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Stephen A. Sherwin

NBIX
DIRECTOR · NEUROCRINE BIOSCIENCES INC · CIK 0001079462
FILING MIX · LIFETIME45%/55%
BUYS
26
SELLS
32
TOTAL VALUE
$24.64M
COMPANIES
2
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
45,621
AVG SELL PX
$101.38
TRADE KIND
SHOWING 58 / 58
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
10 backtested trades · 8 horizons · 2 pending
Forward-return performance of every backtestable P/S trade by Stephen A. Sherwin, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d10+60.00%-1.61%-1.64%+0.03%-1.54%—
14d10+50.00%-1.09%-0.81%-0.28%+0.85%—
30d10+40.00%+1.13%+1.25%-0.12%+0.47%—
60d10+40.00%+2.19%+2.92%-0.74%+4.01%—
90d10+50.00%+3.40%+7.74%-4.34%-5.81%—
180d10+70.00%-3.86%+13.70%-17.56%-19.87%—
1y10+50.00%+5.80%+23.95%-18.15%-18.08%—
2y10(2 pending)+37.50%+9.24%+49.97%-43.04%-52.12%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
NBIX · 30,428 shares · as of Jun 5, 2026
012,87625,75238,62851,504202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 26 buys / 32 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
1,505——15,193Jun 9, 2026Jun 11, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
10,000——0Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
1,843$167.31$308.4K15,860Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
15,000$53.64$804.6K30,860Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
10,000$79.79$797.9K40,860Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
5,829$166.56$970.9K17,703Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000——0Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
6,896$165.79$1.14M23,532Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
7,883$163.81$1.29M32,977Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
2,549$164.44$419.2K30,428Jun 5, 2026Jun 9, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
2,567——2,567May 27, 2026May 29, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
3,318——15,860May 21, 2026May 21, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
3,318——0May 21, 2026May 21, 2026 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALEGRANT
Gift
1,000——12,542Sep 2, 2025Sep 3, 2025 ↗View →
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
2,370——13,688Jun 17, 2025Jun 18, 2025 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
2,869——13,542May 22, 2025May 22, 2025 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
2,869——0May 22, 2025May 22, 2025 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
3,318——3,318May 21, 2025May 22, 2025 ↗View →
BIIB
BIOGEN INC.
SALE10b5-1
10b5-1 plan
8,760$150.02$1.31M11,318Mar 7, 2025Mar 10, 2025 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
13,831$116.69$1.61M10,673Feb 13, 2025Feb 14, 2025 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALEGRANT
Gift
2,000——24,504Nov 4, 2024Nov 7, 2024 ↗View →
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
1,340——20,078Jun 21, 2024Jun 25, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
25,000$133.46$3.34M26,504May 29, 2024May 30, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
15,000$47.89$718.4K41,504May 29, 2024May 30, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000——0May 29, 2024May 30, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
25,000——0May 29, 2024May 30, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
25,000$42.76$1.07M51,504May 29, 2024May 30, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE10b5-1
10b5-1 plan
15,000$133.47$2.00M26,504May 29, 2024May 30, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
2,869——2,869May 22, 2024May 23, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
4,199——26,504May 17, 2024May 21, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
4,199——0May 17, 2024May 21, 2024 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALEGRANT
Gift
2,750——22,305Nov 16, 2023Nov 20, 2023 ↗View →
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
960——18,738Jun 26, 2023Jun 28, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
4,199——4,199May 17, 2023May 19, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000$118.87$1.78M25,055Jan 3, 2023Jan 5, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000$12.98$194.7K0Jan 3, 2023Jan 5, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000$118.85$1.78M25,055Jan 3, 2023Jan 5, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
15,000$12.98$194.7K40,055Jan 3, 2023Jan 5, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
15,000$12.71$190.7K40,055Jan 3, 2023Jan 5, 2023 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000$12.71$190.7K0Jan 3, 2023Jan 5, 2023 ↗View →
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
1,370——18,473Jun 15, 2022Jun 17, 2022 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
9,724——9,724May 18, 2022May 20, 2022 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000$6.66$99.9K0Jan 24, 2022Jan 26, 2022 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASE
15,000$6.66$99.9K40,055Jan 24, 2022Jan 26, 2022 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
15,000$74.43$1.12M25,055Jan 24, 2022Jan 26, 2022 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALEGRANT
Gift
2,000——25,055Dec 14, 2021Dec 16, 2021 ↗View →
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
775——17,103Jul 1, 2021Jul 2, 2021 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
8,833——8,833May 19, 2021May 20, 2021 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALEGRANT
Gift
2,806——27,055Dec 3, 2020Dec 7, 2020 ↗View →
BIIB
BIOGEN INC.
PURCHASEGRANT
Stock grant
890——16,328Jun 3, 2020Jun 5, 2020 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
6,018——6,018May 19, 2020May 21, 2020 ↗View →
NBIX
NEUROCRINE BIOSCIENCES INC
SALE
17,687$99.39$1.76M29,861Apr 28, 2020Apr 30, 2020 ↗View →
BIIB
BIOGEN INC.
SALE
270$295.29$79.7K15,438Mar 11, 2020Mar 12, 2020 ↗View →
BIIB
BIOGEN INC.
PURCHASE
1,355$58.46$79.2K15,708Mar 11, 2020Mar 12, 2020 ↗View →
BIIB
BIOGEN INC.
SALE
1,355——0Mar 11, 2020Mar 12, 2020 ↗View →
BIIB
BIOGEN INC.
PURCHASE
10,923$58.46$638.6K16,517Mar 11, 2020Mar 12, 2020 ↗View →
BIIB
BIOGEN INC.
SALE
2,164$295.22$638.8K14,353Mar 11, 2020Mar 12, 2020 ↗View →
BIIB
BIOGEN INC.
SALE
10,923——0Mar 11, 2020Mar 12, 2020 ↗View →
Other insiders · NBIX
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About this filer
CIK 0001079462
ROLE
Director
PRIMARY
NBIX
COMPANIES
2
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001079462DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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