InsidersTradesSigma
Total declarations
Companies
▲ Purchases (1 ops.)
▼ Sales (18 ops.)
Insider track record
CEODisclosed buys
1
Disclosed sells
18
T+90 hit rate
40%
T+90 mean return
+11.1%
Across 5 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Browse the full record of transactions filed by Lewis William, Chairman & CEO. Insider active across 4 companies, notably INSMED Inc. Aggregated, 55 filings have been published. Split: 1 buy · 18 sells. Total volume traded: €5.2m. Activity tracked since 15 May 2021. The latest transaction was filed on 13 May 2026 (Cession). Regulator: SEC (Form 4). The full history is free.
Declarations55 total
12,518 sharesCommon StockSEC:0001402051-26-000038:0
8,880 sharesCommon StockSEC:0001402051-26-000038:1
12,091 sharesCommon StockSEC:0001402051-26-000038:2
1,836 sharesCommon StockSEC:0001402051-26-000038:3
3,723 sharesCommon StockSEC:0001402051-26-000038:4
2,456 sharesCommon StockSEC:0001402051-26-000038:5
1,292 sharesCommon StockSEC:0001402051-26-000038:6
13,283 shares@ US$116.180.0035% mcap71.2% of flowCommon StockSEC:0001402051-26-000028
13,283 shares@ US$116.180.0035% mcap51.0% of flowCommon StockSEC:0001402051-26-000028:0
9,489 shares@ US$66.876.3% of flowCommon StockSEC:0001628280-25-027339:0
22,314 shares0Common StockSEC:0001628280-25-026583:0
9,743 shares@ US$66.406.5% of flowCommon StockSEC:0001628280-25-025987:0
6,830 shares@ US$10.850.7% of flowCommon StockSEC:0001628280-25-021897:0
6,830 shares@ US$10.850.7% of flowCommon StockSEC:0001628280-25-017995:0
6,830 shares@ US$10.850.8% of flowCommon StockSEC:0001628280-25-016508:0
18,750 shares@ US$22.764.4% of flowCommon StockSEC:0001628280-25-013864:0
18,750 shares@ US$22.764.6% of flowCommon StockSEC:0001628280-25-010590:0
18,750 shares@ US$22.764.6% of flowCommon StockSEC:0001628280-25-006807:0
153,710 shares0Common StockSEC:0001628280-25-004461:0
18,750 shares@ US$22.764.7% of flowCommon StockSEC:0001628280-25-004076:0
18,750 shares@ US$22.764.7% of flowCommon StockSEC:0001628280-25-001732:0
8,218 shares@ US$66.025.9% of flowCommon StockSEC:0001628280-25-001203:0
6,960 sharesOrdinary SharesSEC:0000950170-25-003561:0
18,750 shares@ US$22.764.6% of flowCommon StockSEC:0001628280-25-000403:0
18,750 shares@ US$22.764.6% of flowCommon StockSEC:0001628280-24-052229:0
25 of 55 declarations
About Lewis William
Lewis William is Chair and CEO of INSMED Inc and a director of NewAmsterdam Pharma Co N.V. He has made a total of 55 filings. In the most recent filings, he sold a total of 5,188,114 euros, with notable transactions including a sale of 1,317,183.65 euros on May 15, 2026, and another sale of the same amount on the same day. The first filings date back to February 3, 2016, and the most recent continue until June 26, 2026.
