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 |
Advanced Micro Devices
AMD
|
+$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
+$10.1M |
| 3 |
NIO
NIO
|
+$7.66M |
| 4 |
Alibaba
BABA
|
+$7.54M |
| 5 |
Micron Technology
MU
|
+$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$101M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.2M |
| 3 |
Amazon
AMZN
|
+$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
+$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
Stitch Fix
SFIX
$749M
| $418K | ﹤0.01% |
6,648
+1,571
| +31% | +$98.8K |
|
|
SVM
927
Silvercorp Metals
SVM
$1.08B
| $418K | ﹤0.01% |
76,540
+100
| +0.1% | +$546 |
|
928
IAC Inc
IAC
$2.84B
| $417K | ﹤0.01% |
3,312
| – | – |
|
929
Siren ETF Trust Siren Nasdaq NexGen Economy ETF
BLCN
$47M
| $416K | ﹤0.01% |
8,783
| – | – |
|
930
Amicus Therapeutics
FOLD
$2.43B
| $416K | ﹤0.01% |
42,122
+12,450
| +42% | +$123K |
|
931
CRH
CRH
$74.5B
| $415K | ﹤0.01% |
8,136
| – | – |
|
932
WideOpenWest
WOW
$440M
| $414K | ﹤0.01% |
19,178
+41
| +0.2% | +$885 |
|
933
Travel + Leisure Co
TNL
$4.02B
| $412K | ﹤0.01% |
6,824
-2
| -0% | -$121 |
|
934
WEC Energy
WEC
$35.1B
| $412K | ﹤0.01% |
4,577
+200
| +5% | +$18K |
|
935
Financial Select Sector SPDR Fund
XLF
$53.9B
| $412K | ﹤0.01% |
11,163
-6,238
| -36% | -$230K |
|
936
Atlanta Braves Holdings Series B
BATRK
$2.63B
| $411K | ﹤0.01% |
14,844
-700
| -5% | -$19.4K |
|
937
Medifast
MED
$152M
| $411K | ﹤0.01% |
1,438
-200
| -12% | -$57.2K |
|
938
Purple Innovation
PRPL
$117M
| $411K | ﹤0.01% |
14,767
-700
| -5% | -$19.5K |
|
939
Invesco DB Oil Fund
DBO
$229M
| $410K | ﹤0.01% |
31,469
| – | – |
|
940
Novartis
NVS
$245B
| $410K | ﹤0.01% |
4,475
| – | – |
|
941
Tiptree Inc
TIPT
$858M
| $410K | ﹤0.01% |
43,291
| – | – |
|
942
Emergent Biosolutions
EBS
$433M
| $407K | ﹤0.01% |
6,368
+1
| +0% | +$64 |
|
|
GPP
943
DELISTED
Green Plains Partners LP
GPP
| $405K | ﹤0.01% |
32,903
| – | – |
|
944
ARK Space Exploration & Innovation ETF
ARKX
$399M
| $404K | ﹤0.01% |
19,270
| – | – |
|
945
SPDR Portfolio S&P 500 Growth ETF
SPYG
$41.6B
| $401K | ﹤0.01% |
6,347
-1
| -0% | -$63 |
|
946
Telefonica
TEF
$30.1B
| $401K | ﹤0.01% |
91,475
| – | – |
|
|
VXRT
947
DELISTED
Vaxart
VXRT
| $401K | ﹤0.01% |
52,278
+8,612
| +20% | +$66.1K |
|
948
Aspen Aerogels
ASPN
$538M
| $400K | ﹤0.01% |
11,568
+1
| +0% | +$35 |
|
|
SOL
949
Emeren Group
SOL
$96.5M
| $400K | ﹤0.01% |
44,177
-13,670
| -24% | -$124K |
|
950
WillScot Mobile Mini Holdings
WSC
$4.17B
| $400K | ﹤0.01% |
14,456
-100
| -0.7% | -$2.77K |
|