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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
Funko
FNKO
$185M
| $80K | ﹤0.01% |
6,157
-39,447
| -86% | -$513K |
|
927
POSCO
PKX
$15.5B
| $80K | ﹤0.01% |
1,471
+881
| +149% | +$47.9K |
|
928
Cohen & Steers
CNS
$3.66B
| $79K | ﹤0.01% |
+2,326
| New | +$79K |
|
929
ProShares UltraShort Euro
EUO
$33.6M
| $79K | ﹤0.01% |
3,290
-580
| -15% | -$13.9K |
|
930
Expedia Group
EXPE
$27.4B
| $79K | ﹤0.01% |
+705
| New | +$79K |
|
931
Jazz Pharmaceuticals
JAZZ
$7.79B
| $79K | ﹤0.01% |
+640
| New | +$79K |
|
932
Invesco S&P SmallCap Health Care ETF
PSCH
$144M
| $79K | ﹤0.01% |
+2,223
| New | +$79K |
|
933
Ironwood Pharmaceuticals
IRWD
$201M
| $78K | ﹤0.01% |
9,017
+2,522
| +39% | +$21.8K |
|
934
Mercer International
MERC
$209M
| $78K | ﹤0.01% |
7,520
+6,344
| +539% | +$65.8K |
|
935
Rush Enterprises Class A
RUSHA
$4.48B
| $78K | ﹤0.01% |
5,092
-20,185
| -80% | -$309K |
|
936
Xylem
XYL
$34.5B
| $78K | ﹤0.01% |
1,184
-1,072
| -48% | -$70.6K |
|
|
EGOV
937
DELISTED
NIC Inc
EGOV
| $78K | ﹤0.01% |
6,327
+1,345
| +27% | +$16.6K |
|
|
LXFT
938
DELISTED
Luxoft Holding, Inc.
LXFT
| $78K | ﹤0.01% |
2,581
+2,007
| +350% | +$60.7K |
|
939
Aecom
ACM
$16.9B
| $77K | ﹤0.01% |
2,931
-11,139
| -79% | -$293K |
|
940
Hess Midstream
HESM
$5.21B
| $77K | ﹤0.01% |
4,587
+320
| +7% | +$5.37K |
|
941
Inogen
INGN
$231M
| $77K | ﹤0.01% |
+624
| New | +$77K |
|
|
DISCK
942
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $77K | ﹤0.01% |
+3,351
| New | +$77K |
|
|
FSNN
943
DELISTED
Fusion Connect, Inc. Common Stock
FSNN
| $77K | ﹤0.01% |
46,074
+42,271
| +1,112% | +$70.6K |
|
944
Hanesbrands
HBI
$2.25B
| $76K | ﹤0.01% |
+6,074
| New | +$76K |
|
945
Murphy USA
MUSA
$7.59B
| $76K | ﹤0.01% |
998
-3,057
| -75% | -$233K |
|
946
Starwood Property Trust
STWD
$7.56B
| $76K | ﹤0.01% |
3,879
+345
| +10% | +$6.76K |
|
947
Bristow Group
VTOL
$1.1B
| $76K | ﹤0.01% |
+4,394
| New | +$76K |
|
948
Huntington Bancshares
HBAN
$25.9B
| $75K | ﹤0.01% |
6,340
+2,283
| +56% | +$27K |
|
949
Louisiana-Pacific
LPX
$6.81B
| $75K | ﹤0.01% |
3,390
+596
| +21% | +$13.2K |
|
950
Insight Enterprises
NSIT
$4.07B
| $75K | ﹤0.01% |
+1,857
| New | +$75K |
|