Ticker · CUSIP 34960Q307
Holders (tracked)
4
Combined shares
334,251
Combined value
$1.22M
Last close
$2.36
Quarter
2025Q4
Price · 1Y$2.36+0.83 (+54.25%)H $4.38 · L $1.50 · Avg Vol 657K
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is -35.5% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
5 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−51,500 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+54,170 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+40,300 shares · 2025Q4Position
- Two Sigma Investments added2025-11-14+39,149 shares · 2025Q3Position
- Renaissance Technologies opened position2025-11-13+40,800 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of FBIO…
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) | 2023Q4 | $2.48 | -5.0% | $144K |
| Ken Griffin (Citadel Advisors) | 2023Q4 | $2.48 | -5.0% | $144K |
| Renaissance Technologies | 2023Q4 | $3.01 | -21.5% | $191K |
| Two Sigma Investments | 2024Q4 | $3.13 | -24.6% | $328K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to2
- Two Sigma Investments+54,170$198K
- Renaissance Technologies+40,300$147K
Trimmed1
- Ken Griffin (Citadel Advisors)−51,500$188K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2023Q4 | 4 | $354K |
| 2024Q1 | 3 | $170K |
| 2024Q2 | 5 | $332K |
| 2024Q3 | 5 | $205K |
| 2024Q4 | 5 | $1.0M |
| 2025Q1 | 4 | $244K |
| 2025Q2 | 2 | $316K |
| 2025Q3 | 3 | $1.1M |
| 2025Q4 | 4 | $1.2M |
Who owns FBIO
4 super-investors · 2025Q4
Tracked stake
334.3K
shares
Combined value
$1M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added2Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Two Sigma Investments | 139.2K | $509K |
| 2 | Renaissance Technologies | 81.1K | $297K |
| 3 | Ken Griffin Citadel Advisors | 60.9K | $223K |
| 4 | Ken Griffin Citadel Advisors | 53.1K | $194K |
Recent moves
19 transactions
- −51,500 · 2025Q4
- +54,170 · 2025Q4
- +40,300 · 2025Q4
- +39,149 · 2025Q3
- +40,800 · 2025Q3
- +1,033 · 2025Q2
- −32,000 · 2025Q2
- −9,255 · 2025Q1
- −143,800 · 2025Q1
- +54,054 · 2024Q4
- −17,151 · 2024Q4
- +97,712 · 2024Q4
- −48,025 · 2024Q3
- +78,088 · 2024Q3
- +65,176 · 2024Q2
- ADDBlackRock+35,018 · 2024Q2
- −25,867 · 2024Q1
- +25,867 · 2023Q4
- NEWBlackRock+74,939 · 2023Q4
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