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 | |
|---|---|---|---|---|---|---|
|
SODA
651
DELISTED
SodaStream International Ltd
SODA
| $267K | ﹤0.01% |
+3,132
| New | +$267K |
|
652
EchoStar
SATS
$23.2B
| $266K | ﹤0.01% |
7,411
+7,290
| +6,025% | +$262K |
|
|
BEST
653
DELISTED
BEST Inc. American Depositary Shares, each representing twenty (20) Class A Ordinary Shares
BEST
| $266K | ﹤0.01% |
+1,090
| New | +$266K |
|
|
EVRI
654
DELISTED
Everi Holdings
EVRI
| $265K | ﹤0.01% |
36,923
+30,965
| +520% | +$222K |
|
655
Geron
GERN
$874M
| $264K | ﹤0.01% |
+77,188
| New | +$264K |
|
|
XEC
656
DELISTED
CIMAREX ENERGY CO
XEC
| $264K | ﹤0.01% |
2,598
-4,649
| -64% | -$472K |
|
|
SNR
657
DELISTED
NEW SENIOR INVESTMENT GROUP INC.
SNR
| $263K | ﹤0.01% |
34,857
+18,258
| +110% | +$138K |
|
658
Vishay Intertechnology
VSH
$2.09B
| $261K | ﹤0.01% |
11,271
+6,999
| +164% | +$162K |
|
|
BAS
659
DELISTED
Basis Energy Services, Inc.
BAS
| $261K | ﹤0.01% |
23,563
+23,162
| +5,776% | +$257K |
|
660
Exelon
EXC
$43.4B
| $260K | ﹤0.01% |
+8,565
| New | +$260K |
|
661
Teucrium Wheat Fund
WEAT
$118M
| $259K | ﹤0.01% |
+40,667
| New | +$259K |
|
662
JetBlue
JBLU
$1.88B
| $258K | ﹤0.01% |
13,613
+272
| +2% | +$5.16K |
|
663
NETSCOUT
NTCT
$1.78B
| $258K | ﹤0.01% |
8,695
-6,192
| -42% | -$184K |
|
|
AIMT
664
DELISTED
Aimmune Therapeutics, Inc.
AIMT
| $258K | ﹤0.01% |
9,611
-22,497
| -70% | -$604K |
|
|
RSX
665
DELISTED
VanEck Russia ETF
RSX
| $257K | ﹤0.01% |
+12,140
| New | +$257K |
|
666
ProShares UltraShort Bloomberg Crude Oil
SCO
$124M
| $254K | ﹤0.01% |
854
+514
| +151% | +$153K |
|
|
JOBS
667
DELISTED
51job, Inc.
JOBS
| $254K | ﹤0.01% |
2,610
-5,307
| -67% | -$516K |
|
668
Galicia Financial Group
GGAL
$4.92B
| $253K | ﹤0.01% |
7,673
-4,042
| -35% | -$133K |
|
669
Nokia
NOK
$24.7B
| $251K | ﹤0.01% |
+43,665
| New | +$251K |
|
670
Merck
MRK
$210B
| $250K | ﹤0.01% |
+4,329
| New | +$250K |
|
671
Marsh & McLennan
MMC
$100B
| $249K | ﹤0.01% |
+3,047
| New | +$249K |
|
|
AKAO
672
DELISTED
Achaogen, Inc.
AKAO
| $249K | ﹤0.01% |
+28,755
| New | +$249K |
|
673
Acuity Brands
AYI
$10.3B
| $248K | ﹤0.01% |
+2,144
| New | +$248K |
|
|
MXIM
674
DELISTED
Maxim Integrated Products
MXIM
| $248K | ﹤0.01% |
+4,241
| New | +$248K |
|
675
MasterCraft Boat Holdings
MCFT
$388M
| $247K | ﹤0.01% |
8,550
+2,215
| +35% | +$64K |
|