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 | |
|---|---|---|---|---|---|---|
|
DMYD
976
DELISTED
dMY Technology Group, Inc. II
DMYD
| $252K | ﹤0.01% |
+17,173
| New | +$252K |
|
|
XIFR
977
XPLR Infrastructure, LP
XIFR
$919M
| $251K | ﹤0.01% |
3,450
+541
| +19% | +$39.4K |
|
|
TRHC
978
DELISTED
Tabula Rasa HealthCare, Inc. Common Stock
TRHC
| $251K | ﹤0.01% |
+5,451
| New | +$251K |
|
|
TYME
979
DELISTED
Tyme Technologies, Inc. Common Stock
TYME
| $251K | ﹤0.01% |
141,022
+138,685
| +5,934% | +$247K |
|
980
Alpha Pro Tech
APT
$50.7M
| $250K | ﹤0.01% |
25,682
+24,641
| +2,367% | +$240K |
|
|
DOC
981
DELISTED
PHYSICIANS REALTY TRUST
DOC
| $250K | ﹤0.01% |
14,154
-7,236
| -34% | -$128K |
|
982
Banco Macro
BMA
$3.03B
| $249K | ﹤0.01% |
+18,716
| New | +$249K |
|
983
Rimini Street
RMNI
$414M
| $249K | ﹤0.01% |
27,780
+27,353
| +6,406% | +$245K |
|
984
SPDR Portfolio S&P 500 Growth ETF
SPYG
$41.4B
| $249K | ﹤0.01% |
+4,426
| New | +$249K |
|
|
HA
985
DELISTED
Hawaiian Holdings, Inc.
HA
| $249K | ﹤0.01% |
9,348
-34,445
| -79% | -$918K |
|
986
Crane NXT
CXT
$3.49B
| $248K | ﹤0.01% |
7,624
+4,926
| +183% | +$160K |
|
987
Direxion Daily S&P Biotech Bear 3X Shares
LABD
$73M
| $248K | ﹤0.01% |
+11,426
| New | +$248K |
|
988
Smith Micro Software
SMSI
$15.3M
| $248K | ﹤0.01% |
5,644
+1,440
| +34% | +$63.3K |
|
|
MSB
989
Mesabi Trust
MSB
$414M
| $247K | ﹤0.01% |
+8,218
| New | +$247K |
|
|
VXRT
990
DELISTED
Vaxart
VXRT
| $247K | ﹤0.01% |
+40,967
| New | +$247K |
|
|
RUBY
991
DELISTED
Rubius Therapeutics, Inc
RUBY
| $247K | ﹤0.01% |
+9,345
| New | +$247K |
|
992
Empire State Realty Trust
ESRT
$1.3B
| $244K | ﹤0.01% |
21,965
+9,461
| +76% | +$105K |
|
993
First Trust Natural Gas ETF
FCG
$334M
| $244K | ﹤0.01% |
19,088
+15,100
| +379% | +$193K |
|
994
Liberty Energy
LBRT
$1.76B
| $244K | ﹤0.01% |
21,690
+20,851
| +2,485% | +$235K |
|
995
Xcel Energy
XEL
$42.8B
| $244K | ﹤0.01% |
+3,671
| New | +$244K |
|
996
Ambac
AMBC
$415M
| $243K | ﹤0.01% |
14,517
-8,249
| -36% | -$138K |
|
997
TopBuild
BLD
$11.8B
| $243K | ﹤0.01% |
1,161
-1,623
| -58% | -$340K |
|
998
Cartesian Therapeutics
RNAC
$255M
| $243K | ﹤0.01% |
1,793
+1,437
| +404% | +$195K |
|
|
NGM
999
DELISTED
NGM Biopharmaceuticals, Inc. Common Stock
NGM
| $243K | ﹤0.01% |
+8,374
| New | +$243K |
|
1000
Citi Trends
CTRN
$286M
| $242K | ﹤0.01% |
2,898
+2,436
| +527% | +$203K |
|