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 | |
|---|---|---|---|---|---|---|
826
BlueLinx
BXC
$624M
| $362K | ﹤0.01% |
+9,240
| New | +$362K |
|
|
TXNM
827
TXNM Energy, Inc.
TXNM
$6.01B
| $362K | ﹤0.01% |
7,389
+2,973
| +67% | +$146K |
|
828
Carisma Therapeutics
CARM
$16.5M
| $360K | ﹤0.01% |
6,934
+4,539
| +190% | +$236K |
|
829
Xenon Pharmaceuticals
XENE
$2.87B
| $360K | ﹤0.01% |
+20,142
| New | +$360K |
|
|
EXK
830
Endeavour Silver
EXK
$1.71B
| $359K | ﹤0.01% |
72,488
+51,636
| +248% | +$256K |
|
831
Matsons
MATX
$3.26B
| $359K | ﹤0.01% |
5,396
+3,771
| +232% | +$251K |
|
832
Methanex
MEOH
$2.98B
| $359K | ﹤0.01% |
9,764
+5,097
| +109% | +$187K |
|
|
NPTN
833
DELISTED
NEOPHOTONICS CORP
NPTN
| $359K | ﹤0.01% |
30,088
+9,453
| +46% | +$113K |
|
|
SFT
834
DELISTED
Shift Technologies, Inc. Class A Common Stock
SFT
| $355K | ﹤0.01% |
4,273
+2,403
| +129% | +$200K |
|
|
COWN
835
DELISTED
Cowen Inc. Class A Common Stock
COWN
| $355K | ﹤0.01% |
+10,105
| New | +$355K |
|
836
GoHealth
GOCO
$76.9M
| $354K | ﹤0.01% |
2,019
+1,426
| +240% | +$250K |
|
837
Teleflex
TFX
$5.74B
| $353K | ﹤0.01% |
851
-98
| -10% | -$40.7K |
|
838
Aclaris Therapeutics
ACRS
$222M
| $352K | ﹤0.01% |
13,973
+10,076
| +259% | +$254K |
|
839
Denison Mines
DNN
$2.17B
| $352K | ﹤0.01% |
+323,241
| New | +$352K |
|
840
Sturm, Ruger & Co
RGR
$588M
| $352K | ﹤0.01% |
+5,332
| New | +$352K |
|
841
Carrier Global
CARR
$52.9B
| $351K | ﹤0.01% |
8,314
+3,695
| +80% | +$156K |
|
842
Ventas
VTR
$31.5B
| $351K | ﹤0.01% |
6,594
-51,329
| -89% | -$2.73M |
|
|
TBA
843
DELISTED
Thoma Bravo Advantage
TBA
| $351K | ﹤0.01% |
+33,605
| New | +$351K |
|
|
BOWX
844
DELISTED
BowX Acquisition Corp. Class A Common Stock
BOWX
| $347K | ﹤0.01% |
+29,774
| New | +$347K |
|
845
Aterian
ATER
$9.54M
| $346K | ﹤0.01% |
+979
| New | +$346K |
|
846
DXC Technology
DXC
$2.55B
| $346K | ﹤0.01% |
11,074
-23,723
| -68% | -$741K |
|
847
Genprex
GNPX
$8.02M
| $346K | ﹤0.01% |
2,009
+474
| +31% | +$81.6K |
|
848
abrdn Physical Gold Shares ETF
SGOL
$5.8B
| $344K | ﹤0.01% |
21,020
-3,083
| -13% | -$50.5K |
|
849
Vital Energy
VTLE
$641M
| $344K | ﹤0.01% |
11,463
-5,109
| -31% | -$153K |
|
850
Elanco Animal Health
ELAN
$9.19B
| $343K | ﹤0.01% |
+11,672
| New | +$343K |
|