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 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
851
Independent Bank
INDB
$3.5B
| $63K | ﹤0.01% |
+1,395
| New | +$63K |
|
852
iShares US Transportation ETF
IYT
$611M
| $63K | ﹤0.01% |
+1,904
| New | +$63K |
|
|
LKM
853
DELISTED
Link Motion Inc.
LKM
| $63K | ﹤0.01% |
17,150
-186,975
| -92% | -$687K |
|
|
ALJ
854
DELISTED
Alon U S A Energy Inc
ALJ
| $63K | ﹤0.01% |
+9,876
| New | +$63K |
|
|
LSXMA
855
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $62K | ﹤0.01% |
+2,768
| New | +$62K |
|
|
BLOX
856
DELISTED
Infoblox Inc
BLOX
| $62K | ﹤0.01% |
3,349
+3,099
| +1,240% | +$57.4K |
|
857
Helen of Troy
HELE
$566M
| $61K | ﹤0.01% |
+598
| New | +$61K |
|
|
MAG
858
DELISTED
MAG Silver
MAG
| $61K | ﹤0.01% |
4,849
+3,849
| +385% | +$48.4K |
|
|
MBFI
859
DELISTED
MB Financial Corp
MBFI
| $61K | ﹤0.01% |
+1,706
| New | +$61K |
|
860
Lazard
LAZ
$5.35B
| $60K | ﹤0.01% |
2,038
-3,622
| -64% | -$107K |
|
|
NP
861
DELISTED
Neenah, Inc. Common Stock
NP
| $60K | ﹤0.01% |
+832
| New | +$60K |
|
|
TGP
862
DELISTED
Teekay LNG Partners L.P.
TGP
| $60K | ﹤0.01% |
5,372
-4,647
| -46% | -$51.9K |
|
|
ENBL
863
DELISTED
ENABLE MIDSTREAM PARTNERS, LP
ENBL
| $60K | ﹤0.01% |
4,464
+2,174
| +95% | +$29.2K |
|
864
Arcturus Therapeutics
ARCT
$489M
| $59K | ﹤0.01% |
1,878
-825
| -31% | -$25.9K |
|
865
Magnite
MGNI
$3.43B
| $59K | ﹤0.01% |
+4,350
| New | +$59K |
|
866
Silgan Holdings
SLGN
$4.76B
| $59K | ﹤0.01% |
2,314
-5,752
| -71% | -$147K |
|
867
CVR Energy
CVI
$3.19B
| $58K | ﹤0.01% |
3,746
+3,126
| +504% | +$48.4K |
|
868
Equity Lifestyle Properties
ELS
$11.9B
| $58K | ﹤0.01% |
+1,454
| New | +$58K |
|
869
SPDR S&P China ETF
GXC
$503M
| $58K | ﹤0.01% |
+844
| New | +$58K |
|
870
iShares Semiconductor ETF
SOXX
$14B
| $58K | ﹤0.01% |
+1,860
| New | +$58K |
|
|
SAVE
871
DELISTED
Spirit Airlines, Inc.
SAVE
| $58K | ﹤0.01% |
1,312
-1,504
| -53% | -$66.5K |
|
|
LMOS
872
DELISTED
Lumos Networks Corp
LMOS
| $58K | ﹤0.01% |
+4,796
| New | +$58K |
|
|
FM
873
DELISTED
iShares Frontier and Select EM ETF
FM
| $58K | ﹤0.01% |
2,371
-4,794
| -67% | -$117K |
|
874
Chegg
CHGG
$172M
| $57K | ﹤0.01% |
11,404
-3,255
| -22% | -$16.3K |
|
875
Goodyear
GT
$2.45B
| $57K | ﹤0.01% |
2,225
-17,862
| -89% | -$458K |
|