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 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1001
Chegg
CHGG
$173M
| $67K | ﹤0.01% |
5,461
+2,952
| +118% | +$36.2K |
|
1002
Ducommun
DCO
$1.39B
| $67K | ﹤0.01% |
+2,143
| New | +$67K |
|
1003
Paycom
PAYC
$12.7B
| $67K | ﹤0.01% |
+980
| New | +$67K |
|
1004
Direxion Daily Technology Bear 3x Shares
TECS
$51.6M
| $67K | ﹤0.01% |
+1
| New | +$67K |
|
|
NM
1005
DELISTED
Navios Maritime Holdings Inc.
NM
| $67K | ﹤0.01% |
4,936
+2,424
| +96% | +$32.9K |
|
1006
AllianceBernstein
AB
$4.24B
| $66K | ﹤0.01% |
2,800
-2,678
| -49% | -$63.1K |
|
1007
Booz Allen Hamilton
BAH
$12.8B
| $66K | ﹤0.01% |
2,050
+1,714
| +510% | +$55.2K |
|
1008
Columbus McKinnon
CMCO
$428M
| $66K | ﹤0.01% |
2,616
+2,308
| +749% | +$58.2K |
|
1009
iShares MSCI Canada ETF
EWC
$3.28B
| $66K | ﹤0.01% |
2,487
-2,019
| -45% | -$53.6K |
|
1010
SolarEdge
SEDG
$1.75B
| $66K | ﹤0.01% |
+3,325
| New | +$66K |
|
1011
Telecom Argentina
TEO
$3.2B
| $66K | ﹤0.01% |
+2,631
| New | +$66K |
|
1012
Vanguard Growth ETF
VUG
$189B
| $66K | ﹤0.01% |
525
+490
| +1,400% | +$61.6K |
|
1013
Constellium
CSTM
$2.09B
| $65K | ﹤0.01% |
+9,484
| New | +$65K |
|
1014
Jones Lang LaSalle
JLL
$14.9B
| $65K | ﹤0.01% |
521
-168
| -24% | -$21K |
|
1015
Invesco DB US Dollar Index Bullish Fund
UUP
$161M
| $65K | ﹤0.01% |
2,627
-15,444
| -85% | -$382K |
|
|
EMAN
1016
DELISTED
eMagin Corporation
EMAN
| $65K | ﹤0.01% |
26,853
+21,889
| +441% | +$53K |
|
|
CNCE
1017
DELISTED
Concert Pharmaceuticals, Inc.
CNCE
| $65K | ﹤0.01% |
4,680
+3,217
| +220% | +$44.7K |
|
|
ABMD
1018
DELISTED
Abiomed Inc
ABMD
| $65K | ﹤0.01% |
454
-11,509
| -96% | -$1.65M |
|
1019
Clean Harbors
CLH
$12.8B
| $64K | ﹤0.01% |
+1,153
| New | +$64K |
|
|
ELME
1020
Elme Communities
ELME
$1.51B
| $64K | ﹤0.01% |
2,021
+675
| +50% | +$21.4K |
|
1021
Intrepid Potash
IPI
$388M
| $64K | ﹤0.01% |
+2,860
| New | +$64K |
|
1022
Nektar Therapeutics
NKTR
$898M
| $64K | ﹤0.01% |
221
+188
| +570% | +$54.4K |
|
|
SAFE
1023
Safehold
SAFE
$1.2B
| $64K | ﹤0.01% |
1,102
-810
| -42% | -$47K |
|
|
SCMP
1024
DELISTED
Sucampo Pharmaceuticals, Inc.
SCMP
| $64K | ﹤0.01% |
6,112
+3,155
| +107% | +$33K |
|
1025
Barnes & Noble Education
BNED
$289M
| $63K | ﹤0.01% |
60
+27
| +82% | +$28.4K |
|