MarketPeel
Insider Trading Intelligence
DC

David J. Chang

CABA
CHIEF MEDICAL OFFICER · CABALETTA BIO, INC. · CIK 0001790552
FILING MIX · LIFETIME68%/32%
BUYS
15
SELLS
7
TOTAL VALUE
$19.9K
COMPANIES
1
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
225,000
AVG SELL PX
TRADE KIND
SHOWING 22 / 22
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by David J. Chang, 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
7d1+100.00%+21.80%+1.46%+20.33%+20.33%
14d1+100.00%+7.26%+0.12%+7.15%+7.15%
30d1+100.00%+24.36%+0.59%+23.77%+23.77%
60d1+100.00%+20.51%-4.38%+24.89%+24.89%
90d1+100.00%+33.76%+2.73%+31.04%+31.04%
180d1(1 pending)
1y1(1 pending)
2y1(1 pending)
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
CABA · 225,000 shares · as of Mar 2, 2026
056,250112,500168,750225,000202120222023202420252026SHARES 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
FLOW · 15 buys / 7 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
225,000225,000Mar 2, 2026Mar 2, 2026View →
CABA
CABALETTA BIO, INC.
PURCHASE
Chief Medical Officer
8,800$2.26$19.9K8,800Jan 21, 2026Jan 21, 2026View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
150,0000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
48,83648,836May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
185,7090May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
38,23838,238May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
113,5000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
48,8360May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
130,000130,000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
185,709185,709May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
113,500113,500May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
135,0000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
130,0000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
SALE
Chief Medical Officer
38,2380May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
135,000135,000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
150,000150,000May 19, 2025May 19, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
145,000145,000Mar 3, 2025Mar 4, 2025View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
130,000130,000Mar 1, 2024Mar 4, 2024View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
150,000150,000Jan 18, 2023Jan 27, 2023View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
135,000135,000Jan 18, 2022Jan 19, 2022View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
113,500113,500Mar 1, 2021Mar 2, 2021View →
CABA
CABALETTA BIO, INC.
PURCHASEGRANT
Stock grant
38,23838,238Mar 1, 2020Mar 3, 2020View →
Other insiders · CABA
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About this filer
CIK 0001790552
ROLE
Chief Medical Officer
PRIMARY
CABA
COMPANIES
1
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001790552DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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