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 |
Invesco QQQ Trust
QQQ
|
+$92M |
| 2 |
Walt Disney
DIS
|
+$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$12.8M |
| 4 |
Baidu
BIDU
|
+$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
+$61.4M |
| 2 |
Amazon
AMZN
|
+$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$35.5M |
| 4 |
Apple
AAPL
|
+$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
+$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.01% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
726
Steven Madden
SHOO
$2.2B
| $158K | ﹤0.01% |
4,697
-3,941
| -46% | -$133K |
|
727
ProShares Ultra Russell2000
UWM
$379M
| $158K | ﹤0.01% |
4,712
+3,322
| +239% | +$111K |
|
728
Angi Inc
ANGI
$809M
| $157K | ﹤0.01% |
+1,021
| New | +$157K |
|
729
Alaunos Therapeutics
TCRT
$4.98M
| $157K | ﹤0.01% |
272
+40
| +17% | +$23.1K |
|
730
Corcept Therapeutics
CORT
$7.5B
| $156K | ﹤0.01% |
+13,320
| New | +$156K |
|
731
Medifast
MED
$152M
| $156K | ﹤0.01% |
+1,227
| New | +$156K |
|
732
Schwab US Broad Market ETF
SCHB
$36.4B
| $156K | ﹤0.01% |
13,788
+8,592
| +165% | +$97.2K |
|
733
HealthEquity
HQY
$7.98B
| $155K | ﹤0.01% |
2,097
-20,793
| -91% | -$1.54M |
|
|
DLPH
734
DELISTED
Delphi Technologies PLC Ordinary Shares
DLPH
| $155K | ﹤0.01% |
8,067
+6,023
| +295% | +$116K |
|
|
NLSN
735
DELISTED
Nielsen Holdings plc
NLSN
| $155K | ﹤0.01% |
+6,570
| New | +$155K |
|
736
Diodes
DIOD
$2.46B
| $153K | ﹤0.01% |
4,426
+2,774
| +168% | +$95.9K |
|
737
Halozyme
HALO
$8.84B
| $153K | ﹤0.01% |
9,562
+156
| +2% | +$2.5K |
|
|
DPLO
738
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $153K | ﹤0.01% |
+26,340
| New | +$153K |
|
739
ProShares UltraPro QQQ
TQQQ
$27B
| $152K | ﹤0.01% |
+10,768
| New | +$152K |
|
740
Equinix
EQIX
$75.3B
| $151K | ﹤0.01% |
335
-655
| -66% | -$295K |
|
741
FTI Consulting
FCN
$5.38B
| $150K | ﹤0.01% |
1,956
-976
| -33% | -$74.8K |
|
742
STAAR Surgical
STAA
$1.38B
| $150K | ﹤0.01% |
+4,413
| New | +$150K |
|
|
ECHO
743
DELISTED
Echo Global Logistics, Inc.
ECHO
| $150K | ﹤0.01% |
6,093
+1,693
| +38% | +$41.7K |
|
744
Eversource Energy
ES
$23.8B
| $149K | ﹤0.01% |
2,109
-1,739
| -45% | -$123K |
|
745
ProShares Ultra S&P500
SSO
$7.22B
| $149K | ﹤0.01% |
+5,060
| New | +$149K |
|
746
Healthpeak Properties
DOC
$12.5B
| $148K | ﹤0.01% |
4,754
-18,855
| -80% | -$587K |
|
747
Levi Strauss
LEVI
$8.57B
| $148K | ﹤0.01% |
+6,287
| New | +$148K |
|
748
Alkermes
ALKS
$4.63B
| $147K | ﹤0.01% |
4,030
-8,358
| -67% | -$305K |
|
749
Delta Air Lines
DAL
$39.4B
| $147K | ﹤0.01% |
2,863
-130,126
| -98% | -$6.68M |
|
750
WEC Energy
WEC
$34.6B
| $146K | ﹤0.01% |
+1,848
| New | +$146K |
|