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 |
Gilead Sciences
GILD
|
+$16.8M |
| 2 |
Apple
AAPL
|
+$16.2M |
| 3 |
Booking.com
BKNG
|
+$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$15.3M |
| 5 |
Wells Fargo
WFC
|
+$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
+$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MZOR
901
DELISTED
Mazor Robotics Ltd.
MZOR
| $51K | ﹤0.01% |
+1,981
| New | +$51K |
|
902
Bio-Rad Laboratories Class A
BIO
$7.49B
| $50K | ﹤0.01% |
307
+250
| +439% | +$40.7K |
|
903
BJ's Restaurants
BJRI
$691M
| $50K | ﹤0.01% |
+1,433
| New | +$50K |
|
904
Marathon Petroleum
MPC
$55.2B
| $50K | ﹤0.01% |
1,236
-168,132
| -99% | -$6.8M |
|
905
NETSCOUT
NTCT
$1.8B
| $50K | ﹤0.01% |
1,732
+779
| +82% | +$22.5K |
|
906
NetEase
NTES
$92.3B
| $50K | ﹤0.01% |
+1,045
| New | +$50K |
|
907
Teucrium Soybean Fund
SOYB
$25.2M
| $50K | ﹤0.01% |
2,754
-813
| -23% | -$14.8K |
|
|
SBY
908
DELISTED
Silver Bay Realty Trust Corp.
SBY
| $50K | ﹤0.01% |
2,894
+1,787
| +161% | +$30.9K |
|
909
American Homes 4 Rent
AMH
$12.7B
| $49K | ﹤0.01% |
2,294
-1,908
| -45% | -$40.8K |
|
910
Core Laboratories
CLB
$577M
| $49K | ﹤0.01% |
+439
| New | +$49K |
|
|
IFN
911
India Fund
IFN
$604M
| $49K | ﹤0.01% |
+1,996
| New | +$49K |
|
912
ProShares UltraShort Bloomberg Natural Gas
KOLD
$183M
| $49K | ﹤0.01% |
+138
| New | +$49K |
|
913
Invesco Solar ETF
TAN
$728M
| $49K | ﹤0.01% |
2,440
-1,441
| -37% | -$28.9K |
|
914
Wabash National
WNC
$461M
| $49K | ﹤0.01% |
+3,449
| New | +$49K |
|
|
RRTS
915
DELISTED
RoadRunner Transportation Systems, Inc.
RRTS
| $49K | ﹤0.01% |
247
-38
| -13% | -$7.54K |
|
|
ARLZ
916
DELISTED
Aralez Pharmaceuticals Inc.
ARLZ
| $49K | ﹤0.01% |
10,256
+8,401
| +453% | +$40.1K |
|
917
Equifax
EFX
$30.3B
| $48K | ﹤0.01% |
+359
| New | +$48K |
|
|
SDRL
918
DELISTED
Seadrill Limited Common Stock
SDRL
| $48K | ﹤0.01% |
76
+22
| +41% | +$13.9K |
|
|
TSG
919
DELISTED
The Stars Group Inc.
TSG
| $48K | ﹤0.01% |
2,989
+2,712
| +979% | +$43.6K |
|
|
SVA
920
DELISTED
Sinovac Biotech, Ltd
SVA
| $48K | ﹤0.01% |
8,154
+7,454
| +1,065% | +$43.9K |
|
921
Griffon
GFF
$3.65B
| $47K | ﹤0.01% |
2,793
-30
| -1% | -$505 |
|
922
eHealth
EHTH
$115M
| $46K | ﹤0.01% |
+4,156
| New | +$46K |
|
923
Nektar Therapeutics
NKTR
$916M
| $46K | ﹤0.01% |
182
+113
| +164% | +$28.6K |
|
924
ReposiTrak
TRAK
$306M
| $46K | ﹤0.01% |
+3,964
| New | +$46K |
|
|
CHUY
925
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $46K | ﹤0.01% |
+1,682
| New | +$46K |
|