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 |
Broadcom
AVGO
|
+$38.5M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.5M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
| 5 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$8.72M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.1M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.9M |
| 4 |
Walt Disney
DIS
|
+$14.5M |
| 5 |
Alibaba
BABA
|
+$13.3M |
Sector Composition
| 1 | Technology | 15.08% |
| 2 | Communication Services | 13.51% |
| 3 | Consumer Discretionary | 9.68% |
| 4 | Healthcare | 8.98% |
| 5 | Financials | 8.3% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
RATE
826
DELISTED
Bankrate Inc
RATE
| $54K | ﹤0.01% |
5,936
+5,219
| +728% | +$47.5K |
|
827
Andersons Inc
ANDE
$1.38B
| $53K | ﹤0.01% |
1,703
-3,786
| -69% | -$118K |
|
|
ANSS
828
DELISTED
Ansys
ANSS
| $53K | ﹤0.01% |
602
-90
| -13% | -$7.92K |
|
829
Ares Capital
ARCC
$15.7B
| $53K | ﹤0.01% |
+3,587
| New | +$53K |
|
830
Zumiez
ZUMZ
$345M
| $52K | ﹤0.01% |
2,628
+1,970
| +299% | +$39K |
|
|
HYLD
831
DELISTED
High Yield ETF
HYLD
| $52K | ﹤0.01% |
+1,648
| New | +$52K |
|
|
MTSN
832
DELISTED
MATTSON TECHNOLOGY INC
MTSN
| $52K | ﹤0.01% |
+14,322
| New | +$52K |
|
833
Bank of New York Mellon
BK
$75B
| $51K | ﹤0.01% |
1,408
-2,824
| -67% | -$102K |
|
834
Esperion Therapeutics
ESPR
$567M
| $51K | ﹤0.01% |
3,048
-8,364
| -73% | -$140K |
|
835
Medallion Financial
MFIN
$245M
| $51K | ﹤0.01% |
5,531
+5,027
| +997% | +$46.4K |
|
836
Service Corp International
SCI
$11.3B
| $51K | ﹤0.01% |
+2,105
| New | +$51K |
|
|
ITCI
837
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $51K | ﹤0.01% |
+1,867
| New | +$51K |
|
|
TSG
838
DELISTED
The Stars Group Inc.
TSG
| $51K | ﹤0.01% |
3,878
+3,838
| +9,595% | +$50.5K |
|
|
KLXI
839
DELISTED
KLX Inc.
KLXI
| $51K | ﹤0.01% |
1,890
+813
| +75% | +$21.9K |
|
|
AFOP
840
DELISTED
ALLIANCE FIBER OPTIC PROD INC COM STK
AFOP
| $51K | ﹤0.01% |
3,501
+1,701
| +95% | +$24.8K |
|
|
AFAM
841
DELISTED
Almost Family Inc
AFAM
| $51K | ﹤0.01% |
1,376
-5,258
| -79% | -$195K |
|
|
ENV
842
DELISTED
ENVESTNET, INC.
ENV
| $51K | ﹤0.01% |
+1,898
| New | +$51K |
|
843
Celldex Therapeutics
CLDX
$1.63B
| $50K | ﹤0.01% |
885
+602
| +213% | +$34K |
|
|
FSP
844
Franklin Street Properties
FSP
$175M
| $50K | ﹤0.01% |
+4,776
| New | +$50K |
|
845
Lindsay Corp
LNN
$1.52B
| $50K | ﹤0.01% |
+710
| New | +$50K |
|
846
ProShares UltraShort Real Estate
SRS
$21.7M
| $50K | ﹤0.01% |
160
-176
| -52% | -$55K |
|
|
WW
847
DELISTED
WW International
WW
| $50K | ﹤0.01% |
3,506
-18,105
| -84% | -$258K |
|
|
PLKI
848
DELISTED
Popeyes Louisiana Kitchen, Inc.
PLKI
| $49K | ﹤0.01% |
+951
| New | +$49K |
|
|
BZUN
849
Baozun
BZUN
$277M
| $49K | ﹤0.01% |
8,531
-46,441
| -84% | -$267K |
|
850
COPT Defense Properties
CDP
$3.45B
| $49K | ﹤0.01% |
1,890
+1,850
| +4,625% | +$48K |
|