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 | |
|---|---|---|---|---|---|---|
801
Telefonica
TEF
$30B
| $77K | 0.01% |
+9,864
| New | +$77K |
|
802
Industrial Select Sector SPDR Fund
XLI
$23.2B
| $77K | 0.01% |
1,319
-50,502
| -97% | -$2.95M |
|
803
8x8 Inc
EGHT
$281M
| $76K | 0.01% |
+4,962
| New | +$76K |
|
804
ESCO Technologies
ESE
$5.26B
| $76K | 0.01% |
1,648
+1,455
| +754% | +$67.1K |
|
805
Rockwell Automation
ROK
$38.4B
| $76K | 0.01% |
629
-6,946
| -92% | -$839K |
|
|
SIX
806
DELISTED
Six Flags Entertainment Corp.
SIX
| $76K | 0.01% |
+1,434
| New | +$76K |
|
|
SN
807
DELISTED
Sanchez Energy Corporation
SN
| $76K | 0.01% |
8,656
-3,395
| -28% | -$29.8K |
|
|
HDP
808
DELISTED
Hortonworks, Inc.
HDP
| $76K | 0.01% |
9,191
-8,791
| -49% | -$72.7K |
|
809
Sealed Air
SEE
$4.85B
| $75K | 0.01% |
1,654
+811
| +96% | +$36.8K |
|
810
Amplify Junior Silver Miners ETF
SILJ
$2.17B
| $75K | 0.01% |
4,868
+962
| +25% | +$14.8K |
|
|
HTCH
811
DELISTED
HUTCHINSON TECHNOLOGY INC
HTCH
| $75K | 0.01% |
18,887
-14,107
| -43% | -$56K |
|
812
First Trust Natural Gas ETF
FCG
$329M
| $74K | 0.01% |
2,833
-3,372
| -54% | -$88.1K |
|
813
Openlane
KAR
$3.09B
| $74K | 0.01% |
+4,568
| New | +$74K |
|
|
APIC
814
DELISTED
Apigee Corporation Common Stock
APIC
| $74K | 0.01% |
+4,258
| New | +$74K |
|
|
PDLI
815
DELISTED
PDL BioPharma, Inc.
PDLI
| $74K | 0.01% |
22,131
-7,110
| -24% | -$23.8K |
|
816
Baytex Energy
BTE
$1.78B
| $73K | ﹤0.01% |
17,397
+4,008
| +30% | +$16.8K |
|
817
ProShares Trust UltraShort MSCI EAFE
EFU
$918K
| $73K | ﹤0.01% |
1,051
-8,151
| -89% | -$566K |
|
|
JNP
818
DELISTED
Juniper Pharmaceuticals, Inc. Common Stock
JNP
| $73K | ﹤0.01% |
13,330
+294
| +2% | +$1.61K |
|
819
Arbutus Biopharma
ABUS
$857M
| $72K | ﹤0.01% |
21,138
+14,028
| +197% | +$47.8K |
|
820
Installed Building Products
IBP
$7.2B
| $71K | ﹤0.01% |
1,997
-88
| -4% | -$3.13K |
|
821
Kinross Gold
KGC
$27.8B
| $71K | ﹤0.01% |
+16,980
| New | +$71K |
|
822
Olin
OLN
$2.92B
| $71K | ﹤0.01% |
3,505
-7,744
| -69% | -$157K |
|
823
Cracker Barrel
CBRL
$1.1B
| $69K | ﹤0.01% |
+527
| New | +$69K |
|
824
Clean Harbors
CLH
$12.5B
| $69K | ﹤0.01% |
+1,451
| New | +$69K |
|
825
Pitney Bowes
PBI
$1.95B
| $69K | ﹤0.01% |
3,848
-931
| -19% | -$16.7K |
|