominant exposure to mega-cap U.S. technology and broad-market beta, not an idiosyncratic niche basket. The top five holdings were NVIDIA, Apple, Microsoft, Amazon, and Alphabet Class A. IVV at No. 9 is especially revealing because it signals that parts of the filing likely reflect benchmark-aware, model, or passively implemented exposure rather than pure bottom-up stock picking.

#	Ticker	Value	Weight	Read-through
1	NVDA	$29.45B	5.92%	The largest disclosed line item shows BNY's book still leaned into the AI-capex winner at year end.
2	AAPL	$26.61B	5.35%	Apple remained a core mega-cap exposure even in a diversified institutional filing.
3	MSFT	$26.33B	5.30%	Cloud and enterprise software stayed near the center of the portfolio.
4	AMZN	$15.80B	3.18%	Amazon kept consumer, cloud, and logistics exposure in the top tier.
5	GOOGL	$13.05B	2.63%	Alphabet Class A reinforced the filing's digital-ad and AI infrastructure bias.
6	AVGO	$10.38B	2.09%	Broadcom added more semiconductor and networking exposure.
7	META	$9.82B	1.98%	Meta kept platform advertising and AI monetization inside the top cluster.
8	GOOG	$9.24B	1.86%	Separate Alphabet share classes inflated the top-10 presence of one core theme.
9	IVV	$9.23B	1.86%	Broad-market ETF exposure hints at model portfolios, index sleeves, or implementation tools.
10	JPM	$7.55B	1.52%	JPMorgan rounded out the top 10 with large-cap financial exposure.

33,186 positions does not mean 33,186 high-conviction ideas

The position count is one of the most important clues in the filing. A 33,186-line-item portfolio is not the signature of a tight, concentrated stock picker. It is the signature of a platform. BNY's filing summary also reflects a combination-report structure with multiple included managers, which helps explain why the position count is so much larger than what many pure-play active managers report.

That breadth matters when you compare BNY with managers built on different business models. Geode Capital Management looks broad because it sits behind index implementation. Dimensional Fund Advisors looks broad because it expresses factor tilts across thousands of securities. BNY looks broad because a custody and asset-servicing franchise can aggregate many strategies, sleeves, and sub-advisers into one reportable picture.

Concentration is modest for a book this big

Even with massive mega-cap exposures, the filing is not dominated by a handful of names. The top three positions accounted for 14.51% of the portfolio. The top five reached 19.60%. The top 10 reached 27.74%, leaving 72.26% of the portfolio outside the top 10. That is exactly what investors should expect from a bank whose reportable investment book sits alongside enormous servicing, wealth, and investment-management operations.

In plain English: BNY's 13F is large enough to matter, diversified enough to avoid single-name dependency, and broad enough that the safest interpretation is structural rather than speculative. If you are looking for a simple stock-picking manifesto, this is the wrong filing. If you are looking for how a systemically important financial platform expresses market exposure, this filing is very useful.

What retail investors should take away

The right lesson is not that BNY secretly has a $59T stock portfolio. It is that institutional scale creates multiple layers of assets, and a 13F only captures one of them. For BNY, the disclosed portfolio tells you the firm maintained a broad, mega-cap-heavy, benchmark-aware equity footprint into year-end 2025. It does not tell you that client custody assets should be analyzed as if BNY directly owned them.

That makes BNY Mellon's Q4 filing more educational than dramatic. Investors who understand the distinction will read platform managers better across the board, whether they are studying State Street, Northern Trust, or Bank of America. The form is most powerful when you use it to identify what is actually reportable, not when you stretch it into a proxy for every asset a global bank touches.

FAQ

What was BNY Mellon's reported 13F portfolio in Q4 2025?

BNY Mellon reported $567.68B in Q4 2025 13F holdings across 33,186 positions.

Is BNY Mellon's 13F the same thing as its custody assets?

No. BNY said it had $59.3T in assets under custody and/or administration at year end 2025, but those are client assets the bank services. The 13F covers only the securities BNY reports as an investment manager.

What did BNY Mellon buy in Q4 2025?

The biggest disclosed positions were NVDA, AAPL, MSFT, AMZN, and GOOGL. The filing reads more like a broad institutional equity platform than a concentrated stock-picker's book.

Why does BNY Mellon have so many positions in its 13F?

Because the filing aggregates an enormous, multi-strategy investment-management footprint. A custody and asset-servicing institution can report far more line items than a single-manager hedge fund.

Why is IVV important in BNY Mellon's portfolio?

IVV in the top 10 suggests benchmark-aware implementation, model-portfolio exposure, or passive sleeves inside the broader filing. That is a clue the 13F is not just an active stock-picking roster.

Related reading on 13F Insight

• Northern Trust's $784.38B 13F is a custody-and-wealth-management map
• State Street's Q4 2025 13F and custodian scale
• Bank of America's Merrill-driven ETF and model-portfolio signals
• Geode's benchmark-heavy filing as an index-implementation case study
• DFA's broad but factor-driven version of scale