James Simons
Renaissance Technologies LLC
James Simons, along with a team of mathematicians, physicists, and computer scientists, founded Renaissance Technologies LLC — arguably the best quantitative investment company. Its flagship Medallion Fund has delivered an average annual return of over 66% since 1988.
Latest Changes
Indicators
Latest (2026Q2)
Previous (2026Q1)
Change
Mkt Value (report date)
72.62B
63.93B
+13.59%
Shares Held
3140
3213
-2.27%
Buys
1079
1132
-4.68%
Sells
1489
1176
+26.62%
Sector Allocation
No.
Name
% Portfolio
Shares Traded
Mkt Value (Date)
Market Value
Shares Held
Report Date
Watchlist
Latest Trades
No.
Name
Action
Shares Traded
% Change
Shares Held
Mkt Value (Date)
Report Date
Watchlist
5
Gossamer Bio Ord Shs (US) (US)
38341P102
Buy
+10.41M
+854.90%
11.63M
$1.91M
2026-06-30
10
Keel Infrastructure Ord Shs (CA) (CA)
09173B107
Exit
-7.77M
-100.00%
0.00
$0.00
2026-06-30