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 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
726
Globus Medical
GMED
$7.89B
| $159K | 0.01% |
4,798
-9,034
| -65% | -$299K |
|
|
ATRS
727
DELISTED
Antares Pharma, Inc.
ATRS
| $159K | 0.01% |
+49,631
| New | +$159K |
|
728
PBF Energy
PBF
$3.26B
| $158K | 0.01% |
7,112
+7,069
| +16,440% | +$157K |
|
729
ZTO Express
ZTO
$15.4B
| $158K | 0.01% |
+11,348
| New | +$158K |
|
|
WPX
730
DELISTED
WPX Energy, Inc.
WPX
| $158K | 0.01% |
16,440
-20,436
| -55% | -$196K |
|
731
Grand Canyon Education
LOPE
$5.69B
| $157K | 0.01% |
2,015
-2,571
| -56% | -$200K |
|
732
Mercer International
MERC
$204M
| $157K | 0.01% |
13,662
+11,712
| +601% | +$135K |
|
733
Ambac
AMBC
$415M
| $155K | 0.01% |
8,982
-18,561
| -67% | -$320K |
|
734
Pembina Pipeline
PBA
$22.5B
| $155K | 0.01% |
+4,690
| New | +$155K |
|
735
Gibraltar Industries
ROCK
$1.79B
| $155K | 0.01% |
4,350
+1,724
| +66% | +$61.4K |
|
736
WPP
WPP
$5.8B
| $155K | 0.01% |
1,473
+525
| +55% | +$55.2K |
|
|
DQ
737
Daqo New Energy
DQ
$1.77B
| $153K | 0.01% |
37,025
+35,500
| +2,328% | +$147K |
|
738
PACCAR
PCAR
$51.8B
| $153K | 0.01% |
+3,486
| New | +$153K |
|
739
Global X Uranium ETF
URA
$4.31B
| $153K | 0.01% |
11,648
+9,771
| +521% | +$128K |
|
740
USA Compression Partners
USAC
$2.84B
| $153K | 0.01% |
9,402
+1,610
| +21% | +$26.2K |
|
|
LGF.A
741
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $153K | 0.01% |
5,454
-1,761
| -24% | -$49.4K |
|
|
MACK
742
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $153K | 0.01% |
15,765
+10,630
| +207% | +$103K |
|
|
ELGX
743
DELISTED
Endologix Inc
ELGX
| $152K | 0.01% |
3,139
+3,009
| +2,315% | +$146K |
|
|
EBIX
744
DELISTED
Ebix Inc
EBIX
| $152K | 0.01% |
2,836
-13,907
| -83% | -$745K |
|
|
ENV
745
DELISTED
ENVESTNET, INC.
ENV
| $152K | 0.01% |
3,847
-4,685
| -55% | -$185K |
|
|
RVNC
746
DELISTED
Revance Therapeutics, Inc.
RVNC
| $150K | 0.01% |
5,686
-1,865
| -25% | -$49.2K |
|
|
SRC
747
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $150K | 0.01% |
4,524
+3,596
| +388% | +$119K |
|
|
HZN
748
DELISTED
Horizon Global Corporation
HZN
| $150K | 0.01% |
+10,454
| New | +$150K |
|
749
Pan American Silver
PAAS
$15.3B
| $149K | 0.01% |
8,893
-2,823
| -24% | -$47.3K |
|
750
Carlyle Group
CG
$23.7B
| $148K | 0.01% |
7,497
+1,988
| +36% | +$39.2K |
|