IJR vs XBI: Holdings Overlap
IJRiShares Core S&P Small-Cap ETF
iShares · 605 holdings · $113.4B · as of 2026-03-31
XBIState Street® SPDR® S&P® Biotech ETF
State Street (SPDR) · 149 holdings · $10.0B · as of 2026-08-06
Holdings snapshots are 128 days apart (IJR: 2026-03-31, 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 IJR and XBI?
iShares Core S&P Small-Cap ETF (IJR, by iShares) holds 605 positions; State Street® SPDR® S&P® Biotech ETF (XBI, by State Street (SPDR)) holds 149. They have 15 holdings in common, and by portfolio weight the two funds are 2.9% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 2.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 15IJR holds 605 · XBI holds 149
- Weight in Shared Holdings
- IJR 3%·XBI 11%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 IJR
590 of 605 positions (95.6% of the fund) are not held by XBI. Showing the top 30 by weight.
Only in XBI
134 of 149 positions (89.4% of the fund) are not held by IJR. Showing the top 30 by weight.
Sector Breakdown
| Sector | IJR | XBI |
|---|---|---|
| Health Care | 11.1% | 95.5% |
| Financials | 17.4% | 0.0% |
| Industrials | 17.1% | 0.0% |
| Consumer Discretionary | 13.2% | 0.0% |
| Information Technology | 12.7% | 0.0% |
| Other Sectors | 26.0% | 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 IJR, 5% of XBI).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IJR | +2.4% | +24.5% | +36.4% | +14.5% | +7.7% | +10.9% | 1.10% |
| 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 IJR vs XBI →
Shared Holdings(15)
The top 10 shared positions account for 92% of the overlap, led by KRYS, PTGX and ALKS.
 KRYSKrystal Biotech Inc COM | 0.44% | 1.00% | 0.44% |
|---|---|---|---|
 PTGXProtagonist Therapeutics Inc COM | 0.40% | 1.34% | 0.40% |
 ALKSAlkermes PLC COM USD0.01 | 0.38% | 1.07% | 0.38% |
 PTCTPTC Therapeutics, Inc. COM | 0.36% | 0.93% | 0.36% |
 TGTXTG Therapeutics Inc COM | 0.29% | 1.03% | 0.29% |
 ACADAcadia Pharmaceuticals Inc COM | 0.18% | 1.10% | 0.18% |
 VCYTVeracyte Inc COM | 0.17% | 0.67% | 0.17% |
 SRPTSarepta Therapeutics Inc COM | 0.15% | 0.73% | 0.15% |
 ADMAAdma Biologics Inc COM | 0.14% | 0.76% | 0.14% |
 RCUSArcus Biosciences Inc. COM | 0.12% | 0.71% | 0.12% |
 VCELVericel Corporation COM | 0.11% | 0.52% | 0.11% |
 VIRVIR Biotechnology Inc COM | 0.07% | 0.42% | 0.07% |
 XNCRXencor Inc COM | 0.06% | 0.38% | 0.06% |
 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 IJR and XBI overlap?
IJR and XBI overlap by 2.9% of portfolio weight. They share 15 holdings (IJR holds 605 positions and XBI holds 149), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IJR and XBI?
The two portfolios are 2.9% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IJR and XBI?
The largest positions held by both funds are KRYS, PTGX, ALKS, PTCT and TGTX. Together the top 10 shared positions account for 92% of the total overlap.
What does IJR own that XBI doesn't?
590 positions (95.6% of IJR) are unique to IJR, led by EMN, ESI and PRIM. In the other direction, 134 positions (89.4% of XBI) are unique to XBI.