Ticker · CUSIP 396879108
Holders (tracked)
1
Combined shares
11,830
Combined value
$248.5K
Last close
$27.74
Quarter
2025Q4
Price · 1Y$27.74+18.79 (+209.94%)H $33.56 · L $7.85 · Avg Vol 196K
Position opened
Tracked holders · last 8 quarters
-2 vs previous quarter over the last 8.
Price is +32.0% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
5 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−9,112 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) exited2026-02-17−15,498 shares · 2025Q4Position
- Renaissance Technologies exited2026-02-12−38,400 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−18,683 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+11,100 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of GLSI…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2022Q2 | $9.15 | +203.0% | $328K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to0
—
Trimmed1
- Ken Griffin (Citadel Advisors)−9,112$191K
Exited2
- Renaissance Technologies−38,400$382K
- Izzy Englander (Millennium Mgmt)−15,498$154K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 1 | $4.6M |
| 2022Q2 | 6 | $2.6M |
| 2022Q3 | 3 | $1.5M |
| 2022Q4 | 3 | $1.8M |
| 2023Q1 | 4 | $2.6M |
| 2023Q2 | 3 | $1.7M |
| 2023Q3 | 3 | $1.1M |
| 2023Q4 | 3 | $1.1M |
| 2024Q1 | 3 | $3.1M |
| 2024Q2 | 2 | $6.0M |
| 2024Q3 | 2 | $620K |
| 2024Q4 | 1 | $255K |
| 2025Q1 | 2 | $246K |
| 2025Q2 | 3 | $683K |
| 2025Q3 | 3 | $745K |
| 2025Q4 | 1 | $249K |
Who owns GLSI
1 super-investors · 2025Q4
Tracked stake
11.8K
shares
Combined value
$249K
% of shares outstanding
—
shares-out unknown
Quarter action mix
Trim1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 11.8K | $249K |
Recent moves
20 transactions
- −9,112 · 2025Q4
- −15,498 · 2025Q4
- −38,400 · 2025Q4
- −18,683 · 2025Q3
- +11,100 · 2025Q3
- +34,181 · 2025Q2
- +14,800 · 2025Q2
- −10,200 · 2025Q1
- −10,638 · 2024Q4
- −9,800 · 2024Q4
- +10,638 · 2024Q3
- −4,400 · 2024Q3
- −63,811 · 2024Q2
- ADDBlackRock+252,450 · 2024Q2
- −600 · 2024Q2
- +52,300 · 2024Q1
- +900 · 2024Q1
- TRIMBlackRock−689 · 2024Q1
- −7,644 · 2023Q4
- −17,698 · 2023Q4
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