NEEIX Performance — Needham Growth Fund, Institutional Class
Data updated: 2026-08-26
NEEIX returned +65.63% year to date and +90.94% over one year to Jun 2026. Annualised returns are +28.98% over 3 years and +14.50% over 5 years. The fund beat its US Multi-Cap Growth category average: $100 invested three years ago grew to $215, against $164 for the category, and to $191 over one year, against $122. Volatility over the past three years was 27.56% a year. In the 12 months to Jun 2026 the fund took in a net $20.7M, and assets reached $291.65M.
NEEIX Growth of $100
What $100 invested in Needham Growth Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Multi-Cap Growth category average over the same months.
| Period | NEEIX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $191 | $122 |
| 3 years (Jul 2023 – Jun 2026) | $215 | $164 |
| 5 years (Jul 2021 – Jun 2026) | $197 | $145 |
| Since data start (Jan 2020 – Jun 2026) | $323 | $224 |
NEEIX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +65.63% |
| 1 year | +90.94% |
| 3 years (annualised) | +28.98% |
| 5 years (annualised) | +14.50% |
NEEIX Annual Returns
Calendar-year total returns of Needham Growth Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +65.63% |
| 2025 | +9.60% |
| 2024 | +15.00% |
| 2023 | +27.31% |
| 2022 | −33.33% |
| 2021 | +28.17% |
| 2020 | +42.25% |
NEEIX 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 | +14.9% | +7.0% | −5.8% | +17.7% | +11.3% | +9.2% | — | — | — | — | — | — |
| 2025 | +2.2% | −7.5% | −11.2% | −3.6% | +6.0% | +10.8% | +3.6% | −2.2% | +8.2% | +10.0% | −5.2% | +0.9% |
| 2024 | +5.6% | +16.3% | +4.9% | −7.0% | +5.7% | +1.2% | −1.8% | −1.9% | 0.0% | −6.5% | +3.9% | −4.1% |
| 2023 | +8.3% | −1.0% | +1.6% | −7.1% | +14.0% | +7.3% | +7.6% | −9.1% | −5.8% | −10.3% | +12.2% | +10.9% |
| 2022 | −12.7% | −2.4% | +1.0% | −14.2% | +2.3% | −11.4% | +13.4% | −3.5% | −12.5% | +3.6% | +6.8% | −5.9% |
| 2021 | +5.3% | +2.4% | −0.4% | +0.7% | −0.2% | +6.9% | +2.5% | +2.7% | −1.3% | +5.5% | +2.3% | −0.9% |
| 2020 | −0.2% | −5.7% | −13.5% | +16.8% | +7.3% | +4.3% | +9.3% | +1.4% | −1.6% | −0.8% | +17.2% | +5.2% |
NEEIX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 27.56%
- 3-year Sharpe ratio: 0.89 (vs 4.5% risk-free rate)
- Best month: +17.70% (Apr 2026)
- Worst month: −11.23% (Mar 2025)
NEEIX Fund Flows
Monthly money in and out of Needham Growth Fund, from SEC Form N-PORT.
- 12-month net flow: $20.7M
- 12-month gross sales (incl. reinvestments): $68.8M
- Sales ÷ redemptions: 1.43×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $10.0M | $7.2M | $2.8M |
| May 2026 | $15.0M | $3.7M | $11.3M |
| Apr 2026 | $11.5M | $3.3M | $8.2M |
| Mar 2026 | $4.1M | $1.4M | $2.6M |
| Feb 2026 | $4.2M | $756K | $3.4M |
| Jan 2026 | $10.1M | $3.5M | $6.6M |
| Dec 2025 | $118K | $4.7M | −$4.6M |
| Nov 2025 | $11.7M | $3.7M | $7.9M |
| Oct 2025 | $224K | $2.9M | −$2.7M |
| Sep 2025 | $621K | $2.4M | −$1.7M |
| Aug 2025 | $884K | $9.2M | −$8.3M |
| Jul 2025 | $428K | $5.1M | −$4.7M |
NEEIX Assets Under Management
Net assets of Needham Growth Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $291.65M |
| 2026-03-31 | $185.75M |
| 2025-12-31 | $149.83M |
| 2025-09-30 | $152.01M |
| 2025-06-30 | $153.41M |
| 2025-03-31 | $143.25M |
| 2024-12-31 | $192.05M |
| 2024-09-30 | $231.74M |
| 2024-06-30 | $234.21M |
| 2024-03-31 | $207.87M |
| 2023-12-31 | $147.28M |
| 2023-09-30 | $136.33M |
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.