Sumner Burstein
Insider
First SEC filing: July 16, 2015 · Latest: July 16, 2015
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 16, 2015 | CRBP | G | 375 | · | · | 3,594,471 Direct | -0.01% | Disposed | (price as of 2026-10-02) |
| Aug. 19, 2015 | CRBP | S 10b5-1 | 200,000 | $3.04 | $608,000 | 3,594,846 Direct | -5.27% | Disposed | -93.3% (price as of 2026-10-02) |
| July 15, 2015 | CRBP | S | 30,000 | $2.82 | $84,600 | 3,794,846 Direct | -0.78% | Disposed | -92.8% (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 100 Indirect | · | Acquired | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,824,846 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,824,946 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,825,046 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,825,146 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,825,246 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,825,346 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
| Dec. 17, 2014 | CRBP | G | 100 | · | · | 3,825,446 Direct | 0.00% | Disposed | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 16, 2015 | CRBP | Common Stock | 3,825,546 | Direct |