SPSM vs VBK: Holdings Overlap
SPSMState Street® SPDR® Portfolio S&P 600™ Small Cap ETF
State Street (SPDR) · 604 holdings · $17.3B · as of 2026-08-06
VBKVanguard Small-cap Growth Index Fund
Vanguard · 551 holdings · $24.3B · as of 2026-03-31
Holdings snapshots are 128 days apart (SPSM: 2026-08-06, VBK: 2026-03-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are SPSM and VBK?
State Street® SPDR® Portfolio S&P 600™ Small Cap ETF (SPSM, by State Street (SPDR)) holds 604 positions; Vanguard Small-cap Growth Index Fund (VBK, by Vanguard) holds 551. They have 163 holdings in common, and by portfolio weight the two funds are 15.1% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 15.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 163SPSM holds 604 · VBK holds 551
- Weight in Shared Holdings
- SPSM 34%·VBK 15%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in SPSM
441 of 604 positions (66.1% of the fund) are not held by VBK. Showing the top 30 by weight.
Sector Breakdown
| Sector | SPSM | VBK |
|---|---|---|
| Industrials | 17.4% | 24.6% |
| Information Technology | 12.8% | 21.6% |
| Financials | 19.0% | 6.1% |
| Health Care | 10.6% | 16.1% |
| Consumer Discretionary | 13.9% | 9.9% |
| Other Sectors | 25.1% | 20.6% |
| Unclassified | 0.9% | 0.9% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (1% of SPSM, 1% of VBK).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SPSM | +2.4% | +24.5% | +36.5% | +14.6% | +7.7% | +10.9% | 1.36% |
| VBK | +1.8% | +19.6% | +29.4% | +16.6% | +5.3% | +11.4% | 0.42% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in SPSM vs VBK →
Shared Holdings(163)
The top 10 shared positions account for 15% of the overlap, led by FORM, ESE and MTCH.
 FORMFormfactor Inc COM | 0.49% | 0.25% | 0.25% |
|---|---|---|---|
 ESEESCO Technologies Inc. COM | 0.46% | 0.24% | 0.24% |
 MTCHMatch Group Inc COM | 0.47% | 0.24% | 0.24% |
 AWIArmstrong World Industries, Inc. COM | 0.43% | 0.24% | 0.24% |
 PTGXProtagonist Therapeutics Inc COM | 0.48% | 0.22% | 0.22% |
 JBTMJBT Marel Corp. COM | 0.35% | 0.22% | 0.22% |
 FSSFederal Signal Corp. COM | 0.43% | 0.22% | 0.22% |
 EPRTEssential Properties Realty Trust Inc. COM | 0.36% | 0.21% | 0.21% |
 NENoble Corporation PLC ORD SHS A | 0.28% | 0.21% | 0.21% |
 EATBrinker International, Inc. COM | 0.53% | 0.21% | 0.21% |
 IBPInstalled Building Products Inc COM | 0.30% | 0.20% | 0.20% |
 GKOSGlaukos Corp. COM | 0.55% | 0.20% | 0.20% |
 ALKSAlkermes PLC COM USD0.01 | 0.44% | 0.20% | 0.20% |
 MKTXMarketAxess Holdings Inc. COM | 0.32% | 0.20% | 0.20% |
 MSGSMadison Square Garden Sports Corp. CL A | 0.39% | 0.19% | 0.19% |
 PTCTPTC Therapeutics, Inc. COM | 0.32% | 0.19% | 0.19% |
 PAYCPaycom Software Inc COM | 0.49% | 0.19% | 0.19% |
 RHPRyman Hospitality Properties Inc COM | 0.43% | 0.18% | 0.18% |
 BCPCBalchem Corp COM | 0.32% | 0.18% | 0.18% |
 SNEXStoneX Group Inc COM | 0.39% | 0.18% | 0.18% |
 CNRCore Natural Resources Inc. COM SHS | 0.25% | 0.17% | 0.17% |
 TGTXTG Therapeutics Inc COM | 0.36% | 0.17% | 0.17% |
 CWSTCasella Waste Systems, Inc., Class A | 0.31% | 0.17% | 0.17% |
 ROADConstruction Partners, Inc., Class A | 0.26% | 0.16% | 0.16% |
 ETSYEtsy Inc COM | 0.43% | 0.15% | 0.15% |
Frequently Asked Questions
How much do SPSM and VBK overlap?
SPSM and VBK overlap by 15.1% of portfolio weight. They share 163 holdings (SPSM holds 604 positions and VBK holds 551), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPSM and VBK?
The two portfolios are 15.1% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of SPSM and VBK?
The largest positions held by both funds are FORM, ESE, MTCH, AWI and PTGX. Together the top 10 shared positions account for 15% of the total overlap.
What does SPSM own that VBK doesn't?
441 positions (66.1% of SPSM) are unique to SPSM, led by VSAT, JXN and ESI. In the other direction, 388 positions (84.7% of VBK) are unique to VBK.