J-Star Holding Co
YMAT
3 hedge funds and large institutions have $23.7K invested in J-Star Holding Co in 2025 Q4 according to their latest regulatory filings, with 2 funds opening new positions, increasing their positions, 1 reducing their positions, and 1 closing their positions.
100% more first-time investments, than exits
New positions opened: 2 | Existing positions closed: 1
50% more funds holding
Funds holding: 2 → 3 (+1)
0.04% less ownership
Funds ownership: 0.1% → 0.06% (-0.04%)
76% less capital invested
Capital invested by funds: $101K → $23.7K (-$77.1K)
100% less repeat investments, than reductions
Existing positions increased: 0 | Existing positions reduced: 1
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HF
HRT Financial
New York
|
+$30.9K |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$623 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$82.2K |
| 2 |
TSS
Two Sigma Securities
New York
|
-$1.56K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
HF
1
HRT Financial
New York
| $17K | +$30.9K | +7,129 | New |
|
|
TSS
2
Two Sigma Securities
New York
| $6.35K | -$1.56K | -361 | -12% |
|
|
3
UBS Group
Zurich,
Switzerland
| $335 | +$623 | +144 | New |
|
|
4
Citadel Advisors
Miami,
Florida
| – | -$82.2K | -13,706 | Closed |
|
YMAT Hedge Fund Activity: Q4 2025 in Review
3 of the 8,225 institutional investors tracked by Wall St. Rank reported a position in J-Star Holding Co (YMAT) for Q4 2025, worth a combined $23.7K — down 76% from $101K a quarter earlier.
Buyers outnumbered sellers: 2 funds opened new YMAT positions and 1 closed out — a net gain of 1 holder — while 0 added to existing stakes and 1 trimmed.
The largest buyer was HRT Financial, opening a new position worth an estimated $30.9K. The largest seller was Citadel Advisors, exiting entirely with an estimated $82.2K sold.
- 3 institutional investors held J-Star Holding Co (YMAT) as of Q4 2025, up from 2 in Q3 2025.
- Funds reported $23.7K of J-Star Holding Co stock for Q4 2025, down 76% quarter-over-quarter.
- 2 funds opened new J-Star Holding Co positions in Q4 2025 and 1 closed out, a net change of +1 holder.
- The largest J-Star Holding Co buyer in Q4 2025 was HRT Financial, an estimated $30.9K added.
- The largest J-Star Holding Co seller in Q4 2025 was Citadel Advisors, an estimated $82.2K sold.
Based on aggregated 13F filings for Q4 2025.