# iShares Biotechnology ETF

iShares Biotechnology ETF is a ETF series of iShares Trust (series S000004350). Net assets $8.1B as of 2026-03-31. Index fund.

## Profile

- Series ID: S000004350
- Registrant: iShares Trust
- LEI: 549300S7IVD88MPK0066
- Net assets: $8.1B
- Total assets: $8.9B
- As of: 2026-03-31
- Type: ETF, Index

## Advisers

- [BlackRock Fund Advisors (Advisor)](https://search.stillhousedata.com/firm/105247)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [BlackRock Funds III](https://search.stillhousedata.com/security/066922519) | — | $784.8M | 966.20% |
| [Gilead Sciences, Inc.](https://search.stillhousedata.com/security/375558103) | — | $629.4M | 774.81% |
| [Amgen, Inc.](https://search.stillhousedata.com/security/031162100) | — | $609.8M | 750.75% |
| [Vertex Pharmaceuticals, Inc.](https://search.stillhousedata.com/security/92532F100) | — | $604.6M | 744.37% |
| [Regeneron Pharmaceuticals, Inc.](https://search.stillhousedata.com/security/75886F107) | — | $585.8M | 721.24% |
| [Alnylam Pharmaceuticals, Inc.](https://search.stillhousedata.com/security/02043Q107) | — | $324.1M | 399.05% |
| [Insmed, Inc.](https://search.stillhousedata.com/security/457669307) | — | $259.7M | 319.66% |
| [Argenx SE](https://search.stillhousedata.com/security/04016X101) | — | $249.7M | 307.36% |
| [Biogen, Inc.](https://search.stillhousedata.com/security/09062X103) | — | $200.0M | 246.25% |
| [Natera, Inc.](https://search.stillhousedata.com/security/632307104) | — | $196.1M | 241.44% |
| [United Therapeutics Corp.](https://search.stillhousedata.com/security/91307C102) | — | $187.1M | 230.33% |
| [BeOne Medicines Ltd.](https://search.stillhousedata.com/security/07725L102) | — | $157.1M | 193.46% |
| [Incyte Corp.](https://search.stillhousedata.com/security/45337C102) | — | $138.2M | 170.09% |
| [Moderna, Inc.](https://search.stillhousedata.com/security/60770K107) | — | $136.8M | 168.39% |
| [Illumina, Inc.](https://search.stillhousedata.com/security/452327109) | — | $136.5M | 168.03% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $8.1B |
| 2025-12-31 | $8.3B |
| 2025-09-30 | $5.9B |
| 2025-06-30 | $5.3B |
| 2025-03-31 | $5.8B |
| 2024-12-31 | $6.5B |
| 2024-09-30 | $7.6B |
| 2024-06-30 | $7.4B |

## More

- [Registrant: iShares Trust](https://search.stillhousedata.com/registrant/1100663)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000004350.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.