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 | +$216M | |
| 2 | +$159M | |
| 3 | +$128M | |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 | +$141M | |
| 2 | +$53.1M | |
| 3 | +$45.7M | |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
Eli Lilly
LLY
$911B
| $4.12M | ﹤0.01% |
+5,286
|
|
||
127
Home Depot
HD
$369B
| $4.11M | ﹤0.01% |
11,202
-20,344
|
|
||
128
Flex
FLEX
$23.3B
| $4.09M | ﹤0.01% |
82,051
+79,725
|
|
||
129
Ford
F
$53.6B
| $4.07M | ﹤0.01% |
375,382
-848,218
|
|
||
130
DocuSign
DOCU
$13.9B
| $4.04M | ﹤0.01% |
51,883
+33,458
|
|
||
131
Fluor
FLR
$7.37B
| $4.04M | ﹤0.01% |
78,818
+77,852
|
|
||
132
Direxion Daily Semiconductor Bear 3X Shares
SOXS
$967M
| $3.97M | ﹤0.01% |
+503,236
|
|
||
|
SII
133
Sprott
SII
$2.38B
| $3.96M | ﹤0.01% |
57,284
+28,056
|
|
||
|
BTC
134
Grayscale Bitcoin Mini Trust ETF
BTC
$4.43B
| $3.95M | ﹤0.01% |
82,688
+50,567
|
|
||
135
AGNC Investment
AGNC
$10.9B
| $3.91M | ﹤0.01% |
425,645
-98,762
|
|
||
136
Sanmina
SANM
$9.24B
| $3.9M | ﹤0.01% |
+39,845
|
|
||
137
Pitney Bowes
PBI
$1.5B
| $3.85M | ﹤0.01% |
353,127
+171,309
|
|
||
138
Global X Silver Miners ETF NEW
SIL
$3.47B
| $3.8M | ﹤0.01% |
78,910
+4,628
|
|
||
139
Futu Holdings
FUTU
$25.9B
| $3.79M | ﹤0.01% |
30,673
+18,722
|
|
||
140
TeraWulf
WULF
$5.29B
| $3.78M | ﹤0.01% |
863,094
+560,895
|
|
||
|
AEVA
141
Aeva Technologies
AEVA
$677M
| $3.75M | ﹤0.01% |
99,201
+71,462
|
|
||
|
GAP
142
The Gap Inc
GAP
$9.24B
| $3.73M | ﹤0.01% |
+171,061
|
|
||
143
CyberArk
CYBR
$25.2B
| $3.73M | ﹤0.01% |
9,159
+6,927
|
|
||
|
PARA
144
DELISTED
Paramount Global Class B
PARA
| $3.72M | ﹤0.01% |
+288,587
|
|
||
145
Curtiss-Wright
CW
$21.3B
| $3.62M | ﹤0.01% |
+7,403
|
|
||
146
iShares 3-7 Year Treasury Bond ETF
IEI
$17B
| $3.59M | ﹤0.01% |
30,142
+17,184
|
|
||
147
GraniteShares 2x Long AMD Daily ETF
AMDL
$1.55B
| $3.59M | ﹤0.01% |
421,723
+283,100
|
|
||
148
FedEx
FDX
$63.4B
| $3.58M | ﹤0.01% |
15,752
+7,884
|
|
||
149
Bloom Energy
BE
$30B
| $3.56M | ﹤0.01% |
148,869
+35,689
|
|
||
150
FirstEnergy
FE
$26.8B
| $3.5M | ﹤0.01% |
86,990
-78,489
|
|