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 | |
|---|---|---|---|---|---|---|
901
Build-A-Bear
BBW
$985M
| $207K | ﹤0.01% |
8,231
-14,200
| -63% | -$357K |
|
902
Atomera
ATOM
$103M
| $205K | ﹤0.01% |
53,888
+3,209
| +6% | +$12.2K |
|
903
Medpace
MEDP
$14B
| $205K | ﹤0.01% |
498
-2,580
| -84% | -$1.06M |
|
904
Enova International
ENVA
$2.94B
| $204K | ﹤0.01% |
+3,282
| New | +$204K |
|
905
Alliant Energy
LNT
$16.6B
| $204K | ﹤0.01% |
4,015
+1,630
| +68% | +$82.8K |
|
906
Radian Group
RDN
$4.81B
| $204K | ﹤0.01% |
6,587
-35,658
| -84% | -$1.1M |
|
907
Esperion Therapeutics
ESPR
$563M
| $203K | ﹤0.01% |
+91,844
| New | +$203K |
|
908
ASE Group
ASX
$24.2B
| $202K | ﹤0.01% |
+17,709
| New | +$202K |
|
909
Builders FirstSource
BLDR
$16.2B
| $202K | ﹤0.01% |
1,465
+667
| +84% | +$92K |
|
910
MINISO
MNSO
$7.73B
| $202K | ﹤0.01% |
10,604
+4,804
| +83% | +$91.5K |
|
911
Ocugen
OCGN
$334M
| $202K | ﹤0.01% |
130,462
-56,095
| -30% | -$86.9K |
|
912
First Financial Bankshares
FFIN
$5.13B
| $200K | ﹤0.01% |
+6,790
| New | +$200K |
|
913
NatWest
NWG
$58B
| $200K | ﹤0.01% |
24,913
+23,481
| +1,640% | +$189K |
|
914
Asana
ASAN
$3.26B
| $199K | ﹤0.01% |
14,279
-78,948
| -85% | -$1.1M |
|
915
Teucrium Corn Fund
CORN
$48.8M
| $198K | ﹤0.01% |
10,868
+3,984
| +58% | +$72.6K |
|
916
Ultragenyx Pharmaceutical
RARE
$3.01B
| $198K | ﹤0.01% |
4,835
+3,881
| +407% | +$159K |
|
917
Brookfield Infrastructure Partners
BIP
$14.4B
| $197K | ﹤0.01% |
+7,207
| New | +$197K |
|
918
iShares Russell 2000 Growth ETF
IWO
$12.8B
| $197K | ﹤0.01% |
+753
| New | +$197K |
|
919
LendingClub
LC
$1.92B
| $197K | ﹤0.01% |
+23,300
| New | +$197K |
|
920
Rentokil
RTO
$12.9B
| $197K | ﹤0.01% |
+6,677
| New | +$197K |
|
921
ProShares Short Russell2000
RWM
$124M
| $197K | ﹤0.01% |
+9,502
| New | +$197K |
|
922
Coursera
COUR
$1.78B
| $196K | ﹤0.01% |
27,434
+10,134
| +59% | +$72.4K |
|
923
Eventbrite
EB
$265M
| $196K | ﹤0.01% |
40,537
+34,804
| +607% | +$168K |
|
924
AdvanSix
ASIX
$586M
| $195K | ﹤0.01% |
8,539
+5,233
| +158% | +$120K |
|
925
Conagra Brands
CAG
$9.31B
| $194K | ﹤0.01% |
+6,827
| New | +$194K |
|