BBMIX Performance — BBH Select Series Mid Cap Fund, Class I
Data updated: 2026-01-14
BBMIX returned −5.19% over one year to Oct 2025. The annualised 3-year return is +9.47%. The fund trailed its US Mid-Cap Blend category average: $100 invested three years ago grew to $131, against $141 for the category, and to $95 over one year, against $108. Volatility over the past three years was 16.10% a year. In the 12 months to Oct 2025 the fund took in a net $76.3M, and assets reached $518.15M.
BBMIX Growth of $100
What $100 invested in BBH Select Series Mid Cap Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Blend category average over the same months.
| Period | BBMIX | Category average |
|---|---|---|
| 1 year (Nov 2024 – Oct 2025) | $95 | $108 |
| 3 years (Nov 2022 – Oct 2025) | $131 | $141 |
| Since data start (May 2021 – Oct 2025) | $116 | $128 |
BBMIX Trailing Returns
Total returns to Oct 2025, from SEC N-PORT.
| Period | Total return |
|---|---|
| 1 year | −5.19% |
| 3 years (annualised) | +9.47% |
BBMIX Annual Returns
Calendar-year total returns of BBH Select Series Mid Cap Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2025 (Jan–Oct) | −3.18% |
| 2024 | +11.42% |
| 2023 | +26.02% |
| 2022 | −24.76% |
| 2021 (May–Dec) | +13.49% |
BBMIX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | +5.3% | −4.9% | −6.1% | −1.8% | +2.5% | +4.7% | +0.9% | −0.9% | −0.9% | −1.4% | — | — |
| 2024 | −1.7% | +5.6% | +2.3% | −5.3% | +2.2% | +1.7% | +5.0% | +1.2% | +1.8% | +0.7% | +6.0% | −7.6% |
| 2023 | +10.4% | −0.9% | −1.8% | −0.7% | +1.9% | +7.5% | +2.2% | −1.9% | −5.1% | −5.8% | +10.6% | +8.7% |
| 2022 | −9.4% | −1.4% | +1.3% | −9.3% | −1.5% | −8.3% | +11.7% | −4.2% | −6.3% | +5.0% | +1.7% | −5.1% |
| 2021 | — | — | — | — | +0.3% | +2.0% | +2.1% | +0.5% | −3.9% | +5.9% | −0.1% | +6.4% |
BBMIX Risk
Risk measures from monthly returns over Nov 2022 – Oct 2025.
- 3-year volatility (annualised): 16.10%
- 3-year Sharpe ratio: 0.31 (vs 4.5% risk-free rate)
- Best month: +10.61% (Nov 2023)
- Worst month: −7.59% (Dec 2024)
BBMIX Fund Flows
Monthly money in and out of BBH Select Series Mid Cap Fund, from SEC Form N-PORT.
- 12-month net flow: $76.3M
- 12-month gross sales (incl. reinvestments): $159.5M
- Sales ÷ redemptions: 1.92×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Oct 2025 | $3.7M | $4.5M | −$762K |
| Sep 2025 | $7.7M | $6.2M | $1.5M |
| Aug 2025 | $8.5M | $6.9M | $1.7M |
| Jul 2025 | $10.3M | $5.5M | $4.9M |
| Jun 2025 | $10.2M | $5.5M | $4.7M |
| May 2025 | $9.6M | $9.2M | $431K |
| Apr 2025 | $11.7M | $25.8M | −$14.1M |
| Mar 2025 | $15.5M | $3.9M | $11.6M |
| Feb 2025 | $28.3M | $4.4M | $23.9M |
| Jan 2025 | $17.8M | $4.6M | $13.3M |
| Dec 2024 | $18.9M | $4.7M | $14.3M |
| Nov 2024 | $17.2M | $2.2M | $14.9M |
BBMIX Assets Under Management
Net assets of BBH Select Series Mid Cap Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2025-10-31 | $518.15M |
| 2025-07-31 | $532.00M |
| 2025-04-30 | $482.04M |
| 2025-01-31 | $529.28M |
| 2024-10-31 | $473.09M |
| 2024-07-31 | $348.79M |
| 2024-04-30 | $274.23M |
| 2024-01-31 | $214.94M |
| 2023-10-31 | $140.12M |
| 2023-07-31 | $113.44M |
| 2023-04-30 | $54.72M |
| 2023-01-31 | $13.08M |
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.