DeGolyer Donald W

Insider profile

Performance

Overall performance
3.2
Performance over holding periods
3.2
30 days 90 days 120 days
Average return 17% 8.2% 15.1%
Success rate 100% 68% 82%
Transactions
2 0% Buy
34 71% Buy
47 69% Buy
Ranking by holding-period performance
DeGolyer Donald W's trades of Emergent BioSolutions Inc.'s stock


• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Transaction date
Proposed sale
Price
166.72
Quantity 25,120
Value US$994,117
Transaction date
Proposed sale
Price
8.40
Quantity 15,481
Value US$130,064
Transaction date
Proposed sale
Price
10.54
Quantity 17,801
Value US$187,544
Transaction date
Proposed sale
Price
8.65
Quantity 7,844
Value US$67,831
Transaction date
Proposed sale
Price
11.77
Quantity 25,000
Value US$294,250
Notification date Transaction date Company B/S Transaction type Nb. shares
Price
Value 		Number of shares Price Value Details
2026-10-07 2026-10-07
PrS Proposed sale
25,120
166.72
US$994,117 		25,120 166.72 US$994,117
2026-10-07 2026-10-07
PlS Planned sale
89,968 -32.4%
291.03
US$2,227,240 		89,968 -32.4% 291.03 US$2,227,240
2026-05-04 2026-05-01
PlS Planned sale
72,045 +10.2%
102.12
US$4,981,148 		72,045 +10.2% 102.12 US$4,981,148
2026-05-04 2026-05-01
PlS Planned sale
14,527 -10.0%
8.36
US$121,446 		14,527 -10.0% 8.36 US$121,446
2026-05-01 2026-05-01
PrS Proposed sale
15,481
8.40
US$130,064 		15,481 8.40 US$130,064
2025-11-12 2025-11-10
PlS Planned sale
17,801 -12.9%
10.54
US$187,623 		17,801 -12.9% 10.54 US$187,623
2025-11-10 2025-11-10
PrS Proposed sale
17,801
10.54
US$187,544 		17,801 10.54 US$187,544
2025-08-13 2025-08-12
S Sale
7,844 -5.4%
8.65
US$67,831 		7,844 -5.4% 8.65 US$67,831
2025-08-12 2025-08-12
PrS Proposed sale
7,844
8.65
US$67,831 		7,844 8.65 US$67,831
2024-11-14 2024-11-12
S Sale
25,000 -18.4%
10.91
US$272,750 		25,000 -18.4% 10.91 US$272,750
2024-11-12 2024-11-12
PrS Proposed sale
25,000
11.77
US$294,250 		25,000 11.77 US$294,250