THORATEC CORP's ticker is and the CUSIP is 885175907. A total of 4 filers reported holding THORATEC CORP in Q4 2013. The put-call ratio across all filers is - and the average weighting 0.6%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2015 | $3,353,000 | +315.5% | 53,000 | +192.8% | 0.05% | +318.2% |
| Q2 2015 | $807,000 | -57.1% | 18,100 | -59.7% | 0.01% | -63.3% |
| Q1 2015 | $1,881,000 | +12.5% | 44,900 | -12.8% | 0.03% | +20.0% |
| Q4 2014 | $1,672,000 | -0.4% | 51,500 | -18.0% | 0.02% | -3.8% |
| Q3 2014 | $1,679,000 | -20.8% | 62,800 | +3.3% | 0.03% | -21.2% |
| Q2 2014 | $2,119,000 | +5333.3% | 60,800 | +5427.3% | 0.03% | +3200.0% |
| Q1 2014 | $39,000 | -86.7% | 1,100 | -86.2% | 0.00% | -75.0% |
| Q4 2013 | $293,000 | -55.3% | 8,000 | -54.5% | 0.00% | -69.2% |
| Q3 2013 | $656,000 | +30.9% | 17,600 | +10.0% | 0.01% | +8.3% |
| Q2 2013 | $501,000 | – | 16,000 | – | 0.01% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| GROUP ONE TRADING, L.P. | 53,000 | $3,353,000 | 0.05% |
| SIMPLEX TRADING, LLC | 396 | $214,000 | 0.02% |
| Citadel Advisors | 19,200 | $1,215,000 | 0.00% |