MarketPeel
Insider Trading Intelligence
JM

Jing L. Marantz

SRRK
CHIEF MEDICAL OFFICER · SCHOLAR ROCK HOLDING CORP · CIK 0001834528
FILING MIX · LIFETIME56%/44%
BUYS
22
SELLS
17
TOTAL VALUE
$5.09M
COMPANIES
3
ACTIVE SINCE
Jan 2021
HOLDINGS NOW
346,012
AVG SELL PX
$29.91
TRADE KIND
SHOWING 39 / 39
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
12 backtested trades · 8 horizons · 16 pending
Forward-return performance of every backtestable P/S trade by Jing L. Marantz, 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
7d12+41.67%-1.47%+1.30%-2.77%-0.39%
14d12+50.00%+9.18%+1.41%+7.77%+8.96%
30d12+41.67%+10.32%+1.34%+8.98%+11.75%
60d12+16.67%+18.04%+2.10%+15.93%+13.90%
90d12+41.67%+9.74%+1.68%+8.05%+3.99%
180d12(2 pending)+80.00%-14.65%-4.24%-10.42%-14.13%
1y12(2 pending)+0.00%+13.17%+15.40%-2.23%-3.75%
2y12(12 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
SRRK · 126,012 shares · as of Feb 17, 2026
062,500125,000187,500250,0002023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 22 buys / 17 sellsCOVERAGE · 22 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
15,00015,000Jun 5, 2026Jun 15, 2026View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
4,157$46.53$193.4K126,012Feb 17, 2026Feb 19, 2026View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASEGRANT
Stock grant
34,482130,169Feb 9, 2026Feb 11, 2026View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
5,798$44.48$257.9K95,687Jan 16, 2026Jan 21, 2026View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
15,00015,000Jun 9, 2025Jun 11, 2025View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASEGRANT
Stock grant
45,71545,715Mar 10, 2025Mar 12, 2025View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASEGRANT
Stock grant
34,285101,485Mar 10, 2025Mar 12, 2025View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
5,655$44.20$249.9K67,200Jan 16, 2025Jan 21, 2025View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
1,000$38.04$38.0K78,230Nov 25, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASE
CHIEF MEDICAL OFFICER
6,375$8.59$54.8K79,230Nov 25, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
6,375130,000Nov 25, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
2,100$39.25$82.4K76,130Nov 25, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
200$40.72$8.1K72,855Nov 25, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
3,075$39.93$122.8K73,055Nov 25, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
2,145136,375Nov 22, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
2,145$30.01$64.4K72,855Nov 22, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASE
CHIEF MEDICAL OFFICER
2,145$8.59$18.4K75,000Nov 22, 2024Nov 26, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
2,105138,520Nov 11, 2024Nov 13, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
2,105$30.00$63.2K72,855Nov 11, 2024Nov 13, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASE
CHIEF MEDICAL OFFICER
2,105$8.59$18.1K74,960Nov 11, 2024Nov 13, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE
CHIEF MEDICAL OFFICER
109,375140,625Oct 7, 2024Oct 7, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
2,552$26.22$66.9K112,230Oct 7, 2024Oct 7, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
67,448$25.59$1.73M114,782Oct 7, 2024Oct 7, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
SALE10b5-1
10b5-1 plan
39,375$30.06$1.18M72,855Oct 7, 2024Oct 7, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASE
CHIEF MEDICAL OFFICER
109,375$8.59$939.5K182,230Oct 7, 2024Oct 7, 2024View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
15,00015,000Jun 14, 2024Jun 18, 2024View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASE
3,1313,131Jun 14, 2024Jun 18, 2024View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
SALE
3,1310Jun 14, 2024Jun 18, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASEGRANT
Stock grant
72,85572,855Feb 12, 2024Feb 13, 2024View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASEGRANT
Stock grant
97,14597,145Feb 12, 2024Feb 13, 2024View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
11,86911,869Aug 1, 2023Aug 3, 2023View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
3,1313,131Aug 1, 2023Aug 3, 2023View →
SRRK
SCHOLAR ROCK HOLDING CORP
PURCHASEGRANT
Stock grant
250,000250,000Nov 14, 2022Nov 15, 2022View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
15,00015,000Jun 23, 2022Jun 27, 2022View →
KRYS
KRYSTAL BIOTECH, INC.
PURCHASEGRANT
Stock grant
205,000205,000Jan 31, 2022Jan 31, 2022View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
20,00020,000Dec 7, 2021Dec 9, 2021View →
ARCT
ARCTURUS THERAPEUTICS HOLDINGS INC.
PURCHASEGRANT
Stock grant
6,6996,699Dec 7, 2021Dec 9, 2021View →
KRYS
KRYSTAL BIOTECH, INC.
PURCHASEGRANT
Stock grant
6,8006,800Jun 30, 2021Jul 2, 2021View →
KRYS
KRYSTAL BIOTECH, INC.
PURCHASEGRANT
Stock grant
13,60013,600Jan 4, 2021Jan 5, 2021View →
Other insiders · SRRK
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About this filer
CIK 0001834528
ROLE
Chief Medical Officer
PRIMARY
SRRK
COMPANIES
3
ACTIVE SINCE
Jan 2021
MARKETPEEL · /INSIDER/0001834528DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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