Ticker · CUSIP 09073N300

STEX

BIOSIG TECHNOLOGIES INC
···Share
Holders (tracked)
3
Combined shares
439,670
Combined value
$1.33M
Last close
$1.11
Quarter
2025Q4
Price · 1Y$1.11+0.53 (+91.38%)H $11.55 · L $0.53 · Avg Vol 1.3M
Position opened
$0.00$2.00$4.00$6.00$8.00$10.00$12.00VolJul 25Oct 25Jan 26Apr 26
Tracked holders · last 8 quarters
Flat over the last 5 quarters.
312024Q12025Q4
Price is -63.4% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

3 events
  1. Ken Griffin (Citadel Advisors) added2026-02-17
    +8,900 shares · 2025Q4
    Position
  2. Izzy Englander (Millennium Mgmt) added2026-02-17
    +306,196 shares · 2025Q4
    Position
  3. Izzy Englander (Millennium Mgmt) opened position2025-11-14
    +34,274 shares · 2025Q3
    Position

Insider activity

No insider transactions in the last 30 days.
View full insider history for STEX →
Follow-the-investor returns
If you'd copied each holder of STEX…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
Izzy Englander (Millennium Mgmt)2024Q4$2.87-61.4%$378K
Ken Griffin (Citadel Advisors)2025Q3$4.20-73.6%$35K
Ken Griffin (Citadel Advisors)2025Q3$4.20-73.6%$35K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to2
Trimmed0
—
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2024Q1
1
$40K
2024Q4
1
$228K
2025Q1
1
$38K
2025Q3
3
$718K
2025Q4
3
$1.3M

Who owns STEX

3 super-investors · 2025Q4
Tracked stake
439.7K
shares
Combined value
$1M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added3
#ManagerSharesValue
1Izzy Englander
Millennium Mgmt
340.5K$1M
2Ken Griffin
Citadel Advisors
67.8K$205K
3Ken Griffin
Citadel Advisors
31.4K$95K

Recent moves

8 transactions
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