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 | |
|---|---|---|---|---|---|---|
976
Sweetgreen
SG
$1.03B
| $164K | ﹤0.01% |
5,469
-32,119
| -85% | -$963K |
|
977
Vital Farms
VITL
$2.1B
| $164K | ﹤0.01% |
+3,510
| New | +$164K |
|
978
Liberty Global Class C
LBTYK
$4.13B
| $163K | ﹤0.01% |
9,137
+4,846
| +113% | +$86.5K |
|
979
Diana Shipping
DSX
$214M
| $162K | ﹤0.01% |
56,922
+47,826
| +526% | +$136K |
|
|
QVCGA
980
QVC Group, Inc. Series A Common Stock
QVCGA
$83.7M
| $162K | ﹤0.01% |
5,149
-7,500
| -59% | -$236K |
|
981
Everspin Technologies
MRAM
$154M
| $161K | ﹤0.01% |
26,954
+18,149
| +206% | +$108K |
|
982
ProFrac Holding
ACDC
$698M
| $159K | ﹤0.01% |
21,513
-14,157
| -40% | -$105K |
|
983
Mid-America Apartment Communities
MAA
$16.6B
| $159K | ﹤0.01% |
1,116
-6,178
| -85% | -$880K |
|
984
PetMed Express
PETS
$56.4M
| $159K | ﹤0.01% |
39,350
+27,305
| +227% | +$110K |
|
985
Vir Biotechnology
VIR
$713M
| $159K | ﹤0.01% |
17,953
+13,221
| +279% | +$117K |
|
986
Backblaze
BLZE
$534M
| $158K | ﹤0.01% |
+25,773
| New | +$158K |
|
987
GeoPark
GPRK
$331M
| $158K | ﹤0.01% |
14,431
-10,218
| -41% | -$112K |
|
988
Jackson Financial
JXN
$6.75B
| $158K | ﹤0.01% |
+2,141
| New | +$158K |
|
|
VRNA
989
Verona Pharma
VRNA
$9.2B
| $158K | ﹤0.01% |
10,937
-16,759
| -61% | -$242K |
|
990
Mercer International
MERC
$204M
| $157K | ﹤0.01% |
18,426
-15,736
| -46% | -$134K |
|
991
Mesa Air Group
MESA
$58.6M
| $157K | ﹤0.01% |
92,262
+84,791
| +1,135% | +$144K |
|
992
ODDITY Tech
ODD
$3.48B
| $157K | ﹤0.01% |
4,014
-22,509
| -85% | -$880K |
|
993
iShares Select U.S. REIT ETF
ICF
$1.94B
| $156K | ﹤0.01% |
2,725
+710
| +35% | +$40.6K |
|
994
Ocular Therapeutix
OCUL
$2.27B
| $156K | ﹤0.01% |
22,942
-10,899
| -32% | -$74.1K |
|
995
T-REX 2X Long Tesla Daily Target ETF
TSLT
$416M
| $156K | ﹤0.01% |
12,375
+11,274
| +1,024% | +$142K |
|
996
Klaviyo
KVYO
$9.35B
| $155K | ﹤0.01% |
6,228
-13,418
| -68% | -$334K |
|
997
Lightwave Logic
LWLG
$393M
| $155K | ﹤0.01% |
51,940
-91
| -0.2% | -$272 |
|
998
Kontoor Brands
KTB
$4.67B
| $154K | ﹤0.01% |
+2,331
| New | +$154K |
|
999
Unusual Whales Subversive Democratic Trading ETF
NANC
$242M
| $153K | ﹤0.01% |
+4,219
| New | +$153K |
|
|
YALA
1000
Yalla Group
YALA
$1.18B
| $152K | ﹤0.01% |
33,435
+15,038
| +82% | +$68.4K |
|