SLYG vs XBI: Holdings Overlap
SLYGState Street® SPDR® S&P 600™ Small Cap Growth ETF
State Street (SPDR) · 349 holdings · $5.3B · as of 2026-08-06
XBIState Street® SPDR® S&P® Biotech ETF
State Street (SPDR) · 149 holdings · $10.0B · as of 2026-08-06
How similar are SLYG and XBI?
State Street® SPDR® S&P 600™ Small Cap Growth ETF (SLYG, by State Street (SPDR)) holds 349 positions; State Street® SPDR® S&P® Biotech ETF (XBI, by State Street (SPDR)) holds 149. They have 13 holdings in common, and by portfolio weight the two funds are 4.9% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 4.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 13SLYG holds 349 · XBI holds 149
- Weight in Shared Holdings
- SLYG 5%·XBI 9%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 SLYG
336 of 349 positions (94.8% of the fund) are not held by XBI. Showing the top 30 by weight.
Only in XBI
136 of 149 positions (90.8% of the fund) are not held by SLYG. Showing the top 30 by weight.
Sector Breakdown
| Sector | SLYG | XBI |
|---|---|---|
| Health Care | 15.0% | 95.5% |
| Industrials | 21.9% | 0.0% |
| Financials | 15.7% | 0.0% |
| Information Technology | 13.8% | 0.0% |
| Consumer Discretionary | 12.0% | 0.0% |
| Other Sectors | 20.6% | 0.0% |
| Unclassified | 0.9% | 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 (1% of SLYG, 5% of XBI).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SLYG | +1.2% | +25.9% | +33.5% | +15.2% | +6.7% | +11.2% | 0.64% |
| 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 SLYG vs XBI →
Shared Holdings(13)
The top 10 shared positions account for 99% of the overlap, led by PTGX, ALKS and TGTX.
 PTGXProtagonist Therapeutics Inc COM | 0.99% | 1.34% | 0.99% |
|---|---|---|---|
 ALKSAlkermes PLC COM USD0.01 | 0.90% | 1.07% | 0.90% |
 TGTXTG Therapeutics Inc COM | 0.73% | 1.03% | 0.73% |
 PTCTPTC Therapeutics, Inc. COM | 0.66% | 0.93% | 0.66% |
 VCYTVeracyte Inc COM | 0.41% | 0.67% | 0.41% |
 ACADAcadia Pharmaceuticals Inc COM | 0.40% | 1.10% | 0.40% |
 ADMAAdma Biologics Inc COM | 0.26% | 0.76% | 0.26% |
 VCELVericel Corporation COM | 0.26% | 0.52% | 0.26% |
 RCUSArcus Biosciences Inc. COM | 0.17% | 0.71% | 0.17% |
 SRPTSarepta Therapeutics Inc COM | 0.12% | 0.73% | 0.12% |
 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 SLYG and XBI overlap?
SLYG and XBI overlap by 4.9% of portfolio weight. They share 13 holdings (SLYG holds 349 positions and XBI holds 149), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SLYG and XBI?
The two portfolios are 4.9% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of SLYG and XBI?
The largest positions held by both funds are PTGX, ALKS, TGTX, PTCT and VCYT. Together the top 10 shared positions account for 99% of the total overlap.
What does SLYG own that XBI doesn't?
336 positions (94.8% of SLYG) are unique to SLYG, led by VSAT, CORT and EAT. In the other direction, 136 positions (90.8% of XBI) are unique to XBI.