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 | |
|---|---|---|---|---|---|---|
226
iShares MSCI Taiwan ETF
EWT
$6.16B
| $1.84M | ﹤0.01% |
30,636
-13,847
| -31% | -$830K |
|
227
Axalta
AXTA
$6.76B
| $1.84M | ﹤0.01% |
62,037
+43,650
| +237% | +$1.29M |
|
228
Cedar Fair
FUN
$2.59B
| $1.81M | ﹤0.01% |
36,443
-23,714
| -39% | -$1.18M |
|
229
VanEck Oil Services ETF
OIH
$890M
| $1.81M | ﹤0.01% |
9,466
-5,606
| -37% | -$1.07M |
|
230
First Solar
FSLR
$21.7B
| $1.8M | ﹤0.01% |
20,622
+12,948
| +169% | +$1.13M |
|
231
Snap-on
SNA
$17.1B
| $1.8M | ﹤0.01% |
7,803
+6,035
| +341% | +$1.39M |
|
232
EPR Properties
EPR
$4.05B
| $1.8M | ﹤0.01% |
38,613
+15,009
| +64% | +$699K |
|
233
PG&E
PCG
$33.5B
| $1.8M | ﹤0.01% |
153,458
-158,730
| -51% | -$1.86M |
|
234
iShares MSCI USA Momentum Factor ETF
MTUM
$18.2B
| $1.79M | ﹤0.01% |
11,128
+10,255
| +1,175% | +$1.65M |
|
235
Skillz
SKLZ
$111M
| $1.78M | ﹤0.01% |
4,668
+4,079
| +693% | +$1.55M |
|
|
HZON
236
DELISTED
Horizon Acquisition Corporation II
HZON
| $1.78M | ﹤0.01% |
+174,070
| New | +$1.78M |
|
237
Steel Dynamics
STLD
$19.3B
| $1.77M | ﹤0.01% |
+34,965
| New | +$1.77M |
|
238
GoDaddy
GDDY
$20.1B
| $1.76M | ﹤0.01% |
22,639
+3,376
| +18% | +$262K |
|
239
nCino
NCNO
$3.53B
| $1.75M | ﹤0.01% |
26,221
+25,089
| +2,216% | +$1.67M |
|
240
Martin Marietta Materials
MLM
$37.3B
| $1.75M | ﹤0.01% |
5,206
+1,516
| +41% | +$509K |
|
241
Fastenal
FAST
$57.7B
| $1.74M | ﹤0.01% |
+69,250
| New | +$1.74M |
|
242
The Beachbody Company, Inc. Class A Common Stock
BODI
$40.7M
| $1.72M | ﹤0.01% |
+3,405
| New | +$1.72M |
|
|
RDS.B
243
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $1.72M | ﹤0.01% |
46,690
-27,533
| -37% | -$1.01M |
|
244
Gaotu Techedu
GOTU
$894M
| $1.72M | ﹤0.01% |
+50,641
| New | +$1.72M |
|
245
Alcoa
AA
$8.1B
| $1.71M | ﹤0.01% |
52,552
+19,450
| +59% | +$632K |
|
246
Public Storage
PSA
$51.3B
| $1.7M | ﹤0.01% |
+6,899
| New | +$1.7M |
|
247
BioMarin Pharmaceuticals
BMRN
$10.9B
| $1.7M | ﹤0.01% |
22,524
+22,424
| +22,424% | +$1.69M |
|
248
Hershey
HSY
$37.6B
| $1.69M | ﹤0.01% |
10,711
+1,343
| +14% | +$212K |
|
|
DM
249
DELISTED
Desktop Metal, Inc.
DM
| $1.69M | ﹤0.01% |
11,369
+5,515
| +94% | +$822K |
|
|
AYX
250
DELISTED
Alteryx, Inc.
AYX
| $1.69M | ﹤0.01% |
20,401
+12,795
| +168% | +$1.06M |
|