MarketPeel
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MA

Mark A. Alexander

BLDR
DIRECTOR · BUILDERS FIRSTSOURCE, INC. · CIK 0001212607
FILING MIX · LIFETIME100%/0%
BUYS
53
SELLS
0
TOTAL VALUE
$2.08M
COMPANIES
2
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
99,008
AVG SELL PX
—
TRADE KIND
SHOWING 53 / 53
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
8 backtested trades · 8 horizons · 1 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Mark A. Alexander, 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+62.50%-1.69%+1.19%-2.88%-1.06%—
14d8+62.50%+0.41%+2.92%-2.51%-0.46%—
30d8+62.50%+6.25%+7.68%-1.44%-2.17%—
60d8+50.00%+0.27%+10.78%-10.51%-7.76%—
90d8+62.50%+9.85%+16.17%-6.32%-8.17%—
180d8+75.00%+8.13%+20.19%-12.06%-11.77%—
1y8+87.50%+16.42%+38.87%-22.45%-20.03%—
2y8(1 pending)+85.71%+33.92%+59.16%-25.24%-23.16%—
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
BLDR · 47,913 shares · as of Jun 1, 2026
011,97823,95735,93547,913202120222023202420252026SHARES 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 · 53 buys / 0 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
409$76.26$31.2K47,913Jun 1, 2026Jun 2, 2026 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
2,558——47,504May 14, 2026May 18, 2026 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
299$104.29$31.2K44,946Mar 1, 2026Mar 3, 2026 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
278$112.23$31.2K44,647Dec 1, 2025Dec 3, 2025 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
438$68.47$30.0K51,095.359Oct 1, 2025Oct 3, 2025 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
225$138.68$31.2K44,369Sep 1, 2025Sep 3, 2025 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
2,778——49,923Jul 1, 2025Jul 2, 2025 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
476$62.99$30.0K50,399Jul 1, 2025Jul 2, 2025 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
290$107.68$31.2K44,144Jun 1, 2025Jun 3, 2025 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
1,707——43,854May 27, 2025May 29, 2025 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
475$63.03$29.9K47,145Apr 1, 2025Apr 3, 2025 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
224$138.99$31.1K42,147Mar 1, 2025Mar 18, 2025 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
224$138.99$31.1K42,147Feb 28, 2025Mar 4, 2025 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
552$54.29$30.0K46,402Jan 2, 2025Jan 3, 2025 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
167$186.47$31.1K41,923Dec 1, 2024Dec 3, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
5,000$55.29$276.4K45,850Nov 1, 2024Nov 5, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
489$61.32$30.0K40,613Oct 1, 2024Oct 2, 2024 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
179$174.00$31.1K41,756Sep 1, 2024Sep 4, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
2,000$57.03$114.1K40,124Aug 16, 2024Aug 20, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
3,500$55.87$195.5K38,124Aug 9, 2024Aug 12, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
663$54.63$36.2K34,435Jul 1, 2024Jul 1, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
3,203——33,772Jul 1, 2024Jul 1, 2024 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
1,194——41,577Jun 4, 2024Jun 4, 2024 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
194$160.79$31.2K40,383Jun 1, 2024Jun 4, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
655$55.27$36.2K30,382Apr 5, 2024Apr 9, 2024 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
156$199.98$31.2K40,189Mar 1, 2024Mar 5, 2024 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
558$64.85$36.2K29,584Jan 5, 2024Jan 8, 2024 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
224$139.28$31.2K40,033Dec 1, 2023Dec 5, 2023 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
210$148.74$31.2K39,809Sep 1, 2023Sep 6, 2023 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
2,553——28,671Jul 3, 2023Jul 5, 2023 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
1,446——39,599Jun 14, 2023Jun 16, 2023 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
269$115.86$31.2K38,153Jun 1, 2023Jun 5, 2023 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
1,000$72.48$72.5K26,118May 2, 2023May 3, 2023 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
306$85.76$26.2K37,884Mar 1, 2023Mar 3, 2023 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
411$63.73$26.2K37,578Dec 1, 2022Dec 5, 2022 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
446$58.76$26.2K37,167Sep 1, 2022Sep 6, 2022 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
1,919——25,118Jul 1, 2022Jul 6, 2022 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
2,722——36,721Jun 14, 2022Jun 16, 2022 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
411$63.81$26.2K33,999Jun 1, 2022Jun 3, 2022 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
359$73.05$26.2K33,588Mar 1, 2022Mar 3, 2022 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
373$70.22$26.2K33,229Dec 1, 2021Dec 3, 2021 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
489$53.59$26.2K32,856Sep 1, 2021Sep 3, 2021 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
2,141——23,199Jul 1, 2021Jul 6, 2021 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
3,459——32,367Jun 15, 2021Jun 17, 2021 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
590$44.47$26.2K28,908Jun 1, 2021Jun 3, 2021 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
951$44.84$42.6K28,318Mar 1, 2021Mar 2, 2021 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
1,660——27,367Jan 15, 2021Jan 20, 2021 ↗View →
BLDR
BUILDERS FIRSTSOURCE, INC.
PURCHASEGRANT
Stock grant
25,707——25,707Jan 1, 2021Jan 5, 2021 ↗View →
WPC
W. P. CAREY INC.
PURCHASEGRANT
Stock grant
2,180——21,058Jul 1, 2020Jul 6, 2020 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
4,000$58.78$235.1K18,878May 19, 2020May 21, 2020 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
2,000$58.65$117.3K14,878Mar 18, 2020Mar 19, 2020 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
1,000$61.59$61.6K12,878Mar 17, 2020Mar 19, 2020 ↗View →
WPC
W. P. CAREY INC.
PURCHASE
1,000$64.25$64.2K11,878Mar 17, 2020Mar 19, 2020 ↗View →
Other insiders · BLDR
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About this filer
CIK 0001212607
ROLE
Director
PRIMARY
BLDR
COMPANIES
2
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001212607DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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