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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
801
Great Lakes Dredge & Dock
GLDD
$834M
| $132K | 0.01% |
+28,903
| New | +$132K |
|
802
Golar LNG
GLNG
$4.16B
| $132K | 0.01% |
4,861
-22,613
| -82% | -$614K |
|
803
Northern Trust
NTRS
$24.7B
| $132K | 0.01% |
+1,282
| New | +$132K |
|
804
Smart Sand
SND
$75.5M
| $132K | 0.01% |
+22,786
| New | +$132K |
|
|
CBM
805
DELISTED
Cambrex Corporation
CBM
| $132K | 0.01% |
2,537
-535
| -17% | -$27.8K |
|
|
GHDX
806
DELISTED
Genomic Health, Inc.
GHDX
| $132K | 0.01% |
4,239
+980
| +30% | +$30.5K |
|
807
DNOW Inc
DNOW
$1.65B
| $131K | 0.01% |
+12,820
| New | +$131K |
|
808
Masimo
MASI
$7.94B
| $131K | 0.01% |
1,498
-778
| -34% | -$68K |
|
|
CORR
809
DELISTED
CorEnergy Infrastructure Trust, Inc.
CORR
| $131K | 0.01% |
+3,490
| New | +$131K |
|
|
XLNX
810
DELISTED
Xilinx Inc
XLNX
| $131K | 0.01% |
+1,817
| New | +$131K |
|
811
Global Payments
GPN
$21B
| $130K | 0.01% |
1,173
+314
| +37% | +$34.8K |
|
|
WMGI
812
DELISTED
Wright Medical Group Inc
WMGI
| $130K | 0.01% |
+6,592
| New | +$130K |
|
813
Worthington Enterprises
WOR
$3.26B
| $128K | 0.01% |
+4,864
| New | +$128K |
|
814
Xtrackers Harvest CSI 500 China A-Shares Small Cap ETF
ASHS
$29.1M
| $127K | 0.01% |
3,604
+2,307
| +178% | +$81.3K |
|
815
American Water Works
AWK
$27.2B
| $127K | 0.01% |
1,552
+901
| +138% | +$73.7K |
|
816
Kinross Gold
KGC
$28.3B
| $127K | 0.01% |
32,230
+21,806
| +209% | +$85.9K |
|
|
SVVC
817
DELISTED
Firsthand Technology Value Fund, Inc. Common Stock
SVVC
| $127K | 0.01% |
11,293
+8,419
| +293% | +$94.7K |
|
818
Regenxbio
RGNX
$479M
| $126K | 0.01% |
4,252
-3,125
| -42% | -$92.6K |
|
819
Sandstorm Gold
SAND
$3.44B
| $126K | 0.01% |
26,472
+8,008
| +43% | +$38.1K |
|
820
TC Energy
TRP
$54.2B
| $126K | 0.01% |
+3,070
| New | +$126K |
|
821
iShares US Technology ETF
IYW
$23.9B
| $125K | 0.01% |
+2,992
| New | +$125K |
|
|
ONC
822
BeOne Medicines Ltd. American Depositary Shares
ONC
$36.9B
| $125K | 0.01% |
746
-763
| -51% | -$128K |
|
823
Saia
SAIA
$8.41B
| $124K | 0.01% |
+1,656
| New | +$124K |
|
|
TARO
824
DELISTED
Taro Pharmaceutical Industries Ltd.
TARO
| $124K | 0.01% |
+1,259
| New | +$124K |
|
825
AES
AES
$9.15B
| $123K | 0.01% |
10,848
-12,225
| -53% | -$139K |
|