ETF Holdings Overlap
How much do two funds actually share? Weight-based overlap, shared positions, and what is unique to each side.
Largest Shared Positions
| Holding | BBH | IBB | Difference |
|---|
| GILD Gilead Sciences Inc |
13.58% | 8.36% |
+5.21% |
| AMGN Amgen Inc |
15.92% | 7.81% |
+8.11% |
| VRTX Vertex Pharmaceuticals Inc |
8.26% | 7.58% |
+0.67% |
| MRNA Moderna Inc |
6.47% | 5.89% |
+0.59% |
| REGN Regeneron Pharmaceuticals… |
6.62% | 5.30% |
+1.32% |
| NTRA Natera Inc |
5.27% | 3.86% |
+1.41% |
| ARGX Argenx Se |
4.09% | 3.28% |
+0.80% |
| ILMN Illumina Inc |
4.08% | 3.00% |
+1.08% |
| RVMD Revolution Medicines Inc |
4.04% | 2.62% |
+1.42% |
| BIIB Biogen Inc |
2.76% | 2.37% |
+0.38% |
| ALNY Alnylam Pharmaceuticals… |
2.56% | 2.22% |
+0.34% |
| ONC Beone Medicines Ltd |
2.75% | 2.14% |
+0.62% |
| UTHR United Therapeutics Corp |
2.30% | 1.63% |
+0.67% |
| INCY Incyte Corp |
2.16% | 1.62% |
+0.54% |
| INSM Insmed Inc |
1.94% | 1.55% |
+0.39% |
| NBIX Neurocrine Biosciences Inc |
1.44% | 1.03% |
+0.42% |
| CRL Charles River… |
1.58% | 1.02% |
+0.56% |
| TECH Bio-Techne Corp |
1.21% | 0.81% |
+0.40% |
| BMRN Biomarin Pharmaceutical… |
1.07% | 0.75% |
+0.32% |
| BNTX Biontech Se |
1.55% | 0.66% |
+0.89% |
Biggest Weighting Differences
| Holding | BBH | IBB | Δ |
|---|
| AMGN |
15.92% | 7.81% |
+8.11% |
| GILD |
13.58% | 8.36% |
+5.21% |
| RVMD |
4.04% | 2.62% |
+1.42% |
| NTRA |
5.27% | 3.86% |
+1.41% |
| REGN |
6.62% | 5.30% |
+1.32% |
| ILMN |
4.08% | 3.00% |
+1.08% |
| BNTX |
1.55% | 0.66% |
+0.89% |
| ARGX |
4.09% | 3.28% |
+0.80% |
| VRTX |
8.26% | 7.58% |
+0.67% |
| UTHR |
2.30% | 1.63% |
+0.67% |
| ONC |
2.75% | 2.14% |
+0.62% |
| MRNA |
6.47% | 5.89% |
+0.59% |
Only in BBH
| IQV Iqvia Holdings Inc |
4.49% |
| GH Guardant Health Inc |
2.91% |
| ICLR Icon Plc |
1.26% |
| QGEN Qiagen Nv |
0.98% |
Only in IBB
| GMAB GENMAB SPONSORED ADR |
1.47% |
| ROIV ROIVANT SCIENCES LTD |
1.33% |
| EXEL EXELIXIS INC |
1.03% |
| ASND ASCENDIS PHARMA |
1.01% |
| MEDP MEDPACE HOLDINGS |
0.99% |
| HALO HALOZYME THERAPEUTICS |
0.89% |
| BBIO BRIDGEBIO PHARMA |
0.82% |
| PCVX VAXCYTE |
0.74% |
| TWST TWIST BIOSCIENCE |
0.73% |
| MDGL MADRIGAL PHARMACEUTICALS |
0.73% |
| TXG 10X GENOMICS CLASS A |
0.67% |
| RGEN REPLIGEN |
0.66% |
| PTGX PROTAGONIST THERAPEUTICS |
0.63% |
| KRYS KRYSTAL BIOTECH |
0.62% |
| CYTK CYTOKINETICS |
0.60% |
Research tool only: overlap is one lens on similarity, not a judgment of which fund is better.