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 | |
|---|---|---|---|---|---|---|
651
VanEck Brazil Small-Cap ETF
BRF
$21.4M
| $191K | ﹤0.01% |
8,240
+1,625
| +25% | +$37.7K |
|
652
Principal Financial Group
PFG
$17.8B
| $191K | ﹤0.01% |
3,343
-5,042
| -60% | -$288K |
|
653
Scholastic
SCHL
$660M
| $191K | ﹤0.01% |
+5,078
| New | +$191K |
|
|
EBSB
654
DELISTED
Meridian Bancorp, Inc.
EBSB
| $191K | ﹤0.01% |
+10,236
| New | +$191K |
|
655
Teucrium Soybean Fund
SOYB
$25.2M
| $190K | ﹤0.01% |
12,294
-4,098
| -25% | -$63.3K |
|
656
Premier
PINC
$2.21B
| $188K | ﹤0.01% |
6,516
+3,847
| +144% | +$111K |
|
657
Dine Brands
DIN
$361M
| $187K | ﹤0.01% |
+2,471
| New | +$187K |
|
658
iShares MSCI Spain ETF
EWP
$1.38B
| $186K | ﹤0.01% |
6,686
+430
| +7% | +$12K |
|
659
Parker-Hannifin
PH
$96.9B
| $186K | ﹤0.01% |
1,035
-19
| -2% | -$3.41K |
|
660
SM Energy
SM
$3.14B
| $186K | ﹤0.01% |
19,257
+10,394
| +117% | +$100K |
|
|
VSI
661
DELISTED
Vitamin Shoppe Inc.
VSI
| $186K | ﹤0.01% |
28,561
-40,475
| -59% | -$264K |
|
662
RCI Hospitality Holdings
RICK
$295M
| $185K | ﹤0.01% |
+8,982
| New | +$185K |
|
663
argenx
ARGX
$46.7B
| $182K | ﹤0.01% |
+1,604
| New | +$182K |
|
|
LONE
664
DELISTED
Lonestar Resources US Inc. Class A Common Stock
LONE
| $182K | ﹤0.01% |
66,934
+18,204
| +37% | +$49.5K |
|
|
WUBA
665
DELISTED
58.COM INC
WUBA
| $182K | ﹤0.01% |
+3,704
| New | +$182K |
|
|
SAVE
666
DELISTED
Spirit Airlines, Inc.
SAVE
| $181K | ﹤0.01% |
4,998
+4,301
| +617% | +$156K |
|
|
PXD
667
DELISTED
Pioneer Natural Resource Co.
PXD
| $181K | ﹤0.01% |
1,444
-883
| -38% | -$111K |
|
668
Howard Hughes
HHH
$4.68B
| $180K | ﹤0.01% |
+1,457
| New | +$180K |
|
669
Rambus
RMBS
$8.3B
| $180K | ﹤0.01% |
13,785
+6,417
| +87% | +$83.8K |
|
|
SIEN
670
DELISTED
Sientra, Inc.
SIEN
| $180K | ﹤0.01% |
2,792
+2,308
| +477% | +$149K |
|
|
MGLN
671
DELISTED
Magellan Health Services, Inc.
MGLN
| $180K | ﹤0.01% |
2,904
-1,193
| -29% | -$73.9K |
|
672
Inogen
INGN
$225M
| $178K | ﹤0.01% |
3,726
+2,508
| +206% | +$120K |
|
673
Tronox
TROX
$755M
| $178K | ﹤0.01% |
21,521
+9,717
| +82% | +$80.4K |
|
674
HP
HPQ
$26.5B
| $177K | ﹤0.01% |
9,356
+9,150
| +4,442% | +$173K |
|
675
Paysign
PAYS
$281M
| $177K | ﹤0.01% |
17,572
-57,961
| -77% | -$584K |
|