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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
751
Arrow Electronics
ARW
$6.57B
| $144K | ﹤0.01% |
1,933
-6,953
| -78% | -$518K |
|
752
Helen of Troy
HELE
$553M
| $144K | ﹤0.01% |
919
-216
| -19% | -$33.8K |
|
|
FSCT
753
DELISTED
ForeScout Technologies, Inc. Common Stock
FSCT
| $144K | ﹤0.01% |
3,822
+3,528
| +1,200% | +$133K |
|
754
NGL Energy Partners
NGL
$750M
| $143K | ﹤0.01% |
10,287
-26,915
| -72% | -$374K |
|
755
Saia
SAIA
$8.33B
| $142K | ﹤0.01% |
+1,518
| New | +$142K |
|
|
JE
756
DELISTED
Just Energy Group Inc
JE
| $141K | ﹤0.01% |
1,809
+1,576
| +676% | +$123K |
|
757
Bloomin' Brands
BLMN
$589M
| $140K | ﹤0.01% |
7,417
+2,137
| +40% | +$40.3K |
|
758
ProShares Ultra Energy
DIG
$72.2M
| $140K | ﹤0.01% |
4,740
+1,920
| +68% | +$56.7K |
|
759
Federal Signal
FSS
$7.77B
| $140K | ﹤0.01% |
+4,296
| New | +$140K |
|
760
St. Joe Company
JOE
$2.99B
| $140K | ﹤0.01% |
+8,197
| New | +$140K |
|
761
Comstock Resources
CRK
$4.64B
| $139K | ﹤0.01% |
17,858
+14,775
| +479% | +$115K |
|
762
The Ensign Group
ENSG
$9.77B
| $139K | ﹤0.01% |
+3,144
| New | +$139K |
|
763
iShares Russell 1000 Growth ETF
IWF
$120B
| $139K | ﹤0.01% |
+875
| New | +$139K |
|
764
iShares MBS ETF
MBB
$41.6B
| $139K | ﹤0.01% |
+1,292
| New | +$139K |
|
765
EPAM Systems
EPAM
$8.65B
| $138K | ﹤0.01% |
+759
| New | +$138K |
|
766
GoPro
GPRO
$302M
| $138K | ﹤0.01% |
+26,660
| New | +$138K |
|
|
ONC
767
BeOne Medicines Ltd. American Depositary Shares
ONC
$37B
| $138K | ﹤0.01% |
+1,133
| New | +$138K |
|
768
Globus Medical
GMED
$8.03B
| $137K | ﹤0.01% |
+2,694
| New | +$137K |
|
769
LGI Homes
LGIH
$1.44B
| $137K | ﹤0.01% |
+1,654
| New | +$137K |
|
770
Plexus
PLXS
$3.76B
| $137K | ﹤0.01% |
+2,198
| New | +$137K |
|
|
PRTY
771
DELISTED
Party City Holdco Inc.
PRTY
| $137K | ﹤0.01% |
24,121
+13,400
| +125% | +$76.1K |
|
|
SA
772
Seabridge Gold
SA
$1.85B
| $136K | ﹤0.01% |
+10,772
| New | +$136K |
|
773
Prothena Corp
PRTA
$445M
| $135K | ﹤0.01% |
17,322
-1,147
| -6% | -$8.94K |
|
774
Tenaris
TS
$18.7B
| $134K | ﹤0.01% |
6,361
+4,279
| +206% | +$90.1K |
|
|
GRA
775
DELISTED
W.R. Grace & Co.
GRA
| $134K | ﹤0.01% |
2,014
+740
| +58% | +$49.2K |
|