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 |
NVIDIA
NVDA
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
851
Virco
VIRC
$130M
| $248K | ﹤0.01% |
+17,824
| New | +$248K |
|
852
Western Union
WU
$2.74B
| $248K | ﹤0.01% |
20,327
-27,698
| -58% | -$338K |
|
853
DoubleVerify
DV
$2.28B
| $247K | ﹤0.01% |
+12,702
| New | +$247K |
|
854
ProAssurance
PRA
$1.22B
| $247K | ﹤0.01% |
20,285
+3,398
| +20% | +$41.4K |
|
855
USA Compression Partners
USAC
$2.92B
| $246K | ﹤0.01% |
10,399
+7,483
| +257% | +$177K |
|
856
CompoSecure
CMPO
$1.97B
| $245K | ﹤0.01% |
+43,502
| New | +$245K |
|
857
Utilities Select Sector SPDR Fund
XLU
$21.1B
| $244K | ﹤0.01% |
+3,590
| New | +$244K |
|
858
Chegg
CHGG
$173M
| $243K | ﹤0.01% |
76,927
+67,798
| +743% | +$214K |
|
859
Owens Corning
OC
$13.2B
| $242K | ﹤0.01% |
1,397
-2,585
| -65% | -$448K |
|
860
Treace Medical Concepts
TMCI
$470M
| $242K | ﹤0.01% |
36,480
-7,467
| -17% | -$49.5K |
|
861
Day One Biopharmaceuticals
DAWN
$755M
| $240K | ﹤0.01% |
17,425
+14,667
| +532% | +$202K |
|
862
Extreme Networks
EXTR
$3.02B
| $240K | ﹤0.01% |
17,870
+4,050
| +29% | +$54.4K |
|
863
Sigma Lithium
SGML
$604M
| $240K | ﹤0.01% |
20,030
-50,577
| -72% | -$606K |
|
864
Hallador Energy
HNRG
$736M
| $239K | ﹤0.01% |
+30,875
| New | +$239K |
|
865
Albertsons Companies
ACI
$10.5B
| $238K | ﹤0.01% |
12,058
-57,937
| -83% | -$1.14M |
|
|
ITOS
866
DELISTED
iTeos Therapeutics
ITOS
| $238K | ﹤0.01% |
+16,083
| New | +$238K |
|
867
Cal-Maine
CALM
$5.38B
| $236K | ﹤0.01% |
+3,862
| New | +$236K |
|
868
Pinnacle West Capital
PNW
$10.6B
| $236K | ﹤0.01% |
+3,100
| New | +$236K |
|
869
TEGNA Inc
TGNA
$3.38B
| $236K | ﹤0.01% |
+16,999
| New | +$236K |
|
870
FTI Consulting
FCN
$5.4B
| $234K | ﹤0.01% |
1,089
-2,927
| -73% | -$629K |
|
871
Arcos Dorados Holdings
ARCO
$1.49B
| $233K | ﹤0.01% |
25,960
+14,462
| +126% | +$130K |
|
872
Gaotu Techedu
GOTU
$889M
| $233K | ﹤0.01% |
47,695
-22,912
| -32% | -$112K |
|
873
Kirby Corp
KEX
$4.91B
| $232K | ﹤0.01% |
+1,938
| New | +$232K |
|
874
MannKind Corp
MNKD
$1.66B
| $232K | ﹤0.01% |
44,503
+19,630
| +79% | +$102K |
|
875
Galapagos
GLPG
$2.14B
| $227K | ﹤0.01% |
9,178
+8,793
| +2,284% | +$217K |
|