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 | |
|---|---|---|---|---|---|---|
776
UFP Technologies
UFPT
$1.56B
| $317K | ﹤0.01% |
1,204
+583
| +94% | +$153K |
|
777
Embraer
ERJ
$10.8B
| $316K | ﹤0.01% |
12,251
-55,904
| -82% | -$1.44M |
|
778
Williams-Sonoma
WSM
$24.8B
| $315K | ﹤0.01% |
2,234
-16,780
| -88% | -$2.37M |
|
779
Hanesbrands
HBI
$2.24B
| $313K | ﹤0.01% |
+63,561
| New | +$313K |
|
780
Aurinia Pharmaceuticals
AUPH
$1.66B
| $312K | ﹤0.01% |
54,721
-53,807
| -50% | -$307K |
|
781
Lantheus
LNTH
$3.72B
| $311K | ﹤0.01% |
+3,878
| New | +$311K |
|
782
Liquidia Corp
LQDA
$2.33B
| $310K | ﹤0.01% |
25,890
+8,377
| +48% | +$100K |
|
783
Geron
GERN
$842M
| $308K | ﹤0.01% |
+72,707
| New | +$308K |
|
|
BLUE
784
DELISTED
bluebird bio
BLUE
| $307K | ﹤0.01% |
15,631
+2,604
| +20% | +$51.1K |
|
785
Ouster
OUST
$1.78B
| $306K | ﹤0.01% |
31,155
+28,575
| +1,108% | +$281K |
|
786
iShares US Home Construction ETF
ITB
$3.33B
| $304K | ﹤0.01% |
3,012
-19,383
| -87% | -$1.96M |
|
787
The RealReal
REAL
$1.07B
| $303K | ﹤0.01% |
95,211
+47,088
| +98% | +$150K |
|
788
Burlington
BURL
$17.6B
| $302K | ﹤0.01% |
1,261
-11,133
| -90% | -$2.67M |
|
789
Republic Services
RSG
$72.5B
| $302K | ﹤0.01% |
1,559
-4,159
| -73% | -$806K |
|
790
Antero Resources
AR
$10.1B
| $300K | ﹤0.01% |
9,200
-210,640
| -96% | -$6.87M |
|
791
Bio-Techne
TECH
$8.26B
| $300K | ﹤0.01% |
4,197
-2,427
| -37% | -$173K |
|
792
Atea Pharmaceuticals
AVIR
$263M
| $299K | ﹤0.01% |
90,337
-26,318
| -23% | -$87.1K |
|
793
Amdocs
DOX
$9.38B
| $299K | ﹤0.01% |
+3,800
| New | +$299K |
|
794
American Coastal Insurance
ACIC
$536M
| $297K | ﹤0.01% |
28,232
-7,210
| -20% | -$75.8K |
|
795
A.O. Smith
AOS
$10.4B
| $296K | ﹤0.01% |
3,623
+3,483
| +2,488% | +$285K |
|
796
Arbutus Biopharma
ABUS
$951M
| $295K | ﹤0.01% |
95,533
+7,403
| +8% | +$22.9K |
|
797
Old Republic International
ORI
$10.1B
| $295K | ﹤0.01% |
+9,577
| New | +$295K |
|
798
Invesco DB Agriculture Fund
DBA
$812M
| $294K | ﹤0.01% |
12,375
-8,570
| -41% | -$204K |
|
799
MGM Resorts International
MGM
$9.65B
| $294K | ﹤0.01% |
+6,617
| New | +$294K |
|
800
Raymond James Financial
RJF
$34.1B
| $294K | ﹤0.01% |
+2,380
| New | +$294K |
|