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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
FTAI Aviation
FTAI
$17.4B
| $88K | ﹤0.01% |
+6,802
| New | +$88K |
|
927
Markel Group
MKL
$24.8B
| $88K | ﹤0.01% |
+75
| New | +$88K |
|
928
Open Text
OTEX
$8.96B
| $88K | ﹤0.01% |
2,168
+1,769
| +443% | +$71.8K |
|
929
Turning Point Brands
TPB
$1.81B
| $88K | ﹤0.01% |
3,847
+1,296
| +51% | +$29.6K |
|
930
Bright Horizons
BFAM
$6.49B
| $87K | ﹤0.01% |
+573
| New | +$87K |
|
931
Ceragon Networks
CRNT
$180M
| $87K | ﹤0.01% |
32,353
+25,926
| +403% | +$69.7K |
|
932
Liberty Latin America Class C
LILAK
$1.55B
| $87K | ﹤0.01% |
+5,463
| New | +$87K |
|
|
EE
933
DELISTED
El Paso Electric Company
EE
| $87K | ﹤0.01% |
1,300
-1,261
| -49% | -$84.4K |
|
|
OIL
934
DELISTED
iPath Series B S&P GSCI Crude Oil ETN
OIL
| $87K | ﹤0.01% |
7,891
+826
| +12% | +$9.11K |
|
935
Simulations Plus
SLP
$289M
| $86K | ﹤0.01% |
2,503
+2,037
| +437% | +$70K |
|
|
TLRA
936
DELISTED
Telaria, Inc.
TLRA
| $86K | ﹤0.01% |
12,496
-18,636
| -60% | -$128K |
|
937
Century Communities
CCS
$2.06B
| $85K | ﹤0.01% |
2,777
+1,476
| +113% | +$45.2K |
|
938
Keurig Dr Pepper
KDP
$37.5B
| $85K | ﹤0.01% |
3,132
-23,930
| -88% | -$649K |
|
939
NatWest
NWG
$58B
| $85K | ﹤0.01% |
15,544
-73,692
| -83% | -$403K |
|
|
QD
940
Qudian
QD
$710M
| $85K | ﹤0.01% |
+12,454
| New | +$85K |
|
941
Trupanion
TRUP
$1.87B
| $85K | ﹤0.01% |
+3,374
| New | +$85K |
|
942
Yext
YEXT
$1.07B
| $85K | ﹤0.01% |
+5,405
| New | +$85K |
|
|
CNR
943
Core Natural Resources, Inc.
CNR
$3.72B
| $85K | ﹤0.01% |
+5,486
| New | +$85K |
|
944
Sonic Automotive
SAH
$2.83B
| $84K | ﹤0.01% |
+2,699
| New | +$84K |
|
|
PYX
945
DELISTED
Pyxus International, Inc.
PYX
| $84K | ﹤0.01% |
6,463
+6,151
| +1,971% | +$79.9K |
|
946
McKesson
MCK
$89.5B
| $81K | ﹤0.01% |
600
-20,596
| -97% | -$2.78M |
|
947
Radian Group
RDN
$4.81B
| $81K | ﹤0.01% |
3,553
-3,583
| -50% | -$81.7K |
|
948
Global X SuperDividend ETF
SDIV
$965M
| $81K | ﹤0.01% |
1,591
-641
| -29% | -$32.6K |
|
949
TechTarget
TTGT
$429M
| $81K | ﹤0.01% |
+3,605
| New | +$81K |
|
950
Uranium Energy
UEC
$5.35B
| $81K | ﹤0.01% |
83,405
+44,564
| +115% | +$43.3K |
|