Ticker · CUSIP 86384P109
Holders (tracked)
14
Combined shares
10,657,076
Combined value
$113.02M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 2.
SEC event timeline
18 events
- Fitzgerald Scott Michael · Principal Accounting Officer2026-04-13Sold $10.5K @ $6.50Insider sell
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−945,203 shares · 2025Q413F
- Stanley Druckenmiller (Duquesne) trimmed2026-02-17−1,953,765 shares · 2025Q413F
- Andreas Halvorsen (Viking Global) exited2026-02-17−2,040,816 shares · 2025Q413F
- Two Sigma Investments exited2026-02-17−10,500 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+50,146 shares · 2025Q413F
- +21,051 shares · 2025Q413F
- −41,117 shares · 2025Q413F
- George Soros (Soros Fund Mgmt) trimmed2026-02-13−387,816 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+1,750,000 shares · 2025Q413F
- +578,294 shares · 2025Q313F
- Two Sigma Investments opened position2025-11-14+10,500 shares · 2025Q313F
- +2,040,816 shares · 2025Q313F
- +4,259,516 shares · 2025Q313F
- +874,415 shares · 2025Q313F
- +931,473 shares · 2025Q313F
- +2,994,330 shares · 2025Q313F
- Mario Gabelli (GAMCO) opened position2025-11-12+268,305 shares · 2025Q313F
Insider activity
Last 30 days
Net (open-market)
−$10.5K
Buys
0 · $0
Sells
1 · $10.5K
Unique insiders
1
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-13 | Fitzgerald Scott Michael Principal Accounting Officer · Insider | S | 1,619 | $6.50 | $10.5K |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Norges Bank (Norway SWF)+1,750,000$23.7M
- Paul Tudor Jones (Tudor Investment)+21,051$285K
Added to1
- Izzy Englander (Millennium Mgmt)+50,146$678K
Trimmed4
- Ken Griffin (Citadel Advisors)−945,203$12.8M
- George Soros (Soros Fund Mgmt)−387,816$5.2M
- Ron Baron (Baron Capital / BAMCO)−41,117$556K
- Stanley Druckenmiller (Duquesne)−1,953,765$26K
Exited2
- Andreas Halvorsen (Viking Global)−2,040,816$34.4M
- Two Sigma Investments−10,500$177K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2025Q3 | 12 | $161.6M |
| 2025Q4 | 14 | $113.0M |
Who owns STUB
14 super-investors · 2025Q4
Tracked stake
10.66M
shares
Combined value
$113M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New4Added2Trim6Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ron Baron Baron Capital / BAMCO | 2.95M | $40M |
| 2 | Norges Bank Norway SWF | 1.75M | $24M |
| 3 | Lee Ainslie Maverick Capital | 931.5K | $13M |
| 4 | Izzy Englander Millennium Mgmt | 628.4K | $9M |
| 5 | Ken Griffin Citadel Advisors | 581.7K | $8M |
| 6 | George Soros Soros Fund Mgmt | 486.6K | $7M |
| 7 | Ken Griffin Citadel Advisors | 378.1K | $5M |
| 8 | Ken Griffin Citadel Advisors | 283.3K | $4M |
| 9 | Mario Gabelli GAMCO | 268.3K | $4M |
| 10 | Izzy Englander Millennium Mgmt | 37.0K | $501K |
| 11 | Paul Tudor Jones Tudor Investment | 22.1K | $299K |
| 12 | Paul Tudor Jones Tudor Investment | 21.1K | $285K |
| 13 | Paul Tudor Jones Tudor Investment | 10.0K | $135K |
| 14 | Stanley Druckenmiller Duquesne | 2.31M | $31K |
Recent moves
17 transactions
- −945,203 · 2025Q4
- −1,953,765 · 2025Q4
- −2,040,816 · 2025Q4
- −10,500 · 2025Q4
- +50,146 · 2025Q4
- +21,051 · 2025Q4
- −41,117 · 2025Q4
- −387,816 · 2025Q4
- +1,750,000 · 2025Q4
- +578,294 · 2025Q3
- +10,500 · 2025Q3
- +2,040,816 · 2025Q3
- +4,259,516 · 2025Q3
- +874,415 · 2025Q3
- +931,473 · 2025Q3
- +2,994,330 · 2025Q3
- +268,305 · 2025Q3
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