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 | |
|---|---|---|---|---|---|---|
|
SAGE
676
DELISTED
Sage Therapeutics
SAGE
| $727K | ﹤0.01% |
12,679
+8
| +0.1% | +$459 |
|
677
Vermilion Energy
VET
$1.13B
| $727K | ﹤0.01% |
80,282
| – | – |
|
678
Amplify Transformational Data Sharing ETF
BLOK
$1.18B
| $722K | ﹤0.01% |
15,347
| – | – |
|
679
Star Bulk Carriers
SBLK
$2.22B
| $722K | ﹤0.01% |
33,819
-2,405
| -7% | -$51.3K |
|
680
Clarivate
CLVT
$3.01B
| $719K | ﹤0.01% |
26,670
| – | – |
|
681
EchoStar
SATS
$23.2B
| $718K | ﹤0.01% |
29,333
-400
| -1% | -$9.79K |
|
682
Sonos
SONO
$1.78B
| $717K | ﹤0.01% |
20,113
-2,295
| -10% | -$81.8K |
|
683
Direxion Daily S&P Biotech Bull 3X Shares
LABU
$745M
| $716K | ﹤0.01% |
457
+97
| +27% | +$152K |
|
|
RDFN
684
DELISTED
Redfin
RDFN
| $714K | ﹤0.01% |
11,069
-1,800
| -14% | -$116K |
|
685
iShares US Aerospace & Defense ETF
ITA
$9.28B
| $713K | ﹤0.01% |
6,486
| – | – |
|
686
Alkermes
ALKS
$4.7B
| $712K | ﹤0.01% |
28,597
+3,894
| +16% | +$97K |
|
687
ARK Innovation ETF
ARKK
$7.57B
| $711K | ﹤0.01% |
5,511
| – | – |
|
688
CMS Energy
CMS
$21.2B
| $711K | ﹤0.01% |
11,838
+495
| +4% | +$29.7K |
|
689
iShares US Technology ETF
IYW
$23.2B
| $710K | ﹤0.01% |
7,141
| – | – |
|
690
Transmedics
TMDX
$3.6B
| $708K | ﹤0.01% |
20,850
+500
| +2% | +$17K |
|
691
Invesco Leisure and Entertainment ETF
PEJ
$364M
| $707K | ﹤0.01% |
13,506
| – | – |
|
692
Axsome Therapeutics
AXSM
$6.45B
| $705K | ﹤0.01% |
10,335
-200
| -2% | -$13.6K |
|
693
Chord Energy
CHRD
$5.9B
| $705K | ﹤0.01% |
6,613
+1,611
| +32% | +$172K |
|
694
Newell Brands
NWL
$2.65B
| $705K | ﹤0.01% |
25,710
-1,355
| -5% | -$37.2K |
|
695
Cinemark Holdings
CNK
$3.16B
| $704K | ﹤0.01% |
31,979
+5
| +0% | +$110 |
|
696
Invesco DB Agriculture Fund
DBA
$807M
| $702K | ﹤0.01% |
38,020
-22,261
| -37% | -$411K |
|
697
PPL Corp
PPL
$26.4B
| $702K | ﹤0.01% |
24,853
+6,188
| +33% | +$175K |
|
698
Starwood Property Trust
STWD
$7.53B
| $697K | ﹤0.01% |
26,394
+180
| +0.7% | +$4.75K |
|
699
Toronto Dominion Bank
TD
$128B
| $697K | ﹤0.01% |
9,856
| – | – |
|
700
Coty
COTY
$3.77B
| $693K | ﹤0.01% |
74,482
+7,971
| +12% | +$74.2K |
|