MarketPeel
Insider Trading Intelligence
BL

Berkshire Fund Ix, L.p.

WMS
10% OWNER · ADVANCED DRAINAGE SYSTEMS, INC. · CIK 0001658315
FILING MIX · LIFETIME15%/85%
BUYS
4
SELLS
23
TOTAL VALUE
$636.86M
COMPANIES
1
ACTIVE SINCE
Jun 2020
HOLDINGS NOW
6,367,265
AVG SELL PX
$100.33
TRADE KIND
SHOWING 27 / 27
Trades · vs SPY
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Performance · forward returns vs SPY
8 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Berkshire Fund Ix, L.p., 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%+5.60%-0.20%+5.79%+8.04%
14d8+12.50%+7.13%+1.30%+5.83%+7.91%
30d8+50.00%+9.74%+1.66%+8.08%+11.58%
60d8+50.00%+17.89%+1.43%+16.46%+21.51%
90d8+50.00%+24.35%+1.72%+22.63%+22.70%
180d8+50.00%+28.67%+2.99%+25.68%+28.86%
1y8+50.00%+42.37%+12.88%+29.49%+37.43%
2y8+0.00%+20.57%+9.25%+11.32%+11.27%
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
WMS · 6,367,265 shares · as of Dec 14, 2021
03,140,6276,281,2559,421,88212,562,5092021SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2021
2021
2021
2021
FLOW · 4 buys / 23 sellsCOVERAGE · 7 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILED
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
10,114$125.25$1.27M63,995Dec 14, 2021Dec 16, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
10,116$125.25$1.27M62,107Dec 14, 2021Dec 16, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
729,770$125.25$91.40M6,367,265Dec 14, 2021Dec 16, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
620,082$126.79$78.62M7,097,035Nov 11, 2021Nov 15, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
9,958$126.79$1.26M74,109Nov 11, 2021Nov 15, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
9,960$126.79$1.26M72,223Nov 11, 2021Nov 15, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
1,425,823$109.75$156.48M7,717,117Sep 14, 2021Sep 16, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
15,085$109.75$1.66M82,183Sep 14, 2021Sep 16, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
15,082$109.75$1.66M84,067Sep 14, 2021Sep 16, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
1,455,341$103.61$150.79M9,142,940Mar 10, 2021Mar 12, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
21,610$103.61$2.24M99,149Mar 10, 2021Mar 12, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
19,045$103.61$1.97M97,268Mar 10, 2021Mar 12, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
PURCHASE
1$96.75$9710,598,281Feb 18, 2021Feb 22, 2021
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
1,628,873$75.00$122.17M10,598,280Dec 10, 2020Dec 14, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
22,598$75.00$1.69M120,759Dec 10, 2020Dec 14, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
18,529$75.00$1.39M116,313Dec 10, 2020Dec 14, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
55,736$64.19$3.58M12,227,153Nov 18, 2020Nov 18, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
50,000$64.14$3.21M12,282,889Nov 17, 2020Nov 18, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
25,000$64.50$1.61M12,397,889Nov 16, 2020Nov 18, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
65,000$65.55$4.26M12,332,889Nov 16, 2020Nov 18, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
18,820$64.15$1.21M12,422,889Nov 13, 2020Nov 13, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
800$64.00$51.2K12,441,709Nov 12, 2020Nov 13, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
76,200$64.93$4.95M12,486,309Nov 11, 2020Nov 13, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
SALE
43,800$65.38$2.86M12,442,509Nov 11, 2020Nov 13, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
PURCHASE
1$43.71$44134,842Jun 11, 2020Jun 15, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
PURCHASE
1$43.71$44143,357Jun 11, 2020Jun 15, 2020
WMS
ADVANCED DRAINAGE SYSTEMS, INC.
PURCHASE
48$43.71$2.1K12,562,509Jun 11, 2020Jun 15, 2020
Other insiders · WMS
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About this filer
CIK 0001658315
ROLE
10% Owner
PRIMARY
WMS
COMPANIES
1
ACTIVE SINCE
Jun 2020
MARKETPEEL · /INSIDER/0001658315DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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