What both funds hold

The heaviest companies both funds hold. The shared figure is the smaller of the two weights, which is the part of each dollar that lands in the same place either way.

#	Company	SPY	SPYM
1	NVIDIA Corp	7.52%	7.51%
2	Apple Inc	6.59%	6.59%
3	Microsoft Corp	4.30%	4.29%
4	Amazon.com Inc	3.62%	3.62%
5	Alphabet IncUS02079K3059	3.25%	3.25%
6	Broadcom Inc	2.77%	2.77%
7	Alphabet IncUS02079K1079	2.59%	2.59%
8	Micron Technology Inc	2.02%	2.02%
9	Meta Platforms Inc	1.92%	1.92%
10	Tesla Inc	1.84%	1.83%
11	Eli Lilly & Co	1.47%	1.47%
12	Advanced Micro Devices Inc	1.47%	1.47%
13	Berkshire Hathaway Inc	1.42%	1.42%
14	JPMorgan Chase & Co	1.36%	1.36%
15	Intel Corp	1.02%	1.02%
16	Johnson & Johnson	0.95%	0.95%
17	Applied Materials Inc	0.89%	0.89%
18	Visa Inc	0.88%	0.88%
19	Exxon Mobil Corp	0.88%	0.88%
20	Lam Research Corp	0.84%	0.84%
21	Walmart Inc	0.77%	0.77%
22	Caterpillar Inc	0.76%	0.76%
23	Cisco Systems Inc	0.72%	0.72%
24	AbbVie Inc	0.69%	0.69%
25	Costco Wholesale Corp	0.64%	0.64%

Where they differ

SPY reports 504 holdings and SPYM reports 507. 504 of them appear in both, which leaves 0 only in SPY and 3 only in SPYM.

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Each fund on its own

Fund	Holdings	Cost a year	Yield	Filing covers
SPYState Street® SPDR® S&P 500® ETF Trust	504	0.095%	1.00%	99.98%30 June 2026
SPYMState Street® SPDR® Portfolio S&P 500® ETF	507	0.02%	1.28%	100.08%30 June 2026

Both sets of holdings come from the funds' own Form N-PORT filings with the SEC, covering 99.98% of SPY and 100.08% of SPYM. Overlap is the sum of the smaller weight over every company both funds hold. Costs and yields come from our market data provider.

SPY vs SPYM

What both funds hold

Where they differ

Each fund on its own

Now see it across a whole portfolio