Roundhill Weekly T-Bill ETF
WEEK
3 hedge funds and large institutions have $87.7M invested in Roundhill Weekly T-Bill ETF in 2026 Q1 according to their latest regulatory filings, with funds opening new positions, 2 increasing their positions, 0 reducing their positions, and 3 closing their positions.
2% less capital invested
Capital invested by funds: $89.3M → $87.7M (-$1.57M)
5.08% less ownership
Funds ownership: 62.39% → 57.31% (-5.1%)
50% less funds holding
Funds holding: 6 → 3 (-3)
100% less first-time investments, than exits
New positions opened: 0 | Existing positions closed: 3
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$252K |
| 2 |
Jane Street
New York
|
+$196K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
OCM
One Capital Management
Westlake Village,
California
|
-$1.08M |
| 2 |
GS
GTS Securities
New York
|
-$646K |
| 3 |
OMC
Old Mission Capital
Chicago,
Illinois
|
-$255K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
ETC
1
Exchange Traded Concepts
Oklahoma City,
Oklahoma
| $86.3M | – | – | – |
|
|
2
Jane Street
New York
| $883K | +$196K | +1,956 | +28% |
|
|
3
Citadel Advisors
Miami,
Florida
| $525K | +$252K | +2,518 | +92% |
|
|
OCM
4
One Capital Management
Westlake Village,
California
| – | -$1.08M | -10,793 | Closed |
|
|
GS
5
GTS Securities
New York
| – | -$646K | -6,460 | Closed |
|
|
OMC
6
Old Mission Capital
Chicago,
Illinois
| – | -$255K | -2,548 | Closed |
|
WEEK Hedge Fund Activity: Q1 2026 in Review
3 of the 8,127 institutional investors tracked by Wall St. Rank reported a position in Roundhill Weekly T-Bill ETF (WEEK) for Q1 2026, worth a combined $87.7M — down 1.8% from $89.3M a quarter earlier.
Sellers outnumbered buyers: 3 funds closed out of WEEK and 0 opened new positions — a net loss of 3 holders — while 0 trimmed existing stakes and 2 added.
The largest buyer was Citadel Advisors, adding an estimated $252K. The largest seller was One Capital Management, exiting entirely with an estimated $1.08M sold.
- 3 institutional investors held Roundhill Weekly T-Bill ETF (WEEK) as of Q1 2026, down from 6 in Q4 2025.
- Funds reported $87.7M of Roundhill Weekly T-Bill ETF stock for Q1 2026, down 1.8% quarter-over-quarter.
- 0 funds opened new Roundhill Weekly T-Bill ETF positions in Q1 2026 and 3 closed out, a net change of -3 holders.
- The largest Roundhill Weekly T-Bill ETF buyer in Q1 2026 was Citadel Advisors, an estimated $252K added.
- The largest Roundhill Weekly T-Bill ETF seller in Q1 2026 was One Capital Management, an estimated $1.08M sold.
Based on aggregated 13F filings for Q1 2026.