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
|
+$35.2M |
| 2 |
Micron Technology
MU
|
+$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$29.5M |
| 4 |
NVIDIA
NVDA
|
+$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$33.4M |
| 3 |
Tesla
TSLA
|
+$19.8M |
| 4 |
Netflix
NFLX
|
+$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
+$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
SIOX
851
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $149K | ﹤0.01% |
8,291
+6,855
| +477% | +$123K |
|
852
Globus Medical
GMED
$8.04B
| $148K | ﹤0.01% |
+2,940
| New | +$148K |
|
853
Hormel Foods
HRL
$14B
| $148K | ﹤0.01% |
3,985
+3,385
| +564% | +$126K |
|
|
SIR
854
DELISTED
SELECT INCOME REIT
SIR
| $148K | ﹤0.01% |
+14,985
| New | +$148K |
|
855
Barings BDC
BBDC
$993M
| $147K | ﹤0.01% |
+12,834
| New | +$147K |
|
856
Winnebago Industries
WGO
$1.02B
| $146K | ﹤0.01% |
+3,603
| New | +$146K |
|
857
BlackBerry
BB
$2.29B
| $145K | ﹤0.01% |
15,030
-80,095
| -84% | -$773K |
|
858
Civitas Resources
CIVI
$3.11B
| $145K | ﹤0.01% |
+3,837
| New | +$145K |
|
|
EMWP
859
DELISTED
Eros Media World PLC
EMWP
| $145K | ﹤0.01% |
558
-1,105
| -66% | -$287K |
|
|
ECHO
860
DELISTED
Echo Global Logistics, Inc.
ECHO
| $145K | ﹤0.01% |
4,972
-7,667
| -61% | -$224K |
|
|
IPHI
861
DELISTED
INPHI CORPORATION
IPHI
| $145K | ﹤0.01% |
+4,475
| New | +$145K |
|
862
Prospect Capital
PSEC
$1.33B
| $144K | ﹤0.01% |
21,533
+11,819
| +122% | +$79K |
|
863
Direxion Daily Semiconductor Bear 3X Shares
SOXS
$1.27B
| $144K | ﹤0.01% |
+1
| New | +$144K |
|
864
EnerSys
ENS
$3.92B
| $143K | ﹤0.01% |
1,929
+530
| +38% | +$39.3K |
|
865
PJT Partners
PJT
$4.41B
| $143K | ﹤0.01% |
+2,695
| New | +$143K |
|
866
STMicroelectronics
STM
$23.7B
| $143K | ﹤0.01% |
6,497
+1,925
| +42% | +$42.4K |
|
867
USA Compression Partners
USAC
$2.84B
| $143K | ﹤0.01% |
8,512
+7,614
| +848% | +$128K |
|
868
Kadant
KAI
$3.84B
| $142K | ﹤0.01% |
1,480
+232
| +19% | +$22.3K |
|
|
NTP
869
DELISTED
Nam Tai Property Inc.
NTP
| $142K | ﹤0.01% |
13,008
+3,680
| +39% | +$40.2K |
|
|
PRMW
870
DELISTED
Primo Water Corporation
PRMW
| $142K | ﹤0.01% |
+8,121
| New | +$142K |
|
871
Liberty Media Series A
FWONA
$23.1B
| $141K | ﹤0.01% |
4,190
+3,137
| +298% | +$106K |
|
872
Viking Therapeutics
VKTX
$2.87B
| $141K | ﹤0.01% |
14,954
+7,157
| +92% | +$67.5K |
|
|
SJR
873
DELISTED
Shaw Communications Inc.
SJR
| $141K | ﹤0.01% |
6,956
+3,172
| +84% | +$64.3K |
|
874
Molina Healthcare
MOH
$9.51B
| $140K | ﹤0.01% |
+1,436
| New | +$140K |
|
875
PTC Therapeutics
PTCT
$4.52B
| $140K | ﹤0.01% |
+4,161
| New | +$140K |
|