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 |
NVIDIA
NVDA
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1226
United Microelectronic
UMC
$17B
| $77K | ﹤0.01% |
+8,886
| New | +$77K |
|
1227
Wrap Technologies
WRAP
$104M
| $77K | ﹤0.01% |
+38,802
| New | +$77K |
|
1228
DMC Global
BOOM
$145M
| $76K | ﹤0.01% |
5,338
+2,174
| +69% | +$31K |
|
1229
Bioventus
BVS
$484M
| $76K | ﹤0.01% |
13,383
+12,105
| +947% | +$68.7K |
|
1230
Establishment Labs
ESTA
$1.09B
| $76K | ﹤0.01% |
1,685
-25,086
| -94% | -$1.13M |
|
1231
Direxion Daily Utilities Bull 3X Shares
UTSL
$30.8M
| $76K | ﹤0.01% |
3,089
-822
| -21% | -$20.2K |
|
|
MRNS
1232
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $76K | ﹤0.01% |
65,041
-27,230
| -30% | -$31.8K |
|
1233
Donaldson
DCI
$9.42B
| $75K | ﹤0.01% |
+1,059
| New | +$75K |
|
1234
Tilly's
TLYS
$57.3M
| $75K | ﹤0.01% |
+12,551
| New | +$75K |
|
1235
VirTra
VTSI
$62.9M
| $75K | ﹤0.01% |
9,863
-31,381
| -76% | -$239K |
|
1236
HUB Group
HUBG
$2.2B
| $74K | ﹤0.01% |
1,724
-4,508
| -72% | -$193K |
|
1237
iHeartMedia
IHRT
$389M
| $74K | ﹤0.01% |
67,943
+25,371
| +60% | +$27.6K |
|
1238
Kinsale Capital Group
KNSL
$10.1B
| $74K | ﹤0.01% |
+193
| New | +$74K |
|
1239
Sagimet Biosciences
SGMT
$220M
| $74K | ﹤0.01% |
+21,834
| New | +$74K |
|
1240
Enerpac Tool Group
EPAC
$2.3B
| $73K | ﹤0.01% |
+1,912
| New | +$73K |
|
1241
Direxion Daily MSCI Mexico Bull 3X Shares
MEXX
$21M
| $73K | ﹤0.01% |
4,252
+2,774
| +188% | +$47.6K |
|
|
SYRS
1242
DELISTED
Syros Pharmaceuticals, Inc. Common Stock
SYRS
| $72K | ﹤0.01% |
14,091
+13,859
| +5,974% | +$70.8K |
|
1243
Arcosa
ACA
$4.67B
| $72K | ﹤0.01% |
+867
| New | +$72K |
|
1244
Blackstone Mortgage Trust
BXMT
$3.35B
| $72K | ﹤0.01% |
+4,173
| New | +$72K |
|
1245
iShares US Oil & Gas Exploration & Production ETF
IEO
$469M
| $72K | ﹤0.01% |
733
-1,067
| -59% | -$105K |
|
1246
Direxion Daily Junior Gold Miners Index Bear 2X Shares
JDST
$48.8M
| $72K | ﹤0.01% |
+1,874
| New | +$72K |
|
1247
BCB Bancorp
BCBP
$148M
| $71K | ﹤0.01% |
+6,698
| New | +$71K |
|
1248
CMS Energy
CMS
$21.5B
| $71K | ﹤0.01% |
1,202
-1,782
| -60% | -$105K |
|
1249
Invesco Aerospace & Defense ETF
PPA
$6.29B
| $71K | ﹤0.01% |
700
+243
| +53% | +$24.6K |
|
1250
Ring Energy
REI
$219M
| $71K | ﹤0.01% |
42,051
-53,147
| -56% | -$89.7K |
|