LADFX Performance — Lord Abbett Developing Growth Fund INC, Class F
Data updated: 2026-10-09
LADFX returned +18.86% year to date and +34.50% over one year to Jul 2026. Annualised returns are +16.78% over 3 years and +1.86% over 5 years. The fund beat its US Mid-Cap Growth category average: $100 invested three years ago grew to $159, against $139 for the category, and to $135 over one year, against $110. Volatility over the past three years was 24.66% a year. In the 12 months to Jul 2026 the fund lost a net $355.5M, and assets reached $2.22B.
LADFX Growth of $100
What $100 invested in Lord Abbett Developing Growth Fund INC grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Growth category average over the same months.
| Period | LADFX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $135 | $110 |
| 3 years (Aug 2023 – Jul 2026) | $159 | $139 |
| 5 years (Aug 2021 – Jul 2026) | $110 | $121 |
| Since data start (Aug 2019 – Jul 2026) | $180 | $189 |
LADFX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +18.86% |
| 1 year | +34.50% |
| 3 years (annualised) | +16.78% |
| 5 years (annualised) | +1.86% |
LADFX Annual Returns
Calendar-year total returns of Lord Abbett Developing Growth Fund INC, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +18.86% |
| 2025 | +14.51% |
| 2024 | +22.12% |
| 2023 | +8.61% |
| 2022 | −35.98% |
| 2021 | −2.54% |
| 2020 | +72.82% |
| 2019 (Aug–Dec) | −7.44% |
LADFX 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 | +3.8% | +0.1% | −4.2% | +17.6% | +11.7% | +5.8% | −14.1% | — | — | — | — | — |
| 2025 | +1.8% | −10.5% | −9.7% | +3.9% | +6.5% | +8.7% | +2.2% | +6.1% | +4.9% | +4.6% | +0.1% | −2.9% |
| 2024 | +0.5% | +9.3% | +2.5% | −6.0% | +4.3% | +3.0% | 0.0% | +3.8% | +2.4% | −0.9% | +9.3% | −6.8% |
| 2023 | +8.3% | −0.9% | +0.9% | −2.5% | +1.7% | +4.2% | +1.3% | −6.8% | −7.7% | −8.6% | +10.5% | +10.3% |
| 2022 | −18.7% | 0.0% | −0.7% | −13.4% | −2.8% | −6.3% | +9.6% | −0.2% | −8.0% | +6.2% | +0.3% | −6.2% |
| 2021 | +4.3% | +3.8% | −6.0% | +4.5% | −6.1% | +4.9% | −1.9% | +2.6% | −4.3% | +5.6% | −8.2% | −0.4% |
| 2020 | +2.2% | −3.9% | −15.4% | +16.6% | +13.4% | +6.4% | +6.6% | +5.8% | +2.8% | +2.4% | +13.0% | +10.1% |
| 2019 | — | — | — | — | — | — | — | −5.3% | −9.1% | +2.2% | +3.6% | +1.5% |
LADFX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 24.66%
- 3-year Sharpe ratio: 0.50 (vs 4.5% risk-free rate)
- Best month: +17.65% (Apr 2026)
- Worst month: −14.09% (Jul 2026)
LADFX Fund Flows
Monthly money in and out of Lord Abbett Developing Growth Fund INC, from SEC Form N-PORT.
- 12-month net flow: −$355.5M
- 12-month gross sales (incl. reinvestments): $341.1M
- Sales ÷ redemptions: 0.49×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $47.9M | $46.0M | $1.9M |
| Jun 2026 | $47.6M | $58.7M | −$11.1M |
| May 2026 | $40.1M | $65.0M | −$24.9M |
| Apr 2026 | $28.8M | $46.9M | −$18.1M |
| Mar 2026 | $19.4M | $42.0M | −$22.5M |
| Feb 2026 | $23.1M | $44.3M | −$21.2M |
| Jan 2026 | $25.9M | $55.8M | −$29.9M |
| Dec 2025 | $24.1M | $47.3M | −$23.2M |
| Nov 2025 | $24.1M | $40.1M | −$16.0M |
| Oct 2025 | $21.1M | $107.0M | −$85.9M |
| Sep 2025 | $19.8M | $81.5M | −$61.8M |
| Aug 2025 | $19.0M | $62.0M | −$42.9M |
LADFX Assets Under Management
Net assets of Lord Abbett Developing Growth Fund INC by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $2.22B |
| 2026-04-30 | $2.22B |
| 2026-01-31 | $2.03B |
| 2025-10-31 | $2.08B |
| 2025-07-31 | $1.96B |
| 2025-04-30 | $1.76B |
| 2025-01-31 | $2.38B |
| 2024-10-31 | $2.46B |
| 2024-07-31 | $2.44B |
| 2024-04-30 | $2.39B |
| 2024-01-31 | $2.40B |
| 2023-10-31 | $2.07B |
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.