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 | |
|---|---|---|---|---|---|---|
1201
Akebia Therapeutics
AKBA
$756M
| $162K | ﹤0.01% |
48,118
-52,704
| -52% | -$177K |
|
1202
Accuray
ARAY
$187M
| $162K | ﹤0.01% |
32,791
+28,159
| +608% | +$139K |
|
1203
Sutro Biopharma
STRO
$73M
| $162K | ﹤0.01% |
+7,127
| New | +$162K |
|
|
TGB
1204
Taseko Mines
TGB
$1.16B
| $162K | ﹤0.01% |
94,342
+57,102
| +153% | +$98.1K |
|
|
AXU
1205
DELISTED
Alexco Resource Corp.
AXU
| $162K | ﹤0.01% |
+64,674
| New | +$162K |
|
1206
Aldeyra Therapeutics
ALDX
$300M
| $161K | ﹤0.01% |
13,566
-3,181
| -19% | -$37.8K |
|
1207
Artivion
AORT
$1.89B
| $161K | ﹤0.01% |
7,137
-895
| -11% | -$20.2K |
|
1208
Iridium Communications
IRDM
$1.98B
| $161K | ﹤0.01% |
3,913
+1,412
| +56% | +$58.1K |
|
|
CMBT
1209
CMB.TECH NV
CMBT
$2.76B
| $161K | ﹤0.01% |
17,684
+13,215
| +296% | +$120K |
|
|
CZOO
1210
DELISTED
Cazoo Group Ltd
CZOO
| $160K | ﹤0.01% |
+8
| New | +$160K |
|
1211
CEMIG Preferred Shares
CIG
$6.06B
| $159K | ﹤0.01% |
+132,298
| New | +$159K |
|
1212
Direxion Work From Home ETF
WFH
$14.5M
| $159K | ﹤0.01% |
2,336
-25,897
| -92% | -$1.76M |
|
|
NVRO
1213
DELISTED
NEVRO CORP.
NVRO
| $159K | ﹤0.01% |
+1,145
| New | +$159K |
|
1214
Alliance Resource Partners
ARLP
$3.07B
| $158K | ﹤0.01% |
27,304
-16,068
| -37% | -$93K |
|
1215
Honda
HMC
$43.9B
| $158K | ﹤0.01% |
5,239
+262
| +5% | +$7.9K |
|
1216
KALA BIO
KALA
$123M
| $158K | ﹤0.01% |
469
-433
| -48% | -$146K |
|
1217
LGI Homes
LGIH
$1.34B
| $158K | ﹤0.01% |
1,062
+450
| +74% | +$66.9K |
|
1218
Pixelworks
PXLW
$58.4M
| $158K | ﹤0.01% |
3,994
-37
| -0.9% | -$1.46K |
|
1219
SoFi Technologies
SOFI
$33B
| $158K | ﹤0.01% |
9,270
-32,029
| -78% | -$546K |
|
1220
Arlo Technologies
ARLO
$1.91B
| $157K | ﹤0.01% |
25,119
-10,994
| -30% | -$68.7K |
|
1221
Mr. Cooper
COOP
$14B
| $157K | ﹤0.01% |
4,536
-8,201
| -64% | -$284K |
|
1222
Molina Healthcare
MOH
$9.78B
| $157K | ﹤0.01% |
675
+86
| +15% | +$20K |
|
|
DMTK
1223
DELISTED
DermTech, Inc. Common Stock
DMTK
| $157K | ﹤0.01% |
+3,103
| New | +$157K |
|
1224
nLIGHT
LASR
$1.52B
| $156K | ﹤0.01% |
4,820
+3,288
| +215% | +$106K |
|
1225
VanEck Video Gaming and eSports ETF
ESPO
$493M
| $155K | ﹤0.01% |
2,282
-6,668
| -75% | -$453K |
|