Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Apple
AAPL
|
+$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.8M |
| 4 |
Amazon
AMZN
|
+$38.6M |
| 5 |
Tesla
TSLA
|
+$36M |
Top Sells
| 1 |
Alibaba
BABA
|
+$46.4M |
| 2 |
Boeing
BA
|
+$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
NVIDIA
NVDA
|
+$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1001
Amicus Therapeutics
FOLD
$2.45B
| $103K | ﹤0.01% |
10,672
+2,968
| +39% | +$28.6K |
|
1002
Sea Limited
SE
$114B
| $103K | ﹤0.01% |
2,567
-33,758
| -93% | -$1.35M |
|
1003
VirnetX
VHC
$74.6M
| $103K | ﹤0.01% |
1,361
+125
| +10% | +$9.46K |
|
1004
Taylor Morrison
TMHC
$6.89B
| $102K | ﹤0.01% |
+4,688
| New | +$102K |
|
1005
ProShares Ultra Bloomberg Crude Oil
UCO
$362M
| $102K | ﹤0.01% |
804
-4,897
| -86% | -$621K |
|
|
LJPC
1006
DELISTED
La Jolla Pharmaceutical Company
LJPC
| $102K | ﹤0.01% |
25,957
+15,766
| +155% | +$62K |
|
1007
CubeSmart
CUBE
$9.29B
| $101K | ﹤0.01% |
+3,217
| New | +$101K |
|
|
PRVB
1008
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $101K | ﹤0.01% |
6,824
-111
| -2% | -$1.64K |
|
|
BRKL
1009
DELISTED
Brookline Bancorp
BRKL
| $100K | ﹤0.01% |
6,116
+1,179
| +24% | +$19.3K |
|
1010
Gran Tierra Energy
GTE
$143M
| $100K | ﹤0.01% |
7,769
+2,492
| +47% | +$32.1K |
|
1011
Masimo
MASI
$7.92B
| $100K | ﹤0.01% |
+633
| New | +$100K |
|
|
USX
1012
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $100K | ﹤0.01% |
19,882
+10,984
| +123% | +$55.2K |
|
1013
AMN Healthcare
AMN
$751M
| $99K | ﹤0.01% |
1,601
+843
| +111% | +$52.1K |
|
1014
CarMax
KMX
$8.88B
| $99K | ﹤0.01% |
+1,130
| New | +$99K |
|
1015
Stride
LRN
$6.89B
| $99K | ﹤0.01% |
4,869
+2,563
| +111% | +$52.1K |
|
1016
Starwood Property Trust
STWD
$7.6B
| $99K | ﹤0.01% |
3,996
-1,438
| -26% | -$35.6K |
|
1017
Global X Uranium ETF
URA
$4.31B
| $99K | ﹤0.01% |
8,948
+2,852
| +47% | +$31.6K |
|
|
CVA
1018
DELISTED
Covanta Holding Corporation
CVA
| $99K | ﹤0.01% |
6,701
-10,280
| -61% | -$152K |
|
1019
Camtek
CAMT
$3.71B
| $98K | ﹤0.01% |
+9,122
| New | +$98K |
|
1020
Paysign
PAYS
$281M
| $98K | ﹤0.01% |
9,722
-7,850
| -45% | -$79.1K |
|
1021
Banco Santander
SAN
$148B
| $98K | ﹤0.01% |
24,753
-207,186
| -89% | -$820K |
|
|
LEAF
1022
DELISTED
Leaf Group Ltd.
LEAF
| $98K | ﹤0.01% |
24,676
+22,754
| +1,184% | +$90.4K |
|
|
GMLP
1023
DELISTED
Golar LNG Partners LP
GMLP
| $98K | ﹤0.01% |
+11,092
| New | +$98K |
|
|
CY
1024
DELISTED
Cypress Semiconductor
CY
| $98K | ﹤0.01% |
4,202
-27,117
| -87% | -$632K |
|
1025
Mid-America Apartment Communities
MAA
$16.6B
| $97K | ﹤0.01% |
+741
| New | +$97K |
|