InsidersTradesSigma
Total declarations
Companies
▲ Purchases (4 ops.)
▼ Sales (0 ops.)
Insider track record
Board DirectorDisclosed buys
4
Disclosed sells
0
T+90 hit rate
33%
T+90 mean return
+0.5%
Across 3 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.
Companies and markets linked to Alexander Mark A
Open company profiles for insider transactions, fundamentals and analyst consensus when 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
278 shares@ US$112.234.6% of flowCommon Stock, par value $0.01 per shareSEC:0001193125-25-306902:0
438 shares@ US$68.473.3% of flowCommon StockSEC:0001025378-25-000136:0
225 shares@ US$138.684.8% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-25-112819:0
2,778 shares0Common StockSEC:0001025378-25-000104:0
290 shares@ US$107.684.6% of flowCommon Stock, par value $0.01 per shareSEC:0000950170-25-080906:0
1,707 shares0Common Stock, par value $0.01 per shareSEC:0000950170-25-078919:0
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
Canonical exit: 30 Jan 2025 (T+90)
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
Canonical exit: 14 Nov 2024 (T+90)
3,500 shares@ US$55.865923.8% of flowCommon StockSEC:0001025378-24-000124:0
Canonical exit: 7 Nov 2024 (T+90)
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
25 of 42 declarations
About Alexander Mark A
ALEXANDER MARK A is Administrateur at Builders FirstSource, Inc. and W. P. Carey Inc. He has 42 filings in total, and across the 42 sampled filings between 2021-06-03 and 2026-06-02, buys total 602830 EUR and sells total 0 EUR, with the most frequent transaction nature listed as Attribution.
