STAK · STAK Inc. · Holdings
Market Cap
$22.48M
Shares
19.21M
Volume · Oct 5
203.2K
Avg daily vol (3M)
4.49M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
Holders: 8
Total Value: $1,241,694
Total Shares: 325,905
Institutional Ownership Trend
6 quarters
Holder Concentration
Across 8 13F filers · Δ vs Mar 31, 2026Top Holder
40.3%
−5.8 pts
Top 5
98.4%
−1.6 pts
Top 10
100.0%
0.0 pts
HHI
3,358
Highly concentrated−628
Quarterly Activity
vs Mar 31, 2026
New
5
Increased
3
Decreased
0
Sold Out
2
Unchanged
0
Holder count:
+3
Institutional value:
+953.2%
Shares held:
+176.4%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega JANE STREET GROUP, LLC | +76,816 | 131,219 | |
| Mega UBS Group AG | +12,147 | 20,236 | |
| Mid Tower Research Capital LLC (TRC) | +2,100 | 5,000 |
Top Sellers
vs Mar 31, 2026No qualifying movers this quarter.
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Large HRT FINANCIAL LP | 131,486 | $500,961 | |
| Mid XTX Topco Ltd | 21,355 | $81,362 | |
| Small Scientech Research LLC | 16,508 | $62,895 | |
| Mega ROYAL BANK OF CANADA | 100 | $381 | |
| Small Caitong International Asset Management Co., Ltd | 1 | $3 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega MORGAN STANLEY | 50,000 | $50,000 | |
| Mega WELLS FARGO & COMPANY/MN | 2,500 | $2,500 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Large HRT FINANCIAL LP | $500,961 | 40.34% | 131,486 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $499,943 | 40.26% | 131,219 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $81,362 | 6.55% | 21,355 | Shares | 2026-08-14 | |
| Mega UBS Group AG | $77,099 | 6.21% | 20,236 | Shares | 2026-08-13 | |
| Small Scientech Research LLC | $62,895 | 5.07% | 16,508 | Shares | 2026-08-14 | |
| Mid Tower Research Capital LLC (TRC) | $19,050 | 1.53% | 5,000 | Shares | 2026-08-11 | |
| Mega ROYAL BANK OF CANADA Bank | $381 | 0.03% | 100 | Shares | 2026-08-14 | |
| Small Caitong International Asset Management Co., Ltd | $3 | 0.00% | 1 | Shares | 2026-08-05 |