Ticker · CUSIP 09062W204
Holders (tracked)
4
Combined shares
518,177
Combined value
$12.53M
Last close
$21.50
Quarter
2025Q4
Price · 1Y$21.50-0.41 (-1.87%)H $28.79 · L $18.15 · Avg Vol 449K
Tracked holders · last 8 quarters
-4 vs previous quarter over the last 8.
Price is -11.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
14 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−41,171 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−119,162 shares · 2025Q4Position
- Two Sigma Investments exited2026-02-17−15,800 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) exited2026-02-17−27,698 shares · 2025Q4Position
- Steve Cohen (Point72) exited2026-02-17−113,030 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+4,014 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+32,500 shares · 2025Q4Position
- −60,139 shares · 2025Q3Position
- Two Sigma Investments opened position2025-11-14+15,800 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+783 shares · 2025Q3Position
- Steve Cohen (Point72) opened position2025-11-14+113,030 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+1,712 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+169,831 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−113,900 shares · 2025Q3Position
Insider activity
Last 30 days
Net (open-market)
$0
Buys
0 · $0
Sells
0 · $0
Unique insiders
3
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-08 | Mathew Aby J. EVP & Chief Scientific Officer · Officer | F | 515 | $19.27 | $9.9K |
| 04-08 | Berard Todd Chief Marketing Officer · Officer | F | 293 | $19.27 | $5.6K |
| 04-08 | Wichterman Troy Chief Financial Officer · Officer | F | 844 | $19.27 | $16.3K |
Follow-the-investor returns
If you'd copied each holder of BLFS…
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 |
|---|---|---|---|---|
| T. Rowe Price | 2016Q3 | $19.08 | +12.7% | $640K |
| Renaissance Technologies | 2017Q3 | $21.93 | -2.0% | $4.8M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $23.84 | -9.8% | $2.1M |
| D.E. Shaw & Co. | 2020Q3 | $26.32 | -18.3% | $3.6M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to2
- Renaissance Technologies+32,500$786K
- T. Rowe Price+4,014$97
Trimmed2
- D.E. Shaw & Co.−119,162$2.9M
- Ken Griffin (Citadel Advisors)−41,171$996K
Exited3
- Steve Cohen (Point72)−113,030$2.9M
- Izzy Englander (Millennium Mgmt)−27,698$707K
- Two Sigma Investments−15,800$403K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 8 | $117.0M |
| 2022Q2 | 7 | $93.8M |
| 2022Q3 | 6 | $143.3M |
| 2022Q4 | 8 | $113.8M |
| 2023Q1 | 9 | $135.8M |
| 2023Q2 | 7 | $135.4M |
| 2023Q3 | 7 | $117.0M |
| 2023Q4 | 9 | $139.2M |
| 2024Q1 | 9 | $152.3M |
| 2024Q2 | 8 | $143.4M |
| 2024Q3 | 7 | $29.2M |
| 2024Q4 | 7 | $49.7M |
| 2025Q1 | 9 | $20.3M |
| 2025Q2 | 6 | $20.5M |
| 2025Q3 | 8 | $20.7M |
| 2025Q4 | 4 | $12.5M |
Who owns BLFS
4 super-investors · 2025Q4
Tracked stake
518.2K
shares
Combined value
$13M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added2Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 224.7K | $5M |
| 2 | D.E. Shaw & Co. | 166.4K | $4M |
| 3 | Ken Griffin Citadel Advisors | 97.3K | $2M |
| 4 | T. Rowe Price | 29.8K | $721K |
Recent moves
20 transactions
- −27,698 · 2025Q4
- TRIMD.E. Shaw & Co.−119,162 · 2025Q4
- −15,800 · 2025Q4
- −41,171 · 2025Q4
- −113,030 · 2025Q4
- +4,014 · 2025Q4
- +32,500 · 2025Q4
- −60,139 · 2025Q3
- +783 · 2025Q3
- +113,030 · 2025Q3
- +1,712 · 2025Q3
- +15,800 · 2025Q3
- +169,831 · 2025Q3
- −113,900 · 2025Q3
- +115,712 · 2025Q2
- −88,087 · 2025Q2
- −265 · 2025Q2
- −361,589 · 2025Q2
- +3,133 · 2025Q2
- +259,100 · 2025Q2
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