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 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1626
Repare Therapeutics
RPTX
$75.6M
| $24K | ﹤0.01% |
5,277
-5,276
| -50% | -$24K |
|
1627
SES AI
SES
$565M
| $24K | ﹤0.01% |
14,307
+12,604
| +740% | +$21.1K |
|
1628
Olympic Steel
ZEUS
$376M
| $24K | ﹤0.01% |
351
+197
| +128% | +$13.5K |
|
|
MNTX
1629
DELISTED
Manitex International, Inc.
MNTX
| $24K | ﹤0.01% |
3,535
+833
| +31% | +$5.66K |
|
1630
Advantage Solutions
ADV
$616M
| $23K | ﹤0.01% |
+5,449
| New | +$23K |
|
1631
Applied Digital
APLD
$5.24B
| $23K | ﹤0.01% |
5,505
-25,917
| -82% | -$108K |
|
1632
Empire State Realty Trust
ESRT
$1.3B
| $23K | ﹤0.01% |
2,339
-1,999
| -46% | -$19.7K |
|
1633
Gambling.com
GAMB
$295M
| $23K | ﹤0.01% |
2,616
+2,450
| +1,476% | +$21.5K |
|
1634
Gevo
GEVO
$508M
| $23K | ﹤0.01% |
+30,609
| New | +$23K |
|
1635
IDT Corp
IDT
$1.71B
| $23K | ﹤0.01% |
624
-8,990
| -94% | -$331K |
|
1636
Monarch Casino & Resort
MCRI
$1.88B
| $23K | ﹤0.01% |
+315
| New | +$23K |
|
1637
Quanex
NX
$674M
| $23K | ﹤0.01% |
+602
| New | +$23K |
|
1638
ProShares Short Real Estate
REK
$10.5M
| $23K | ﹤0.01% |
+1,299
| New | +$23K |
|
1639
Reynolds Consumer Products
REYN
$4.87B
| $23K | ﹤0.01% |
+824
| New | +$23K |
|
1640
Rackspace Technology
RXT
$359M
| $23K | ﹤0.01% |
15,065
+12,253
| +436% | +$18.7K |
|
|
SAFE
1641
Safehold
SAFE
$1.2B
| $23K | ﹤0.01% |
1,119
-23,481
| -95% | -$483K |
|
|
AMPS
1642
DELISTED
Altus Power, Inc.
AMPS
| $23K | ﹤0.01% |
4,930
-49,783
| -91% | -$232K |
|
|
PYCR
1643
DELISTED
Paycor HCM, Inc. Common Stock
PYCR
| $23K | ﹤0.01% |
1,218
+1,111
| +1,038% | +$21K |
|
|
NAPA
1644
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $23K | ﹤0.01% |
+2,497
| New | +$23K |
|
1645
Douglas Elliman
DOUG
$275M
| $22K | ﹤0.01% |
14,133
+7,085
| +101% | +$11K |
|
1646
Columbia Financial
CLBK
$1.67B
| $22K | ﹤0.01% |
+1,305
| New | +$22K |
|
1647
WisdomTree US SmallCap Earnings Fund
EES
$649M
| $22K | ﹤0.01% |
+453
| New | +$22K |
|
1648
Jakks Pacific
JAKK
$204M
| $22K | ﹤0.01% |
893
+102
| +13% | +$2.51K |
|
1649
Lindblad Expeditions
LIND
$720M
| $22K | ﹤0.01% |
2,376
-1,514
| -39% | -$14K |
|
1650
The RMR Group
RMR
$288M
| $22K | ﹤0.01% |
954
+751
| +370% | +$17.3K |
|