Roundhill Space & Technology ETF
MARS
18 hedge funds and large institutions have $17.7M invested in Roundhill Space & Technology ETF in 2026 Q2 according to their latest regulatory filings, with 16 funds opening new positions, 2 increasing their positions, reducing their positions, and 2 closing their positions.
700% more first-time investments, than exits
New positions opened: 16 | Existing positions closed: 2
432% more capital invested
Capital invested by funds: $3.32M → $17.7M (+$14.4M)
350% more funds holding
Funds holding: 4 → 18 (+14)
30% more call options, than puts
Call options by funds: $475K | Put options by funds: $365K
30.66% less ownership
Funds ownership: 51.96% → 21.29% (-31%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$8.25M |
| 2 |
OMC
Old Mission Capital
Chicago,
Illinois
|
+$3.81M |
| 3 |
Jane Street
New York
|
+$2.06M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$858K |
| 5 |
MOS
MGO One Seven
Beachwood,
Ohio
|
+$769K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GS
GTS Securities
Miami,
Florida
|
-$2.38M |
| 2 |
BWL
Bogart Wealth LLC
Mclean,
Virginia
|
-$5.12K |
MARS Hedge Fund Activity: Q2 2026 in Review
18 of the 8,318 institutional investors tracked by Wall St. Rank reported a position in Roundhill Space & Technology ETF (MARS) for Q2 2026, worth a combined $17.7M — up 432% from $3.32M a quarter earlier.
Buyers outnumbered sellers: 16 funds opened new MARS positions and 2 closed out — a net gain of 14 holders — while 2 added to existing stakes and 0 trimmed.
The largest buyer was Susquehanna International Group, opening a new position worth an estimated $8.25M. The largest seller was GTS Securities, exiting entirely with an estimated $2.38M sold.
- 18 institutional investors held Roundhill Space & Technology ETF (MARS) as of Q2 2026, up from 4 in Q1 2026.
- Funds reported $17.7M of Roundhill Space & Technology ETF stock for Q2 2026, up 432% quarter-over-quarter.
- 16 funds opened new Roundhill Space & Technology ETF positions in Q2 2026 and 2 closed out, a net change of +14 holders.
- The largest Roundhill Space & Technology ETF buyer in Q2 2026 was Susquehanna International Group, an estimated $8.25M added.
- The largest Roundhill Space & Technology ETF seller in Q2 2026 was GTS Securities, an estimated $2.38M sold.
Based on aggregated 13F filings for Q2 2026.