InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (6 ops.)
Insider track record
Board DirectorDisclosed buys
0
Disclosed sells
6
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Browse the detailed record of transactions filed by Altman Steven R, Director. Insider active across 1 company, notably DEXCOM INC. Cumulatively, 14 reports have been recorded. Split: 0 buy · 6 sells. Total volume traded: €871k. Activity tracked since 20 May 2021. The latest transaction was filed on 28 May 2026 (Attribution). Regulator: SEC (Form 4). All data is openly available.
Companies and markets linked to Altman Steven R
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations14 total
5,565 shares0Common StockSEC:0001093557-26-000125:0
2,613 shares0Common StockSEC:0001093557-25-000147:0
2,613 shares0Common StockSEC:0001093557-24-000111:0
2,885 shares0Common StockSEC:0001093557-24-000091:0
2,885 shares0Common StockSEC:0001093557-24-000091:1
460 shares@ US$121.96615.9% of flowCommon StockSEC:0001093557-24-000010:0
2,000 shares@ US$122.774225.6% of flowCommon StockSEC:0001093557-23-000245:0
3,000 shares@ US$120.001438.4% of flowCommon StockSEC:0001093557-23-000242:0
1,000 shares@ US$101.25610.7% of flowCommon StockSEC:0001093557-23-000226:0
1,000 shares@ US$77.588.4% of flowCommon StockSEC:0001093557-23-000207:0
1,000 shares@ US$101.49536.4% of flowCommon StockSEC:0001093557-23-000203:0
2,885 shares@ US$0.0010.0% of flowCommon StockSEC:0001093557-23-000142:0
910 shares0Common StockSEC:0001093557-22-000113:0
806 shares0Common StockSEC:0001093557-21-000134:0
14 of 14 declarations
About Altman Steven R
ALTMAN STEVEN R is Administrateur at DEXCOM INC (XNAS). The declarant has 14 filings in total, and across the sampled recent filings from 2021-05-25 to 2026-06-01, the transactions are all sells, with sum_sell_eur of 870986 and sum_buy_eur of 0.
