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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
API
801
Agora
API
$328M
| $382K | ﹤0.01% |
7,618
-23,355
| -75% | -$1.17M |
|
|
CBD
802
DELISTED
Companhia Brasileira de Distribuicao
CBD
| $382K | ﹤0.01% |
65,727
+7,631
| +13% | +$44.4K |
|
|
SHLX
803
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $381K | ﹤0.01% |
28,573
+9,012
| +46% | +$120K |
|
804
iShares MSCI South Africa ETF
EZA
$431M
| $380K | ﹤0.01% |
7,706
-347
| -4% | -$17.1K |
|
|
LTRPA
805
DELISTED
Liberty TripAdvisor Holdings, Inc. Series A
LTRPA
| $380K | ﹤0.01% |
+59,702
| New | +$380K |
|
806
HealthEquity
HQY
$8.01B
| $379K | ﹤0.01% |
5,585
-578
| -9% | -$39.2K |
|
807
Reinsurance Group of America
RGA
$12.7B
| $379K | ﹤0.01% |
+3,014
| New | +$379K |
|
|
LHCG
808
DELISTED
LHC Group LLC
LHCG
| $379K | ﹤0.01% |
+1,985
| New | +$379K |
|
809
Skillsoft
SKIL
$129M
| $377K | ﹤0.01% |
1,888
-11,138
| -86% | -$2.22M |
|
|
CHNG
810
DELISTED
Change Healthcare Inc. Common Stock
CHNG
| $377K | ﹤0.01% |
+17,087
| New | +$377K |
|
811
Omnicom Group
OMC
$15.1B
| $376K | ﹤0.01% |
5,077
+2,395
| +89% | +$177K |
|
812
iShares MSCI Singapore ETF
EWS
$805M
| $375K | ﹤0.01% |
16,017
-78,975
| -83% | -$1.85M |
|
813
Ziff Davis
ZD
$1.58B
| $375K | ﹤0.01% |
+3,604
| New | +$375K |
|
|
PRTY
814
DELISTED
Party City Holdco Inc.
PRTY
| $375K | ﹤0.01% |
64,800
+60,200
| +1,309% | +$348K |
|
815
Safe Bulkers
SB
$462M
| $374K | ﹤0.01% |
+153,006
| New | +$374K |
|
|
ARD
816
DELISTED
Ardagh Group S.A. Class A Common Shares
ARD
| $374K | ﹤0.01% |
+14,721
| New | +$374K |
|
817
Kimco Realty
KIM
$15.3B
| $373K | ﹤0.01% |
19,898
+113
| +0.6% | +$2.12K |
|
|
GBT
818
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $371K | ﹤0.01% |
9,123
-49,137
| -84% | -$2M |
|
819
Sundial Growers
SNDL
$623M
| $370K | ﹤0.01% |
32,744
+7,909
| +32% | +$89.4K |
|
820
iShares US Telecommunications ETF
IYZ
$603M
| $369K | ﹤0.01% |
11,432
+4,870
| +74% | +$157K |
|
821
Ovid Therapeutics
OVID
$88.2M
| $369K | ﹤0.01% |
91,818
+54,868
| +148% | +$221K |
|
822
Future FinTech Group
FTFT
$9.01M
| $367K | ﹤0.01% |
+1,186
| New | +$367K |
|
|
NIU
823
Niu Technologies
NIU
$336M
| $366K | ﹤0.01% |
+10,006
| New | +$366K |
|
824
Ciena
CIEN
$17.3B
| $365K | ﹤0.01% |
+6,681
| New | +$365K |
|
825
Adaptive Biotechnologies
ADPT
$1.91B
| $364K | ﹤0.01% |
+9,059
| New | +$364K |
|