VIOG vs XBI: Holdings Overlap
VIOGVanguard S&P Small-cap 600 Growth Index Fund
Vanguard · 342 holdings · $1.1B · as of 2026-05-31
XBIState Street® SPDR® S&P® Biotech ETF
State Street (SPDR) · 149 holdings · $10.0B · as of 2026-08-06
Holdings snapshots are 67 days apart (VIOG: 2026-05-31, XBI: 2026-08-06). 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 VIOG and XBI?
Vanguard S&P Small-cap 600 Growth Index Fund (VIOG, by Vanguard) holds 342 positions; State Street® SPDR® S&P® Biotech ETF (XBI, by State Street (SPDR)) holds 149. They have 14 holdings in common, and by portfolio weight the two funds are 5.3% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 5.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 14VIOG holds 342 · XBI holds 149
- Weight in Shared Holdings
- VIOG 5%·XBI 10%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 VIOG
328 of 342 positions (94.4% of the fund) are not held by XBI. Showing the top 30 by weight.
Only in XBI
135 of 149 positions (89.8% of the fund) are not held by VIOG. Showing the top 30 by weight.
Sector Breakdown
| Sector | VIOG | XBI |
|---|---|---|
| Health Care | 14.7% | 95.5% |
| Industrials | 21.8% | 0.0% |
| Information Technology | 18.4% | 0.0% |
| Financials | 14.2% | 0.0% |
| Consumer Discretionary | 10.8% | 0.0% |
| Other Sectors | 19.9% | 0.0% |
| Unclassified | 0.0% | 4.6% |
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 (0% of VIOG, 5% of XBI).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| VIOG | +1.1% | +25.9% | +33.8% | +15.2% | +6.8% | +11.2% | 0.75% |
| XBI | -4.0% | +29.2% | +85.3% | +26.3% | +4.5% | +9.5% | 0.36% |
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 VIOG vs XBI →
Shared Holdings(14)
The top 10 shared positions account for 96% of the overlap, led by KRYS, ALKS and PTCT.
 KRYSKrystal Biotech Inc COM | 0.94% | 1.00% | 0.94% |
|---|---|---|---|
 ALKSAlkermes PLC COM USD0.01 | 0.82% | 1.07% | 0.82% |
 PTCTPTC Therapeutics, Inc. COM | 0.70% | 0.93% | 0.70% |
 PTGXProtagonist Therapeutics Inc COM | 0.69% | 1.34% | 0.69% |
 TGTXTG Therapeutics Inc COM | 0.61% | 1.03% | 0.61% |
 VCYTVeracyte Inc COM | 0.43% | 0.67% | 0.43% |
 ACADAcadia Pharmaceuticals Inc COM | 0.32% | 1.10% | 0.32% |
 ADMAAdma Biologics Inc COM | 0.22% | 0.76% | 0.22% |
 VCELVericel Corporation COM | 0.20% | 0.52% | 0.20% |
 RCUSArcus Biosciences Inc. COM | 0.16% | 0.71% | 0.16% |
 SRPTSarepta Therapeutics Inc COM | 0.14% | 0.73% | 0.14% |
 VIRVIR Biotechnology Inc COM | 0.05% | 0.42% | 0.05% |
 2200963DOmniAb Inc. USD0.0001 A (USD12.5 VESTING) | 0.00% | 0.00% | 0.00% |
 2200964DOmniAb Inc. USD0.0001 A (USD15 VESTING) | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
How much do VIOG and XBI overlap?
VIOG and XBI overlap by 5.3% of portfolio weight. They share 14 holdings (VIOG holds 342 positions and XBI holds 149), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VIOG and XBI?
The two portfolios are 5.3% 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 VIOG and XBI?
The largest positions held by both funds are KRYS, ALKS, PTCT, PTGX and TGTX. Together the top 10 shared positions account for 96% of the total overlap.
What does VIOG own that XBI doesn't?
328 positions (94.4% of VIOG) are unique to VIOG, led by SANM, VIAV and VSAT. In the other direction, 135 positions (89.8% of XBI) are unique to XBI.