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 | |
|---|---|---|---|---|---|---|
676
Cirrus Logic
CRUS
$6.17B
| $477K | ﹤0.01% |
5,156
+3,869
| +301% | +$358K |
|
677
ING
ING
$74.6B
| $477K | ﹤0.01% |
28,950
-39,052
| -57% | -$643K |
|
678
Atea Pharmaceuticals
AVIR
$229M
| $471K | ﹤0.01% |
116,655
+103,197
| +767% | +$417K |
|
679
RAPT Therapeutics
RAPT
$328M
| $468K | ﹤0.01% |
+6,516
| New | +$468K |
|
680
Bio-Techne
TECH
$8.27B
| $466K | ﹤0.01% |
+6,624
| New | +$466K |
|
681
Sana Biotechnology
SANA
$795M
| $465K | ﹤0.01% |
46,516
+28,436
| +157% | +$284K |
|
682
Gaotu Techedu
GOTU
$850M
| $462K | ﹤0.01% |
70,607
+36,289
| +106% | +$237K |
|
683
Larimar Therapeutics
LRMR
$359M
| $462K | ﹤0.01% |
+60,900
| New | +$462K |
|
|
ALTM
684
DELISTED
Arcadium Lithium plc
ALTM
| $461K | ﹤0.01% |
+106,966
| New | +$461K |
|
|
RCM
685
DELISTED
R1 RCM Inc. Common Stock
RCM
| $461K | ﹤0.01% |
35,827
+34,895
| +3,744% | +$449K |
|
686
Anterix
ATEX
$417M
| $459K | ﹤0.01% |
13,667
+9,216
| +207% | +$310K |
|
687
CrossAmerica Partners
CAPL
$801M
| $459K | ﹤0.01% |
20,178
+20,139
| +51,638% | +$458K |
|
688
Alta Equipment Group
ALTG
$227M
| $458K | ﹤0.01% |
35,434
+29,497
| +497% | +$381K |
|
689
Tilray
TLRY
$1.35B
| $454K | ﹤0.01% |
+183,949
| New | +$454K |
|
690
Annexon
ANNX
$314M
| $453K | ﹤0.01% |
63,295
+56,542
| +837% | +$405K |
|
691
Gogo Inc
GOGO
$1.19B
| $453K | ﹤0.01% |
+51,669
| New | +$453K |
|
692
iRhythm Technologies
IRTC
$5.62B
| $453K | ﹤0.01% |
+3,911
| New | +$453K |
|
693
NovoCure
NVCR
$1.42B
| $453K | ﹤0.01% |
28,986
-27,125
| -48% | -$424K |
|
694
Regions Financial
RF
$24.2B
| $449K | ﹤0.01% |
+21,375
| New | +$449K |
|
|
SWAV
695
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $446K | ﹤0.01% |
1,371
-6,571
| -83% | -$2.14M |
|
696
FerroAtlántica
GSM
$782M
| $445K | ﹤0.01% |
+89,555
| New | +$445K |
|
|
VRNA
697
Verona Pharma
VRNA
$9.17B
| $445K | ﹤0.01% |
27,696
-30,726
| -53% | -$494K |
|
698
Direxion Daily Aerospace & Defense Bull 3X Shares
DFEN
$353M
| $444K | ﹤0.01% |
16,666
+11,223
| +206% | +$299K |
|
699
Ginkgo Bioworks
DNA
$673M
| $443K | ﹤0.01% |
9,551
+2,628
| +38% | +$122K |
|
700
Realty Income
O
$54.1B
| $441K | ﹤0.01% |
+8,164
| New | +$441K |
|