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 |
Invesco QQQ Trust
QQQ
|
+$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$75.9M |
| 3 |
NVIDIA
NVDA
|
+$42.6M |
| 4 |
Netflix
NFLX
|
+$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
+$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$24.3M |
| 5 |
Broadcom
AVGO
|
+$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ENZ
1276
DELISTED
Enzo Biochem, Inc.
ENZ
| $43K | ﹤0.01% |
19,582
+15,027
| +330% | +$33K |
|
|
SIEN
1277
DELISTED
Sientra, Inc.
SIEN
| $43K | ﹤0.01% |
1,116
-796
| -42% | -$30.7K |
|
1278
Catalyst Pharmaceutical
CPRX
$2.48B
| $42K | ﹤0.01% |
9,166
-18,205
| -67% | -$83.4K |
|
1279
Myers Industries
MYE
$612M
| $42K | ﹤0.01% |
2,955
-2,625
| -47% | -$37.3K |
|
1280
INNOVATE Corp
VATE
$66.8M
| $42K | ﹤0.01% |
1,277
-2,090
| -62% | -$68.7K |
|
1281
Vanda Pharmaceuticals
VNDA
$272M
| $42K | ﹤0.01% |
3,724
-14,285
| -79% | -$161K |
|
1282
T-Mobile US
TMUS
$272B
| $41K | ﹤0.01% |
+400
| New | +$41K |
|
1283
Arlo Technologies
ARLO
$1.81B
| $41K | ﹤0.01% |
+16,185
| New | +$41K |
|
1284
Archrock
AROC
$4.36B
| $41K | ﹤0.01% |
6,405
-4,041
| -39% | -$25.9K |
|
1285
Cadence Bank
CADE
$6.96B
| $41K | ﹤0.01% |
1,805
+1,072
| +146% | +$24.4K |
|
1286
Genco Shipping & Trading
GNK
$763M
| $41K | ﹤0.01% |
+6,572
| New | +$41K |
|
1287
Kite Realty
KRG
$5B
| $41K | ﹤0.01% |
+3,586
| New | +$41K |
|
1288
Matsons
MATX
$3.37B
| $41K | ﹤0.01% |
1,438
+1,321
| +1,129% | +$37.7K |
|
1289
Mersana Therapeutics
MRSN
$37.3M
| $41K | ﹤0.01% |
+71
| New | +$41K |
|
1290
Nabors Industries
NBR
$619M
| $41K | ﹤0.01% |
1,134
+747
| +193% | +$27K |
|
1291
Wheaton Precious Metals
WPM
$48.7B
| $41K | ﹤0.01% |
945
-6,248
| -87% | -$271K |
|
|
AUD
1292
DELISTED
Audacy, Inc.
AUD
| $41K | ﹤0.01% |
30,105
+16,091
| +115% | +$21.9K |
|
|
ENDP
1293
DELISTED
Endo International plc
ENDP
| $41K | ﹤0.01% |
+12,121
| New | +$41K |
|
|
GNMK
1294
DELISTED
GenMark Diagnostics, Inc
GNMK
| $41K | ﹤0.01% |
2,831
-50,727
| -95% | -$735K |
|
1295
Abeona Therapeutics
ABEO
$346M
| $40K | ﹤0.01% |
552
+134
| +32% | +$9.71K |
|
1296
NextCure
NXTC
$14.6M
| $40K | ﹤0.01% |
156
+55
| +54% | +$14.1K |
|
|
MN
1297
DELISTED
MANNING & NAPIER, INC.
MN
| $40K | ﹤0.01% |
14,211
+13,247
| +1,374% | +$37.3K |
|
|
ALEX
1298
Alexander & Baldwin
ALEX
$1.37B
| $39K | ﹤0.01% |
3,221
+3,133
| +3,560% | +$37.9K |
|
1299
First Trust NYSE Arca Biotechnology Index Fund
FBT
$1.09B
| $39K | ﹤0.01% |
233
-930
| -80% | -$156K |
|
1300
Liquidity Services
LQDT
$851M
| $39K | ﹤0.01% |
+6,602
| New | +$39K |
|