IBB vs SCHA: Holdings Overlap
iShares · 254 holdings · $9.3B · as of 2026-03-31
Schwab · 1705 holdings · $23.3B · as of 2026-05-31
Holdings snapshots are 61 days apart (IBB: 2026-03-31, SCHA: 2026-05-31). 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 IBB and SCHA?
iShares Biotechnology ETF (IBB, by iShares) holds 254 positions; Schwab U.S. Small-Cap ETF (SCHA, by Schwab) holds 1705. They have 156 holdings in common, and by portfolio weight the two funds are 7.5% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 7.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 156IBB holds 254 · SCHA holds 1705
- Weight in Shared Holdings
- IBB 28%·SCHA 7%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 IBB
98 of 254 positions (71.4% of the fund) are not held by SCHA. Showing the top 30 by weight.
Sector Breakdown
| Sector | IBB | SCHA |
|---|---|---|
| Health Care | 91.0% | 13.4% |
| Information Technology | 0.0% | 22.1% |
| Industrials | 0.0% | 17.7% |
| Financials | 0.0% | 15.1% |
| Consumer Discretionary | 0.0% | 9.3% |
| Other Sectors | 0.0% | 21.4% |
| Unclassified | 8.9% | 0.8% |
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 (9% of IBB, 1% of SCHA).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IBB | -0.3% | +17.3% | +51.0% | +16.4% | +3.1% | +7.4% | 0.21% |
| SCHA | +1.0% | +22.8% | +36.7% | +17.1% | +7.9% | +10.8% | 1.02% |
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 IBB vs SCHA →
Shared Holdings(156)
The top 10 shared positions account for 34% of the overlap, led by RVMD, IONS and BBIO.
 RVMDRevolution Medicines, Inc. | 1.54% | 0.65% | 0.65% |
|---|---|---|---|
 IONSIonis Pharmaceuticals, Inc. | 1.11% | 0.26% | 0.26% |
 BBIOBridgebio Pharma, Inc. | 1.13% | 0.24% | 0.24% |
 ARWRArrowhead Pharmaceuticals, Inc. | 0.75% | 0.23% | 0.23% |
 CYTKCytokinetics, Inc. | 0.73% | 0.21% | 0.21% |
 AXSMAxsome Therapeutics, Inc. | 0.66% | 0.21% | 0.21% |
 MDGLMadrigal Pharmaceuticals, Inc. | 1.00% | 0.20% | 0.20% |
 PRAXPraxis Precision Medicines, Inc. | 0.77% | 0.19% | 0.19% |
 KRYSKrystal Biotech, Inc. | 0.60% | 0.17% | 0.17% |
 HALOHalozyme Therapeutics, Inc. | 0.69% | 0.17% | 0.17% |
 ALKSAlkermes plc | 0.53% | 0.15% | 0.15% |
 PCVXVaxcyte, Inc. | 0.75% | 0.14% | 0.14% |
 BRKRBruker Corp. | 0.34% | 0.14% | 0.14% |
 PTCTPTC Therapeutics, Inc. | 0.50% | 0.13% | 0.13% |
 PTGXProtagonist Therapeutics, Inc. | 0.58% | 0.12% | 0.12% |
| Nuvalent, Inc., Class A | 0.45% | 0.12% | 0.12% |
 SYRESpyre Therapeutics, Inc. | 0.30% | 0.12% | 0.12% |
 1CGCRISPR Therapeutics AG | 0.39% | 0.11% | 0.11% |
 RYTMRhythm Pharmaceuticals, Inc. | 0.51% | 0.11% | 0.11% |
 COGTCogent Biosciences, Inc. | 0.48% | 0.11% | 0.11% |
 KYMRKymera Therapeutics, Inc. | 0.53% | 0.11% | 0.11% |
 MIRMMirum Pharmaceuticals, Inc. | 0.45% | 0.10% | 0.10% |
 APGEApogee Therapeutics, Inc. | 0.37% | 0.09% | 0.09% |
 CGONCG oncology, Inc. | 0.32% | 0.09% | 0.09% |
 TVTXTravere Therapeutics, Inc. | 0.25% | 0.09% | 0.09% |
Frequently Asked Questions
How much do IBB and SCHA overlap?
IBB and SCHA overlap by 7.5% of portfolio weight. They share 156 holdings (IBB holds 254 positions and SCHA holds 1705), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IBB and SCHA?
The two portfolios are 7.5% 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 IBB and SCHA?
The largest positions held by both funds are RVMD, IONS, BBIO, ARWR and CYTK. Together the top 10 shared positions account for 34% of the total overlap.
What does IBB own that SCHA doesn't?
98 positions (71.4% of IBB) are unique to IBB, led by GILD, AMGN and VRTX. In the other direction, 1549 positions (92.4% of SCHA) are unique to SCHA.