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Insider Trading Intelligence
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TK

Thomas M. Krummel

CWT
DIRECTOR · CALIFORNIA WATER SERVICE GROUP · CIK 0001495768
FILING MIX · LIFETIME47%/53%
BUYS
22
SELLS
25
TOTAL VALUE
$4.35M
COMPANIES
2
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
26,331
AVG SELL PX
$48.81
TRADE KIND
SHOWING 47 / 47
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
20 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Thomas M. Krummel, 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
7d20+65.00%-1.87%+0.49%-2.36%-1.86%—
14d20+50.00%-0.90%+0.97%-1.87%-1.73%—
30d20+50.00%+0.96%+2.79%-1.83%-2.20%—
60d20+55.00%+5.13%+5.98%-0.85%-6.87%—
90d20+50.00%+1.06%+5.92%-4.86%-7.39%—
180d20+55.00%+5.56%+9.97%-4.41%-17.83%—
1y20+70.00%-3.90%+17.30%-21.20%-26.94%—
2y20(3 pending)+76.47%-5.34%+43.85%-49.19%-63.03%—
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
CWT · 23,805 shares · as of May 21, 2026
07,65915,31722,97630,634202120222023202420252026SHARES 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 · 22 buys / 25 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CWT
CALIFORNIA WATER SERVICE GROUP
SALE
3,700$43.30$160.2K23,805May 21, 2026May 21, 2026 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
2,816——27,504.8Mar 3, 2026Mar 5, 2026 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
2,645——24,623.8Mar 4, 2025Mar 6, 2025 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$55.09$30.6K21,950.8Sep 4, 2024Sep 4, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$54.33$30.2K22,505.8Aug 21, 2024Aug 22, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$52.91$29.4K23,060.8Aug 7, 2024Aug 8, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$52.99$29.4K23,616Jul 17, 2024Jul 17, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
1,654$50.07$82.8K24,171Jul 11, 2024Jul 11, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
2,488$49.62$123.5K25,824.8Jun 5, 2024Jun 6, 2024 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
1,376——47,007Jun 4, 2024Jun 6, 2024 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
2,526——2,526Jun 4, 2024Jun 6, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$53.26$29.6K23,318May 15, 2024May 15, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
2,220$50.00$111.0K23,873May 1, 2024May 1, 2024 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE10b5-1
10b5-1 plan
20,000$60.00$1.20M45,631May 1, 2024May 3, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
2,477$45.37$112.4K28,570Mar 5, 2024Mar 7, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
0——26,093Mar 5, 2024Mar 18, 2024 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE10b5-1
10b5-1 plan
8,238$48.99$403.6K65,631Mar 4, 2024Mar 6, 2024 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE10b5-1
10b5-1 plan
11,762$48.21$567.1K73,869Mar 4, 2024Mar 6, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$51.90$28.8K26,066Jan 3, 2024Jan 4, 2024 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$53.45$29.7K26,621Dec 20, 2023Dec 20, 2023 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE
555$53.06$29.4K27,176Dec 6, 2023Dec 7, 2023 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
555$51.77$28.7K27,731Nov 15, 2023Nov 15, 2023 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE10b5-1
10b5-1 plan
2,220$50.00$111.0K28,286Nov 2, 2023Nov 3, 2023 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
4,865——4,865Jun 15, 2023Jun 16, 2023 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
2,711——85,631Jun 15, 2023Jun 16, 2023 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
1,870$58.83$110.0K30,506Mar 7, 2023Mar 9, 2023 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE
469$64.89$30.4K28,636Dec 13, 2022Dec 19, 2022 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
SALE
1,529$62.92$96.2K29,105Nov 30, 2022Nov 30, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
2,689——16,792Jun 22, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASE
2,689$4.51$12.1K102,920Jun 22, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASE
6,834$4.51$30.8K100,231Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
10,477——0Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
6,834——19,481Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
10,477$36.14$378.6K92,443Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASE
10,477$1.33$13.9K93,397Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
6,834$36.14$246.9K85,609Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
2,689$35.00$94.1K82,920Jun 21, 2022Jun 22, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
4,205——8,410Jun 7, 2022Jun 8, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
2,001$37.48$75.0K82,920Jun 7, 2022Jun 8, 2022 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
1,650——30,634Mar 1, 2022Mar 3, 2022 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASE
5,963——75,919Sep 17, 2021Sep 21, 2021 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
SALE
5,963——0Sep 17, 2021Sep 21, 2021 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASE
5,000$25.00$125.0K80,919Sep 17, 2021Sep 21, 2021 ↗View →
PRCT
PROCEPT BIOROBOTICS CORP
PURCHASEGRANT
Stock grant
10,308——10,308Sep 14, 2021Sep 16, 2021 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
1,529——28,984Mar 2, 2021Mar 3, 2021 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
214——27,455Jan 4, 2021Jan 6, 2021 ↗View →
CWT
CALIFORNIA WATER SERVICE GROUP
PURCHASEGRANT
Stock grant
1,630——27,241Mar 3, 2020Mar 5, 2020 ↗View →
Other insiders · CWT
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About this filer
CIK 0001495768
ROLE
Director
PRIMARY
CWT
COMPANIES
2
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001495768DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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One short email. Insider buys, congressional trades, and plain-English analysis.

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