IWB Performance — iShares Russell 1000 ETF
Data updated: 2026-08-24
IWB returned +10.26% year to date and +21.87% over one year to Jun 2026. Annualised returns are +20.32% over 3 years and +12.52% over 5 years. The fund beat its US Large Blend category average: $100 invested three years ago grew to $174, against $157 for the category, and to $122 over one year, against $118. Volatility over the past three years was 13.20% a year. In the 12 months to Jun 2026 the fund lost a net $1.4B, and assets reached $48.33B.
IWB Growth of $100
What $100 invested in iShares Russell 1000 ETF grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Large Blend category average over the same months.
| Period | IWB | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $122 | $118 |
| 3 years (Jul 2023 – Jun 2026) | $174 | $157 |
| 5 years (Jul 2021 – Jun 2026) | $180 | $161 |
| Since data start (Jul 2019 – Jun 2026) | $277 | $229 |
IWB Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +10.26% |
| 1 year | +21.87% |
| 3 years (annualised) | +20.32% |
| 5 years (annualised) | +12.52% |
IWB Annual Returns
Calendar-year total returns of iShares Russell 1000 ETF, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +10.26% |
| 2025 | +17.20% |
| 2024 | +24.34% |
| 2023 | +26.41% |
| 2022 | −19.23% |
| 2021 | +26.27% |
| 2020 | +20.80% |
| 2019 (Jul–Dec) | +10.51% |
IWB Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +1.4% | −0.5% | −5.0% | +10.1% | +5.1% | −0.5% | — | — | — | — | — | — |
| 2025 | +3.2% | −1.8% | −5.8% | −0.6% | +6.4% | +5.1% | +2.2% | +2.1% | +3.5% | +2.1% | +0.2% | 0.0% |
| 2024 | +1.4% | +5.4% | +3.2% | −4.3% | +4.7% | +3.3% | +1.5% | +2.4% | +2.1% | −0.7% | +6.4% | −2.8% |
| 2023 | +6.7% | −2.4% | +3.1% | +1.2% | +0.4% | +6.7% | +3.4% | −1.8% | −4.7% | −2.4% | +9.4% | +4.9% |
| 2022 | −5.7% | −2.8% | +3.4% | −8.9% | −0.2% | −8.4% | +9.3% | −3.9% | −9.3% | +8.0% | +5.4% | −5.8% |
| 2021 | −0.8% | +2.9% | +3.8% | +5.4% | +0.5% | +2.5% | +2.1% | +2.9% | −4.6% | +6.9% | −1.4% | +4.0% |
| 2020 | +0.1% | −8.2% | −13.2% | +13.2% | +5.3% | +2.2% | +5.8% | +7.3% | −3.7% | −2.4% | +11.8% | +4.2% |
| 2019 | — | — | — | — | — | — | +1.5% | −1.8% | +1.7% | +2.1% | +3.8% | +2.9% |
IWB Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 13.20%
- 3-year Sharpe ratio: 1.20 (vs 4.5% risk-free rate)
- Best month: +10.09% (Apr 2026)
- Worst month: −5.80% (Mar 2025)
IWB Fund Flows
Monthly money in and out of iShares Russell 1000 ETF, from SEC Form N-PORT.
- 12-month net flow: −$1.4B
- 12-month gross sales (incl. reinvestments): $15.9B
- Sales ÷ redemptions: 0.92×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $691.3M | $867.4M | −$176.1M |
| May 2026 | $483.7M | $179.6M | $304.1M |
| Apr 2026 | $814.1M | $1.7B | −$849.7M |
| Mar 2026 | $1.8B | $2.9B | −$1.1B |
| Feb 2026 | $582.0M | $733.9M | −$151.8M |
| Jan 2026 | $1.2B | $1.4B | −$188.7M |
| Dec 2025 | $2.7B | $1.7B | $952.9M |
| Nov 2025 | $1.4B | $979.5M | $435.6M |
| Oct 2025 | $2.6B | $2.6B | −$34.4M |
| Sep 2025 | $1.6B | $1.9B | −$290.9M |
| Aug 2025 | $1.1B | $1.4B | −$255.9M |
| Jul 2025 | $936.2M | $976.3M | −$40.0M |
IWB Assets Under Management
Net assets of iShares Russell 1000 ETF by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $48.33B |
| 2026-03-31 | $42.78B |
| 2025-12-31 | $46.28B |
| 2025-09-30 | $44.00B |
| 2025-06-30 | $41.43B |
| 2025-03-31 | $37.15B |
| 2024-12-31 | $40.10B |
| 2024-09-30 | $37.85B |
| 2024-06-30 | $37.56B |
| 2024-03-31 | $35.42B |
| 2023-12-31 | $32.56B |
| 2023-09-30 | $29.12B |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.