AltShares Merger Arbitrage ETF
ARB
32 hedge funds and large institutions have $92.7M invested in AltShares Merger Arbitrage ETF in 2025 Q4 according to their latest regulatory filings, with 4 funds opening new positions, 19 increasing their positions, 8 reducing their positions, and 4 closing their positions.
1,021% more capital inflows, than outflows
Capital inflows: $13.2M | Capital outflows: $1.17M
138% more repeat investments, than reductions
Existing positions increased: 19 | Existing positions reduced: 8
2.44% more ownership
Funds ownership: 91.77% → 94.21% (+2.4%)
0% more funds holding
Funds holding: 32 → 32 (0)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0% more first-time investments, than exits
New positions opened: 4 | Existing positions closed: 4
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AssetMark Inc
Concord,
California
|
+$7.14M |
| 2 |
GTS Securities
Miami,
Florida
|
+$1.27M |
| 3 |
PFG Advisors
Phoenix,
Arizona
|
+$882K |
| 4 |
Sonoma Allocations
Santa Rosa,
California
|
+$726K |
| 5 |
Longview Asset Management (New Mexico)
Santa Fe,
New Mexico
|
+$438K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
World Investment Advisors
Santa Barbara,
California
|
-$324K |
| 2 |
Raymond James Financial
St Petersburg,
Florida
|
-$320K |
| 3 |
Advisors Preferred
Rockville,
Maryland
|
-$259K |
| 4 |
Osaic Holdings
Scottsdale,
Arizona
|
-$115K |
| 5 |
CAPTRUST Financial Advisors
Raleigh,
North Carolina
|
-$67.4K |
ARB Hedge Fund Activity: Q4 2025 in Review
32 of the 8,307 institutional investors tracked by Wall St. Rank reported a position in AltShares Merger Arbitrage ETF (ARB) for Q4 2025, worth a combined $92.7M — up 15% from $80.5M a quarter earlier.
Fund positioning in ARB was balanced in Q4 2025: 4 funds opened new positions, 4 closed out, 19 added to existing stakes and 8 trimmed.
The largest buyer was AssetMark Inc, adding an estimated $7.14M. The largest seller was World Investment Advisors, exiting entirely with an estimated $324K sold.
- 32 institutional investors held AltShares Merger Arbitrage ETF (ARB) as of Q4 2025, unchanged from Q3 2025.
- Funds reported $92.7M of AltShares Merger Arbitrage ETF stock for Q4 2025, up 15% quarter-over-quarter.
- 4 funds opened new AltShares Merger Arbitrage ETF positions in Q4 2025 and 4 closed out, a net change of 0 holders.
- The largest AltShares Merger Arbitrage ETF buyer in Q4 2025 was AssetMark Inc, an estimated $7.14M added.
- The largest AltShares Merger Arbitrage ETF seller in Q4 2025 was World Investment Advisors, an estimated $324K sold.
Based on aggregated 13F filings for Q4 2025.