BPIRX — Boston Partners Long/Short Research Fund
Data updated: 2026-07-28
BPIRX — Boston Partners Long/Short Research Fund. United States Large Cap Blend / Core Equity · $588.06M AUM. Holdings, fees, performance and SEC filings.
BPIRX Fund Overview
BPIRX — Boston Partners Long/Short Research Fund is a US mutual fund managed by Rbb Fund, Inc., categorised as United States Large Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Rbb Fund, Inc.
- Category: United States Large Cap Blend / Core Equity
- Assets under management: $588.06M
- 1-year return: 13.0%
- Ticker: BPIRX
- SEC CIK: 0000831114
- SEC series ID: S000030191
- Share class ID: C000092913
BPIRX Holdings
Top 10 holdings of Boston Partners Long/Short Research Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Flex Ltd | 1.90% |
| Seagate Technology Holdings PL | 1.47% |
| Frontdoor Inc | 1.40% |
| JPMorgan Chase & Co | 1.27% |
| AbbVie Inc | 1.09% |
| Wells Fargo & Co | 1.09% |
| UnitedHealth Group Inc | 1.03% |
| Broadcom Inc | 1.01% |
| Bank of America Corp | 0.97% |
| Lam Research Corp | 0.96% |
BPIRX Portfolio Allocation
Asset-class allocation of Boston Partners Long/Short Research Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 97.5% |
| Cash & Equivalents | 1.0% |
BPIRX Performance
Total returns for BPIRX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 3.1% |
| 1 year | 13.0% |
| 3 years (annualised) | 14.0% |
| 5 years (annualised) | 10.2% |
BPIRX Risk Information
Risk metrics for BPIRX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 8.9%
BPIRX Costs and Fees
BPIRX costs about $209 per $10,000 invested per year in fund expenses.
- Net expense ratio: 2.09%
- Gross expense ratio: 2.09%
- Portfolio turnover: 65%
- Brokerage commissions: 11.63 bps of average net assets (SEC N-CEN)
BPIRX Cashflows
Over the 12 months to 2026-05, Boston Partners Long/Short Research Fund had net inflows of $55.52M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-05 | $870.52K |
| 2026-04 | −$4.47M |
| 2026-03 | −$4.06M |
| 2026-02 | −$23.84K |
| 2026-01 | $38.16M |
| 2025-12 | $26.05M |
BPIRX Debt Constituents
No individual debt constituents are reported in Boston Partners Long/Short Research Fund's latest SEC N-PORT filing.
BPIRX Prospectus and SEC Filings
Official Boston Partners Long/Short Research Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-07-02
- Prospectus supplement (497) — filed 2026-01-05
- Prospectus supplement (497) — filed 2025-01-06
- Portfolio holdings (N-PORT) — filed 2026-07-28
- Portfolio holdings (N-PORT) — filed 2026-04-28
- Portfolio holdings (N-PORT) — filed 2026-01-28
- Annual census (N-CEN) — filed 2023-11-14
- Annual census (N-CEN) — filed 2022-11-14
Related Funds
Other United States Large Cap Blend / Core Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.