InsidersTradesSigma
Total declarations
Companies
▲ Purchases (4 ops.)
▼ Sales (0 ops.)
Insider track record
Board DirectorDisclosed buys
4
Disclosed sells
0
T+90 hit rate
51%
T+90 mean return
+6.1%
Across 35 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Discover the detailed record of transactions filed by ALEXANDER MARK A, Director. Director active across 2 companies, notably Builders FirstSource, Inc.. Cumulatively, 42 disclosures have been recorded. Split: 4 buys · 0 sell. Total volume traded: €603k. Activity tracked since 1 June 2021. The latest transaction was filed on 1 June 2026 (Attribution). Regulator: SEC (Form 4). All data is openly available.
Declarations42 total
409 shares@ US$76.260.0004% mcap4.5% of flowCommon Stock, par value $0.01 per shareSEC:0001193125-26-253465:0
299 shares@ US$104.294.4% of flowCommon Stock, par value $0.01 per shareSEC:0001193125-26-088143:0
290 shares@ US$107.684.6% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-25-080906:0
475 shares@ US$63.033.7% of flowCommon StockSEC:0001025378-25-000055:0
224 shares@ US$138.995.0% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-25-041133:0
224 shares@ US$138.995.0% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-25-031958:0
552 shares@ US$54.293.8% of flowCommon StockSEC:0001025378-25-000003:0
167 shares@ US$186.474.9% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-24-132741:0
5,000 shares@ US$55.286133.7% of flowCommon StockSEC:0001025378-24-000144:0
Ideal exit: 29 Jul 2025 (T+270)
489 shares@ US$61.323.6% of flowCommon StockSEC:0001025378-24-000131:0
179 shares@ US$174.004.7% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-24-103596:0
2,000 shares@ US$57.029713.8% of flowCommon StockSEC:0001025378-24-000128:0
Ideal exit: 13 May 2025 (T+270)
3,500 shares@ US$55.865923.8% of flowCommon StockSEC:0001025378-24-000124:0
Ideal exit: 6 May 2025 (T+270)
3,203 shares0Common StockSEC:0001025378-24-000103:0
194 shares@ US$160.794.8% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-24-068954:0
1,194 shares0Common Stock, par value $0.01 per shareSEC:0000950170-24-068954:1
655 shares@ US$55.274.4% of flowCommon StockSEC:0001025378-24-000071:0
156 shares@ US$199.984.8% of flowCommon Stock, par value $0.01 per shareSEC:0001209191-24-004429:0
558 shares@ US$64.854.4% of flowCommon StockSEC:0001025378-24-000003:0
224 shares@ US$139.284.8% of flowCommon Stock, par value $0.01 per shareSEC:0001209191-23-057527:0
210 shares@ US$148.744.8% of flowCommon Stock, par value $0.01 per shareSEC:0001209191-23-048503:0
2,553 shares0Common StockSEC:0001025378-23-000092:0
1,446 shares0Common Stock, par value $0.01 per shareSEC:0001209191-23-038048:0
269 shares@ US$115.864.8% of flowCommon Stock, par value $0.01 per shareSEC:0001209191-23-034564:0
1,000 shares@ US$72.47928.7% of flowCommon StockSEC:0001025378-23-000084:0
Ideal exit: 27 Jan 2024 (T+270)
25 of 42 declarations
About ALEXANDER MARK A
Mark A Alexander is a Board Member at Builders FirstSource, Inc. and W. P. Carey Inc. With diverse experience in the construction and real estate sectors, he provides strategic expertise to the board, contributing to informed decision-making for both companies.
