Biotech (iShares).
We resolve 93% of IBB’s reported NAV to covered tickers; the remaining ~7% is cash, non-equity, foreign lines and names we don’t cover — the honest tail of a CUSIP-based resolution, not a data gap you should read as holdings we hid.
Covered positions by weight, as of 2026-03-31. Each links to its stock page and our full verdict.
| # | Holding | Our call | % of NAV | Value |
|---|---|---|---|---|
| 1 | GILD | Hold | 7.75% | $629M |
| 2 | AMGN | Hold | 7.51% | $610M |
| 3 | VRTX | Hold | 7.44% | $605M |
| 4 | REGN | Hold | 7.21% | $586M |
| 5 | ALNY | Buy | 3.99% | $324M |
| 6 | INSM | Hold | 3.20% | $260M |
| 7 | ARGX | — | 3.07% | $250M |
| 8 | BIIB | Hold | 2.46% | $200M |
| 9 | NTRA | Hold | 2.41% | $196M |
| 10 | UTHR | Buy | 2.30% | $187M |
| 11 | ONC | Hold | 1.93% | $157M |
| 12 | INCY | Hold | 1.70% | $138M |
| 13 | MRNA | Avoid | 1.68% | $137M |
| 14 | ILMN | Hold | 1.68% | $136M |
| 15 | RVMD | Avoid | 1.54% | $125M |
| 16 | NBIX | Buy | 1.18% | $95.8M |
| 17 | GMAB | — | 1.17% | $95.4M |
| 18 | BBIO | Hold | 1.13% | $92.0M |
| 19 | IONS | Buy | 1.11% | $90.5M |
| 20 | MEDP | Buy | 1.00% | $81.6M |
| 21 | MDGL | Buy | 1.00% | $81.3M |
| 22 | EXEL | Buy | 0.99% | $80.3M |
| 23 | BMRN | Buy | 0.98% | $79.8M |
| 24 | PRAX | Avoid | 0.77% | $62.9M |
| 25 | CRL | Hold | 0.77% | $62.5M |
| 26 | ARWR | Hold | 0.75% | $61.1M |
| 27 | PCVX | Avoid | 0.75% | $60.8M |
| 28 | TECH | Hold | 0.74% | $60.2M |
| 29 | CYTK | Avoid | 0.73% | $59.1M |
| 30 | HALO | Buy | 0.69% | $56.1M |
| 31 | AXSM | Buy | 0.66% | $53.9M |
| 32 | BNTX | — | 0.66% | $53.3M |
| 33 | KRYS | Buy | 0.60% | $48.8M |
| 34 | PTGX | Hold | 0.58% | $47.1M |
| 35 | RGEN | Hold | 0.58% | $46.8M |
| 36 | KYMR | Hold | 0.53% | $43.4M |
| 37 | RYTM | Hold | 0.51% | $41.3M |
| 38 | ABVX | — | 0.50% | $40.9M |
| 39 | PTCT | Hold | 0.50% | $40.4M |
| 40 | COGT | Hold | 0.48% | $38.9M |
| 41 | NUVL | Hold | 0.45% | $36.4M |
| 42 | MIRM | Buy | 0.45% | $36.3M |
| 43 | TEM | Hold | 0.43% | $35.0M |
| 44 | XENE | Hold | 0.43% | $34.8M |
| 45 | APGE | Hold | 0.37% | $29.8M |
| 46 | SRRK | Hold | 0.36% | $29.2M |
| 47 | ACAD | — | 0.34% | $27.9M |
| 48 | BRKR | Hold | 0.34% | $27.6M |
| 49 | CRNX | Hold | 0.32% | $26.4M |
| 50 | CGON | Avoid | 0.32% | $25.7M |
| 51 | SYRE | Hold | 0.30% | $24.2M |
| 52 | ERAS | Avoid | 0.28% | $22.4M |
| 53 | TARS | — | 0.26% | $20.9M |
| 54 | TWST | Hold | 0.26% | $20.8M |
| 55 | CNTA | — | 0.25% | $20.7M |
| 56 | IDYA | — | 0.25% | $20.5M |
| 57 | DNLI | — | 0.25% | $20.3M |
| 58 | TVTX | Hold | 0.25% | $20.0M |
| 59 | IBRX | Avoid | 0.24% | $19.7M |
| 60 | ARQT | — | 0.24% | $19.2M |
| 61 | GPCR | — | 0.23% | $18.4M |
| 62 | EWTX | Hold | 0.22% | $18.0M |
| 63 | TXG | Hold | 0.22% | $17.9M |
| 64 | LEGN | — | 0.22% | $17.8M |
| 65 | DYN | — | 0.20% | $16.6M |
| 66 | BEAM | — | 0.20% | $16.5M |
| 67 | BCRX | — | 0.20% | $16.3M |
| 68 | KOD | — | 0.20% | $16.1M |
| 69 | SRPT | — | 0.20% | $16.1M |
| 70 | CAI | Buy | 0.20% | $16.1M |
| 71 | IMVT | Avoid | 0.19% | $15.6M |
| 72 | ADMA | — | 0.19% | $15.4M |
| 73 | ADPT | — | 0.19% | $15.4M |
| 74 | SMMT | Avoid | 0.19% | $15.2M |
| 75 | ORKA | Avoid | 0.18% | $14.9M |
| 76 | SNDX | — | 0.18% | $14.8M |
| 77 | TNGX | Avoid | 0.18% | $14.4M |
| 78 | RARE | — | 0.18% | $14.3M |
| 79 | IRON | — | 0.17% | $13.7M |
| 80 | AGIO | — | 0.17% | $13.5M |
| 81 | GRAL | — | 0.17% | $13.5M |
| 82 | DFTX | Avoid | 0.16% | $13.3M |
| 83 | ZYME | — | 0.16% | $13.3M |
| 84 | RCUS | — | 0.16% | $13.2M |
| 85 | AUPH | — | 0.16% | $13.0M |
| 86 | ELVN | — | 0.16% | $12.6M |
| 87 | VCEL | — | 0.15% | $12.0M |
| 88 | MLYS | — | 0.15% | $11.9M |
| 89 | ALMS | — | 0.14% | $11.7M |
| 90 | ZLAB | — | 0.14% | $11.5M |
| 91 | NRIX | — | 0.14% | $11.2M |
| 92 | STOK | — | 0.13% | $10.8M |
| 93 | NTLA | — | 0.13% | $10.7M |
| 94 | ANAB | — | 0.13% | $10.7M |
| 95 | RXRX | — | 0.13% | $10.5M |
| 96 | TYRA | — | 0.13% | $10.4M |
| 97 | RLAY | — | 0.12% | $9.75M |
| 98 | AMLX | — | 0.12% | $9.56M |
| 99 | NVAX | — | 0.12% | $9.42M |
| 100 | IOVA | — | 0.11% | $9.19M |
| 101 | IMCR | — | 0.10% | $8.36M |
| 102 | LKFT | — | 0.10% | $8.16M |
| 103 | GRFS | — | 0.10% | $7.83M |
| 104 | NUVB | — | 0.09% | $7.70M |
| 105 | ATAI | — | 0.09% | $7.65M |
| 106 | TSHA | — | 0.09% | $7.47M |
| 107 | SION | — | 0.09% | $7.42M |
| 108 | TRVI | — | 0.09% | $7.26M |
| 109 | MESO | — | 0.09% | $7.08M |
| 110 | CRVS | — | 0.09% | $6.92M |
| 111 | GERN | — | 0.08% | $6.72M |
| 112 | FTRE | — | 0.08% | $6.53M |
| 113 | VIR | — | 0.08% | $6.31M |
| 114 | XNCR | — | 0.08% | $6.19M |
| 115 | ABCL | — | 0.07% | $6.04M |
| 116 | MBX | — | 0.07% | $5.96M |
| 117 | MAZE | — | 0.07% | $5.91M |
| 118 | GLUE | — | 0.07% | $5.70M |
| 119 | KALV | — | 0.07% | $5.57M |
| 120 | JANX | — | 0.07% | $5.45M |
| 121 | MNKD | — | 0.07% | $5.39M |
| 122 | KURA | — | 0.06% | $5.11M |
| 123 | INBX | — | 0.06% | $5.10M |
| 124 | ABUS | — | 0.06% | $5.04M |
| 125 | SEPN | — | 0.06% | $4.83M |
| 126 | ANRO | — | 0.06% | $4.78M |
| 127 | BCAX | — | 0.06% | $4.71M |
| 128 | AVBP | — | 0.06% | $4.64M |
| 129 | CTMX | — | 0.06% | $4.64M |
| 130 | CGEM | — | 0.06% | $4.60M |
| 131 | REPL | — | 0.05% | $4.37M |
| 132 | PGEN | — | 0.05% | $4.28M |
| 133 | ARVN | — | 0.05% | $4.27M |
| 134 | SVRA | — | 0.05% | $4.23M |
| 135 | IRWD | — | 0.05% | $4.12M |
| 136 | PHAT | — | 0.05% | $3.97M |
| 137 | ZVRA | — | 0.05% | $3.86M |
| 138 | CTKB | — | 0.05% | $3.80M |
| 139 | SPRY | — | 0.05% | $3.72M |
| 140 | SANA | — | 0.04% | $3.56M |
| 141 | RIGL | — | 0.04% | $3.54M |
| 142 | ZBIO | — | 0.04% | $3.44M |
| 143 | CMPS | — | 0.04% | $3.39M |
| 144 | FULC | — | 0.04% | $3.29M |
| 145 | OPK | — | 0.04% | $3.29M |
| 146 | SLDB | — | 0.04% | $3.22M |
| 147 | FDMT | — | 0.04% | $3.15M |
| 148 | EBS | — | 0.04% | $3.12M |
| 149 | MYGN | — | 0.04% | $2.98M |
| 150 | ABSI | — | 0.04% | $2.93M |
| 151 | BBOT | — | 0.04% | $2.90M |
| 152 | CATX | — | 0.04% | $2.89M |
| 153 | ALT | — | 0.04% | $2.85M |
| 154 | VNDA | — | 0.03% | $2.80M |
| 155 | ALLO | — | 0.03% | $2.80M |
| 156 | RGNX | — | 0.03% | $2.78M |
| 157 | RCKT | — | 0.03% | $2.69M |
| 158 | PACB | — | 0.03% | $2.67M |
| 159 | LXEO | — | 0.03% | $2.63M |
| 160 | CTNM | — | 0.03% | $2.62M |
| 161 | LCTX | — | 0.03% | $2.56M |
| 162 | LAB | — | 0.03% | $2.53M |
| 163 | DSGN | — | 0.03% | $2.51M |
| 164 | PSNL | — | 0.03% | $2.50M |
| 165 | AVIR | — | 0.03% | $2.48M |
| 166 | PRME | — | 0.03% | $2.45M |
| 167 | FLGT | — | 0.03% | $2.37M |
| 168 | TECX | — | 0.03% | $2.35M |
| 169 | AURA | — | 0.03% | $2.26M |
| 170 | KYTX | — | 0.03% | $2.17M |
| 171 | MRVI | — | 0.03% | $2.15M |
| 172 | IMRX | — | 0.03% | $2.06M |
| 173 | AVXL | — | 0.03% | $2.05M |
| 174 | UPB | — | 0.02% | $1.92M |
| 175 | NGNE | — | 0.02% | $1.91M |
| 176 | LENZ | — | 0.02% | $1.89M |
| 177 | AUTL | — | 0.02% | $1.82M |
| 178 | EDIT | — | 0.02% | $1.81M |
| 179 | CABA | — | 0.02% | $1.70M |
| 180 | CCCC | — | 0.02% | $1.60M |
| 181 | LRMR | — | 0.02% | $1.58M |
| 182 | CADL | — | 0.02% | $1.45M |
| 183 | ARCT | — | 0.02% | $1.44M |
| 184 | OABI | — | 0.02% | $1.37M |
| 185 | NBP | — | 0.02% | $1.33M |
| 186 | VYGR | — | 0.02% | $1.27M |
| 187 | BCYC | — | 0.01% | $1.13M |
| 188 | CRBU | — | 0.01% | $1.13M |
| 189 | CDXS | — | 0.01% | $1.11M |
| 190 | LYEL | — | 0.01% | $1.09M |
| 191 | CLLS | — | 0.01% | $1.08M |
| 192 | QTRX | — | 0.01% | $1.00M |
| 193 | QSI | — | 0.01% | $947K |
| 194 | SLN | — | 0.01% | $913K |
| 195 | TNYA | — | 0.01% | $831K |
| 196 | PEPG | — | 0.01% | $799K |
| 197 | HUMA | — | 0.01% | $741K |
| 198 | BDTX | — | 0.01% | $685K |
| 199 | GOSS | — | 0.01% | $496K |
| 200 | AARD | — | 0.00% | $338K |
| 201 | IMMP | — | 0.00% | $284K |
| 202 | TKNO | — | 0.00% | $230K |
Source: SEC Form N-PORT-P (the fund’s latest public fiscal-quarter-end report, filed ~2 months after the period). Weights and values are as reported in the filing — a delayed snapshot, not a live book. Positions are resolved to tickers via the filing’s identifiers and CUSIP mapping; unresolved lines are excluded. “Our call” is TENK/calls’s independent SEC-grounded verdict, not the fund’s view. No market-price data is used on this page.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.