MarketPeel
Insider Trading Intelligence
DS

Douglas J. Swirsky

CLRB
DIRECTOR · CELLECTAR BIOSCIENCES, INC. · CIK 0001375884
FILING MIX · LIFETIME87%/13%
BUYS
13
SELLS
2
TOTAL VALUE
$120.8K
COMPANIES
2
ACTIVE SINCE
Jun 2020
HOLDINGS NOW
241,669
AVG SELL PX
$1.78
TRADE KIND
SHOWING 15 / 15
Trades · vs SPY
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Performance · forward returns vs SPY
3 backtested trades · 8 horizons · 4 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Douglas J. Swirsky, 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
7d3+66.67%-6.00%-0.60%-5.40%-5.62%
14d3+66.67%-11.62%-1.60%-10.02%-9.08%
30d3+33.33%-9.57%-0.45%-9.12%-12.29%
60d3+33.33%-5.71%+7.48%-13.19%-22.28%
90d3+33.33%-7.47%+7.90%-15.38%-36.14%
180d3(1 pending)+50.00%-54.42%+6.34%-60.75%-60.75%
1y3(1 pending)+50.00%-66.57%+4.18%-70.75%-70.75%
2y3(2 pending)+0.00%-80.48%+4.52%-85.00%-85.00%
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
CLRB · 90,000 shares · as of Feb 14, 2025
029,25058,50087,750117,00020212022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 13 buys / 2 sellsCOVERAGE · 24 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MXCT
MAXCYTE, INC.
SALE
CHIEF FINANCIAL OFFICER
10,142$0.82$8.3K151,669Mar 17, 2026Mar 19, 2026View →
MXCT
MAXCYTE, INC.
PURCHASE
CHIEF FINANCIAL OFFICER
50,000$1.29$64.5K161,811Aug 13, 2025Aug 13, 2025View →
MXCT
MAXCYTE, INC.
SALE
CHIEF FINANCIAL OFFICER
6,939$3.18$22.1K111,811Mar 18, 2025Mar 20, 2025View →
MXCT
MAXCYTE, INC.
PURCHASEGRANT
Stock grant
37,500118,750Mar 14, 2025Mar 18, 2025View →
MXCT
MAXCYTE, INC.
PURCHASEGRANT
Stock grant
150,000150,000Mar 14, 2025Mar 18, 2025View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
90,00090,000Feb 14, 2025Feb 18, 2025View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
90,00090,000Jun 14, 2024Jun 18, 2024View →
MXCT
MAXCYTE, INC.
PURCHASEGRANT
Stock grant
225,000225,000Mar 15, 2024Mar 19, 2024View →
MXCT
MAXCYTE, INC.
PURCHASEGRANT
Stock grant
81,25081,250Mar 15, 2024Mar 19, 2024View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
37,50071,925Jun 28, 2023Jun 28, 2023View →
MXCT
MAXCYTE, INC.
PURCHASEGRANT
Stock grant
350,000350,000Mar 27, 2023Mar 28, 2023View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
11,70011,700Jun 24, 2022Aug 1, 2022View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASE
25,000$1.04$26.0K25,000Sep 14, 2021Sep 14, 2021View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
117,000117,000Jun 30, 2021Jul 2, 2021View →
CLRB
CELLECTAR BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
80,00080,000Jun 24, 2020Jun 25, 2020View →
Other insiders · CLRB
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About this filer
CIK 0001375884
ROLE
Director
PRIMARY
CLRB
COMPANIES
2
ACTIVE SINCE
Jun 2020
MARKETPEEL · /INSIDER/0001375884DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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