ARB — AltShares Merger Arbitrage ETF

Data updated: 2026-09-25

ARB — AltShares Merger Arbitrage ETF. 0.82% expense ratio · since 2020 · Event-Driven. Holdings, fees, performance and SEC filings.

ARB Fund Overview

ARB — AltShares Merger Arbitrage ETF is a US ETF managed by Arbitrage Funds, categorised as Event-Driven. Its benchmark is the Water Island Merger Arbitrage USD Hedged Index. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.

  • Type: US ETF
  • Manager: Arbitrage Funds
  • Category: Event-Driven
  • Benchmark: Water Island Merger Arbitrage USD Hedged Index
  • Inception date: May 7, 2020
  • Ticker: ARB
  • SEC CIK: 0001105076
  • SEC series ID: S000108415
  • Share class ID: C000279402
  • FIGI: BBG00S7NVQL5

About ARB

AltShares Merger Arbitrage ETF (ARB) seeks to closely correspond, before fees and expenses, to the performance of the Water Island Merger Arbitrage USD Hedged Index. The Fund pursues a merger arbitrage strategy by holding long positions in target companies of announced acquisitions, and short positions in acquirer stock where deals call for share exchanges, capturing the spread between target trading prices and deal terms. Launched May 7, 2020, ARB costs 0.82% a year.

ARB Costs and Fees

ARB costs about $82 per $10,000 invested per year in fund expenses.

  • Net expense ratio: 0.82%
  • Gross expense ratio: 0.82%
  • Portfolio turnover: 399%

ARB Debt Constituents

No individual debt constituents are reported in AltShares Merger Arbitrage ETF's latest SEC N-PORT filing.

ARB Prospectus and SEC Filings

Official AltShares Merger Arbitrage ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.

Related Funds

Other Event-Driven funds tracked on ABC INVEST:

ARB: Frequently Asked Questions

What is the expense ratio of AltShares Merger Arbitrage ETF (ARB)?

ARB has a net expense ratio of 0.82%, about $82 a year for every $10,000 invested. ARB fees and costs

What is ARB's benchmark?

ARB measures its performance against the Water Island Merger Arbitrage USD Hedged Index.

When did ARB launch?

ARB is a series of Arbitrage Funds. It launched on May 7, 2020.

How does ARB compare with similar Event-Driven funds?

Among 7 Event-Driven funds, ARB has the lowest net expense ratio (0.82%).

Where can I find ARB's prospectus and SEC filings?

ARB's latest prospectus (485BPOS) was filed September 25, 2026. All 1 filings are linked on ABC INVEST and on SEC EDGAR (series S000108415). ARB SEC filings

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, and annual data from Form N-CEN.

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.