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Roundhill COST WeeklyPay ETF
COSW

5 hedge funds and large institutions have $9.13M invested in Roundhill COST WeeklyPay ETF in 2026 Q1 according to their latest regulatory filings, with 2 funds opening new positions, 1 increasing their positions, 2 reducing their positions, and 2 closing their positions.

New
Increased
Maintained
Reduced
Closed

0% more funds holding

Funds holding: 5 → 5 (0)

0% more first-time investments, than exits

New positions opened: 2 | Existing positions closed: 2

50% less repeat investments, than reductions

Existing positions increased: 1 | Existing positions reduced: 2

84.84% less ownership

Funds ownership: 148.61% → 63.76% (-85%)

93% less capital inflows, than outflows

Capital inflows: $934K | Capital outflows: $13.3M

Holders
5
Holders Change
–
Holders Change %
0%
% of All Funds
0.06%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
2
Increased
1
Reduced
2
Closed
2
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Old Mission Capital
Old Mission Capital
Illinois
+$583K
2
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$248K
3
GTS Securities
GTS Securities
Florida
+$103K

Top Sellers

Rank Fund Capital Flow
1
Exchange Traded Concepts
Exchange Traded Concepts
Oklahoma
-$12.6M
2
Jane Street
Jane Street
New York
-$606K
3
UBS Group
UBS Group
Switzerland
-$26.1K
4
Simplex Trading
Simplex Trading
Illinois
-$142

COSW Hedge Fund Activity: Q1 2026 in Review

5 of the 8,217 institutional investors tracked by Wall St. Rank reported a position in Roundhill COST WeeklyPay ETF (COSW) for Q1 2026, worth a combined $9.13M — down 53% from $19.6M a quarter earlier.

Fund positioning in COSW was balanced in Q1 2026: 2 funds opened new positions, 2 closed out, 1 added to existing stakes and 2 trimmed.

The largest buyer was Old Mission Capital, opening a new position worth an estimated $583K. The largest seller was Exchange Traded Concepts, cutting an estimated $12.6M.

  • 5 institutional investors held Roundhill COST WeeklyPay ETF (COSW) as of Q1 2026, unchanged from Q4 2025.
  • Funds reported $9.13M of Roundhill COST WeeklyPay ETF stock for Q1 2026, down 53% quarter-over-quarter.
  • 2 funds opened new Roundhill COST WeeklyPay ETF positions in Q1 2026 and 2 closed out, a net change of 0 holders.
  • The largest Roundhill COST WeeklyPay ETF buyer in Q1 2026 was Old Mission Capital, an estimated $583K added.
  • The largest Roundhill COST WeeklyPay ETF seller in Q1 2026 was Exchange Traded Concepts, an estimated $12.6M sold.

Based on aggregated 13F filings for Q1 2026.