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.
Stock Trading
All
Buys
Sells
No.
Name
Action
Shares Traded
% Change
Shares Held
Mkt Value (Date)
Report Date
Watchlist
Plug Power Inc (US)
PLUG
Sell
-15.96M
-57.50%
11.78M
$31.92M
2026-06-30
Nu Holdings Ltd (US)
NU
Sell
-13.44M
-82.60%
2.83M
$37.78M
2026-06-30
Transocean Ltd (US)
RIG
Buy
+11.39M
+363.40%
14.53M
$71.04M
2026-06-30
4
Nokia Oyj (US)
NOK
Sell
-10.83M
-81.40%
2.47M
$32.75M
2026-06-30
5
Gossamer Bio Ord Shs (US) (US)
38341P102
Buy
+10.41M
+854.90%
11.63M
$1.91M
2026-06-30
6
American Airlines Group Inc (US)
AAL
Exit
-9.69M
-100.00%
0.00
$0.00
2026-06-30
7
Vale SA (US)
VALE
Sell
-9.60M
-68.30%
4.45M
$66.96M
2026-06-30
8
Snap Inc (US)
SNAP
Buy
+8.77M
+465.10%
10.66M
$47.31M
2026-06-30
9
Alight Inc (US)
ALIT
Buy
+8.26M
+137.30%
14.28M
$8.00M
2026-06-30
10
Keel Infrastructure Ord Shs (CA) (CA)
09173B107
Exit
-7.77M
-100.00%
0.00
$0.00
2026-06-30