STAK Inc. (STAK) — Institutional Holders, Q2 2026
8 institutional investment managers reported a STAK position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $740.9K. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
STAK in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- JANE STREET GROUPAdded · +76,816 sh+$292.7K
- XTX Topco LtdNew · +21,355 sh+$81.4K
- Scientech ResearchNew · +16,508 sh+$62.9K
- UBS Group AGAdded · +12,147 sh+$46.3K
- Tower Research Capital (TRC)Added · +2,100 sh+$8.0K
Biggest sellers
- MORGAN STANLEYSold out · -50,000 sh-$190.5K
- WELLS FARGO & COMPANYSold out · -2,500 sh-$9.5K
STAK 13F holders ranked 1–8 of 8
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | JANE STREET GROUP#1 · 131,219 sh | 131,219 | $499.9K | 0.00% | +141.2% |
| 2 | XTX Topco Ltd#2 · 21,355 sh | 21,355 | $81.4K | <0.01% | New |
| 3 | UBS Group AG#3 · 20,236 sh | 20,236 | $77.1K | 0.00% | +150.2% |
| 4 | Scientech Research#4 · 16,508 sh | 16,508 | $62.9K | 0.05% | New |
| 5 | Tower Research Capital (TRC)#5 · 5,000 sh | 5,000 | $19.1K | <0.01% | +72.4% |
| 6 | HRT FINANCIAL#6 · 131,486 sh | 131,486 | $500.00 | 0.00% | New |
| 7 | Caitong International Asset Management , Ltd#7 · 1 sh | 1 | $4.00 | 0.00% | New |
| 8 | ROYAL BANK OF CANADA#8 · 100 sh | 100 | $0.00 | 0.00% | New |
Funds that sold out of STAK in Q2 2026 (2)
Held STAK at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| MORGAN STANLEY50,000 sh | 50,000 | $50.0K |
| WELLS FARGO & COMPANY2,500 sh | 2,500 | $2.5K |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.