IBB vs KOMP: Holdings Overlap
iShares · 254 holdings · $9.3B · as of 2026-03-31
KOMPState Street® SPDR® S&P Kensho New Economies Composite ETF
State Street (SPDR) · 501 holdings · $2.6B · as of 2026-08-06
Holdings snapshots are 128 days apart (IBB: 2026-03-31, KOMP: 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 IBB and KOMP?
iShares Biotechnology ETF (IBB, by iShares) holds 254 positions; State Street® SPDR® S&P Kensho New Economies Composite ETF (KOMP, by State Street (SPDR)) holds 501. They have 49 holdings in common, and by portfolio weight the two funds are 4.1% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 4.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 49IBB holds 254 · KOMP holds 501
- Weight in Shared Holdings
- IBB 36%·KOMP 6%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
205 of 254 positions (64.0% of the fund) are not held by KOMP. Showing the top 30 by weight.
Only in KOMP
452 of 501 positions (93.5% of the fund) are not held by IBB. Showing the top 30 by weight.
Sector Breakdown
| Sector | IBB | KOMP |
|---|---|---|
| Health Care | 91.0% | 12.4% |
| Information Technology | 0.0% | 29.9% |
| Industrials | 0.0% | 27.4% |
| Consumer Discretionary | 0.0% | 4.3% |
| Communication Services | 0.0% | 3.6% |
| Other Sectors | 0.0% | 7.9% |
| Unclassified | 8.9% | 14.3% |
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, 14% of KOMP).
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% |
| KOMP | +3.5% | +18.5% | +29.5% | +17.6% | +3.3% | — | 1.47% |
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 KOMP →
Shared Holdings(49)
The top 10 shared positions account for 44% of the overlap, led by ALKS, BRKR and TWST.
 ALKSAlkermes PLC COM USD0.01 | 0.53% | 0.35% | 0.35% |
|---|---|---|---|
 BRKRBruker Corporation COM | 0.34% | 0.86% | 0.34% |
 TWSTTwist Bioscience Corporation COM | 0.26% | 1.12% | 0.26% |
 CRLCharles River Laboratories International, Inc. COM | 0.77% | 0.25% | 0.25% |
 TECHBio-Techne Corp COM | 0.74% | 0.12% | 0.12% |
 IOVAIovance Biotherapeutics Inc COM | 0.11% | 0.14% | 0.11% |
 GRFSGrifols SA | 0.10% | 0.10% | 0.10% |
 ARWRArrowhead Pharmaceuticals Inc COM | 0.75% | 0.10% | 0.10% |
 TSHATaysha Gene Therapies Inc. COM SHS | 0.09% | 0.10% | 0.09% |
 1CGCRISPR Therapeutics AG COM CHF0.03 | 0.39% | 0.09% | 0.09% |
 MRNAModerna Inc COM | 1.68% | 0.09% | 0.09% |
 RAREUltragenyx Pharmaceuticals Inc COM | 0.18% | 0.09% | 0.09% |
 SRPTSarepta Therapeutics Inc COM | 0.20% | 0.09% | 0.09% |
 BNTXBioNTech SE, ADR | 0.66% | 0.09% | 0.09% |
 BEAMBeam Therapeutics Inc. COM | 0.20% | 0.09% | 0.09% |
 VRTXVertex Pharmaceuticals Incorporated COM | 7.44% | 0.08% | 0.08% |
 WVEWave Life Sciences Ltd. COM NPV | 0.10% | 0.08% | 0.08% |
 QUREuniQure NV | 0.08% | 0.14% | 0.08% |
 NVAXNovavax Inc COM NEW | 0.12% | 0.08% | 0.08% |
 BIIBBiogen Inc COM | 2.46% | 0.08% | 0.08% |
 KRYSKrystal Biotech Inc COM | 0.60% | 0.08% | 0.08% |
 NTLAIntellia Therapeutics Inc COM | 0.13% | 0.08% | 0.08% |
 VIRVIR Biotechnology Inc COM | 0.08% | 0.09% | 0.08% |
 NTRANatera Inc. COM | 2.41% | 0.08% | 0.08% |
 XNCRXencor Inc COM | 0.08% | 0.14% | 0.08% |
Frequently Asked Questions
How much do IBB and KOMP overlap?
IBB and KOMP overlap by 4.1% of portfolio weight. They share 49 holdings (IBB holds 254 positions and KOMP holds 501), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IBB and KOMP?
The two portfolios are 4.1% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IBB and KOMP?
The largest positions held by both funds are ALKS, BRKR, TWST, CRL and TECH. Together the top 10 shared positions account for 44% of the total overlap.
What does IBB own that KOMP doesn't?
205 positions (64.0% of IBB) are unique to IBB, led by GILD, AMGN and INSM. In the other direction, 452 positions (93.5% of KOMP) are unique to KOMP.