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Richard Aranda

GOSS
CHIEF MEDICAL OFFICER · GOSSAMER BIO, INC. · CIK 0001867872
FILING MIX · LIFETIME53%/47%
BUYS
28
SELLS
25
TOTAL VALUE
$168.0K
COMPANIES
1
ACTIVE SINCE
Jun 2021
HOLDINGS NOW
9,167
AVG SELL PX
$5.51
TRADE KIND
SHOWING 53 / 53
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
8 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Richard Aranda, 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
7d8+50.00%+0.86%+1.07%-0.21%-0.56%—
14d8+37.50%+5.70%+2.30%+3.40%-0.31%—
30d8+50.00%+2.12%+2.63%-0.51%-4.29%—
60d8+62.50%-6.83%+2.48%-9.31%-3.34%—
90d8+62.50%-12.72%+1.98%-14.69%-16.38%—
180d8+75.00%-25.62%+5.49%-31.11%-34.19%—
1y8+62.50%-26.79%+11.39%-38.18%-42.95%—
2y8+75.00%-58.24%+34.22%-92.46%-101.64%—
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
GOSS · 9,167 shares · as of Mar 19, 2026
0143,000286,000429,000572,00020222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 28 buys / 25 sellsCOVERAGE · 20 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
562,500——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
162,500——162,500Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
30,000——30,000Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
40,000——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
572,000——572,000Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
40,000——40,000Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
487,500——487,500Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
20,000——20,000Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
572,000——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
20,000——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
562,500——562,500Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
30,000——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
162,500——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
487,500——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
126,667——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
22,784——22,784Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
157,500——157,500Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
9,167——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
157,500——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
22,784——0Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
126,667——126,667Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
9,167——9,167Mar 19, 2026Mar 20, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
562,500——562,500Jan 2, 2026Jan 5, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
93,750——463,106Jan 2, 2026Jan 5, 2026 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
162,500——369,356Oct 1, 2025Oct 2, 2025 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
572,000——572,000Mar 4, 2025Mar 6, 2025 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
1,908$0.66$1.3K196,891Jun 24, 2024Jun 25, 2024 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
4,018$1.33$5.3K198,799Mar 18, 2024Mar 19, 2024 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
487,500——487,500Jan 2, 2024Jan 4, 2024 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
162,500——162,500Nov 20, 2023Nov 22, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
1,814$1.29$2.3K197,574Jun 22, 2023Jun 26, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
190,000——0May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
126,667——126,667May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
45,000——0May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
22,784——22,784May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
40,000——40,000May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
34,175——0May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
13,750——0May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
30,000——0May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
9,167——9,167May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
30,000——30,000May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
60,000——0May 5, 2023May 9, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
157,500——157,500Mar 20, 2023Mar 22, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
7,563$1.10$8.3K199,388Mar 16, 2023Mar 16, 2023 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
157,500——157,500Dec 7, 2022Dec 9, 2022 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
4,757$12.07$57.4K205,430Oct 24, 2022Oct 25, 2022 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
1,778$6.88$12.2K209,897Jun 22, 2022Jun 23, 2022 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
6,278$8.28$52.0K211,675Mar 16, 2022Mar 17, 2022 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
190,000——190,000Jan 6, 2022Jan 10, 2022 ↗View →
GOSS
GOSSAMER BIO, INC.
SALE
Chief Medical Officer
2,377$12.25$29.1K217,432Oct 25, 2021Oct 26, 2021 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
15,000——219,809Jun 21, 2021Jun 22, 2021 ↗View →
GOSS
GOSSAMER BIO, INC.
PURCHASEGRANT
Stock grant
30,000——30,000Jun 21, 2021Jun 22, 2021 ↗View →
Other insiders · GOSS
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About this filer
CIK 0001867872
ROLE
Chief Medical Officer
PRIMARY
GOSS
COMPANIES
1
ACTIVE SINCE
Jun 2021
MARKETPEEL · /INSIDER/0001867872DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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