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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
751
Paychex
PAYX
$47.6B
| $174K | 0.01% |
+2,959
| New | +$174K |
|
752
Protalix BioTherapeutics
PLX
$148M
| $174K | 0.01% |
+12,844
| New | +$174K |
|
753
Pure Storage
PSTG
$28.6B
| $174K | 0.01% |
17,783
-10,501
| -37% | -$103K |
|
|
SXCP
754
DELISTED
SunCoke Energy Partners, L.P.
SXCP
| $174K | 0.01% |
+11,386
| New | +$174K |
|
|
RICE
755
DELISTED
Rice Energy Inc.
RICE
| $174K | 0.01% |
7,366
-38,454
| -84% | -$908K |
|
|
CMO
756
DELISTED
Capstead Mortgage Corp.
CMO
| $174K | 0.01% |
16,515
+13,438
| +437% | +$142K |
|
757
Cadiz
CDZI
$341M
| $172K | 0.01% |
+11,470
| New | +$172K |
|
758
Ross Stores
ROST
$48B
| $172K | 0.01% |
+2,613
| New | +$172K |
|
759
Exact Sciences
EXAS
$9.96B
| $171K | 0.01% |
+7,253
| New | +$171K |
|
760
Generac Holdings
GNRC
$10.7B
| $171K | 0.01% |
+4,603
| New | +$171K |
|
761
Abercrombie & Fitch
ANF
$4.13B
| $170K | 0.01% |
+14,325
| New | +$170K |
|
762
Genesco
GCO
$379M
| $170K | 0.01% |
+3,072
| New | +$170K |
|
763
Atlassian
TEAM
$44.4B
| $170K | 0.01% |
5,680
+83
| +1% | +$2.48K |
|
|
LOGM
764
DELISTED
LogMein, Inc.
LOGM
| $170K | 0.01% |
+1,751
| New | +$170K |
|
765
Big 5 Sporting Goods
BGFV
$31.9M
| $169K | 0.01% |
+11,212
| New | +$169K |
|
766
Bruker
BRKR
$5.08B
| $169K | 0.01% |
+7,275
| New | +$169K |
|
767
Century Communities
CCS
$2.04B
| $169K | 0.01% |
+6,678
| New | +$169K |
|
|
BCPC
768
Balchem Corporation
BCPC
$5.03B
| $169K | 0.01% |
+2,060
| New | +$169K |
|
|
NYMX
769
DELISTED
Nymox Pharmaceutical Corp
NYMX
| $169K | 0.01% |
46,723
+41,861
| +861% | +$151K |
|
770
Barclays
BCS
$73.2B
| $168K | 0.01% |
15,773
+10,169
| +181% | +$108K |
|
771
SPDR S&P Retail ETF
XRT
$350M
| $167K | 0.01% |
+3,962
| New | +$167K |
|
772
Boot Barn
BOOT
$5.5B
| $166K | 0.01% |
16,858
+15,845
| +1,564% | +$156K |
|
773
Caesarstone
CSTE
$51.8M
| $166K | 0.01% |
4,601
+1,179
| +34% | +$42.5K |
|
|
BPMC
774
DELISTED
Blueprint Medicines
BPMC
| $164K | 0.01% |
+4,106
| New | +$164K |
|
775
iShares MSCI Singapore ETF
EWS
$841M
| $164K | 0.01% |
7,233
+6,536
| +938% | +$148K |
|