InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (1 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
1
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Browse the detailed record of transactions filed by Turner William D., Chief Operating Officer. Director active across 2 companies, notably Sierra Oncology, Inc.. In total, 11 filings have been recorded. Split: 0 buy · 1 sell. Total volume traded: €78k. History available since 26 January 2022. The latest transaction was disclosed on 23 February 2026 (Cession). Regulator: SEC (Form 4). The full history is accessible without signup.
Companies and markets linked to Turner William D.
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations11 total
2,187 shares@ US$41.983916.3% of flowClass A Common StockSEC:0001819688-26-000005:0
25,000 shares0Class A Common StockSEC:0001819688-26-000002:0
10,000 shares@ US$15.5333.1% of flowClass A Common StockSEC:0001193125-25-322691:0
10,000 shares@ US$15.5350.0% of flowClass A Common StockSEC:0001193125-25-314156:0
10,000 shares@ US$15.53100.0% of flowClass A Common StockSEC:0001193125-25-308074:0
22,500 shares0Class A Common StockSEC:0001415889-25-004849:0
100 shares@ US$12.050.3% of flowCommon StockSEC:0001209191-22-023656:0
100 shares@ US$12.050.3% of flowCommon StockSEC:0001209191-22-020521:0
3,453 shares@ US$12.0510.6% of flowCommon StockSEC:0001209191-22-019748:0
10,000 shares@ US$12.0529.5% of flowCommon StockSEC:0001209191-22-007719:0
5,000 shares@ US$12.0514.9% of flowCommon StockSEC:0001209191-22-005426:0
11 of 11 declarations
About Turner William D.
William D. Turner is the Chief Reg & Tech Ops Officer at Sierra Oncology, Inc. He oversees the company's regulatory and technical operations, ensuring compliance and efficiency. His role is essential for the company's success.
