SPMD vs VXF overlap - what they share and where they differ
SPMD and VXF share 42.3% of their weight across 398 common positions, read from what each fund reported to the SEC.
Each week Ploutos reads the reported positions of the largest US equity ETFs and measures, pair by pair, the weight they share: for every stock both funds hold, the smaller of the two weights counts. Two funds tracking the same index land near 100%. A sector fund inside a broad index fund lands at roughly that sector's weight.
SPMD and VXF
42.3%
398 shared positions
SPMD
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Reported positions cover 100% of the fund, 400 positions · Jun 30, 2026
Top 10: 7.7%·Holdings of SPMD
VXF
VANGUARD EXTENDED MARKET INDEX FUND
Reported positions cover 99% of the fund, 1,792 positions · Jun 30, 2026
Top 10: 7.6%·Holdings of VXF
Reported positions cover SPMD 100%, VXF 99% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VXF vs SPMD side by side
SPMDState Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
400
stock positions reported to the SEC
0.9% of its weight is in 2 names VXF does not hold
VXFVANGUARD EXTENDED MARKET INDEX FUND
1,792
stock positions reported to the SEC
56.3% of its weight is in 1,394 names SPMD does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: VXF has 3.5 points more of it.
The figures side by side
| SPMD | VXF | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 400 | 1,792 |
| Weight of the ten largest | 7.7% | 7.6% |
| Largest position | TWLO 0.9% | SPCX 1.2% |
| Held alone | 2 positions, 0.9% | 1,394 positions, 56.3% |
| Covered by stock positions | 100% | 99% |
Holdings they share
| Stock | In SPMD | In VXF | Counted |
|---|---|---|---|
| TWLOTwilio Inc | 0.86% | 0.37% | 0.37% |
| CRSCarpenter Technology Corp | 0.84% | 0.36% | 0.36% |
| MKSIMKS Inc | 0.83% | 0.35% | 0.35% |
| CWCurtiss-Wright Corp | 0.77% | 0.33% | 0.33% |
| ATIATI Inc | 0.74% | 0.32% | 0.32% |
| ENTGEntegris Inc | 0.76% | 0.32% | 0.32% |
| NVENT ELECTRIC PLC | 0.76% | 0.32% | 0.32% |
| FTITechnipFMC PLC | 0.73% | 0.31% | 0.31% |
| ILMNIllumina Inc | 0.73% | 0.31% | 0.31% |
| MTZMasTec Inc | 0.71% | 0.30% | 0.30% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in SPMD
Only in VXF
Questions people ask
Is SPMD the same as VXF?
42.3% of their weight sits in the same 398 holdings. SPMD also reports SGI, PR, which the other does not. VXF also reports SPCX, SNOW, BE, which the other does not.
How is the overlap between SPMD and VXF measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 100% of SPMD and 99% of VXF, so the number cannot exceed the smaller coverage.
Which holds more, VXF or SPMD?
SPMD reports 400 stock positions and VXF reports 1,792. 0.9% of SPMD's weight sits in names VXF does not hold, and 56.3% of VXF's weight in names SPMD does not hold. The ten largest positions are 7.7% of SPMD and 7.6% of VXF.
How do SPMD and VXF differ by sector?
The widest gap is Healthcare: VXF has 3.5 points more of it. Sectors come from each holding's SIC code in its SEC record, summed by the weight the fund reports.
Where do the numbers come from?
From each fund's own N-PORT filing to the SEC, which lists every position and its weight. The comparison uses every equity position the fund reports; cash, futures and bonds are not counted, which is why a coverage figure sits next to every result. Holdings change between filings.
Other pairs with these funds
SPMD against other funds in the table
Add a third fund in the tool·All fund pairs
Descriptive data from public SEC filings. Nothing on this page is a recommendation to buy, sell or hold any fund or stock, and holdings change between filings.