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 | |
|---|---|---|---|---|---|---|
251
Lennar Class A
LEN
$36.7B
| $2.3M | ﹤0.01% |
+15,858
| New | +$2.3M |
|
252
Navios Maritime Partners
NMM
$1.42B
| $2.25M | ﹤0.01% |
44,100
+5,325
| +14% | +$272K |
|
253
Radware
RDWR
$1.07B
| $2.23M | ﹤0.01% |
122,467
-51,406
| -30% | -$937K |
|
254
Planet Fitness
PLNT
$8.77B
| $2.22M | ﹤0.01% |
30,217
-41,035
| -58% | -$3.02M |
|
255
Synovus
SNV
$7.15B
| $2.22M | ﹤0.01% |
55,251
-2,521
| -4% | -$101K |
|
256
Whirlpool
WHR
$5.28B
| $2.22M | ﹤0.01% |
+21,730
| New | +$2.22M |
|
257
iShares S&P 500 Growth ETF
IVW
$63.7B
| $2.22M | ﹤0.01% |
23,955
+3,363
| +16% | +$311K |
|
258
Ventas
VTR
$30.9B
| $2.22M | ﹤0.01% |
43,249
-15,241
| -26% | -$781K |
|
259
Cameco
CCJ
$33B
| $2.2M | ﹤0.01% |
+44,764
| New | +$2.2M |
|
260
WillScot Mobile Mini Holdings
WSC
$4.32B
| $2.2M | ﹤0.01% |
+58,496
| New | +$2.2M |
|
|
DFS
261
DELISTED
Discover Financial Services
DFS
| $2.2M | ﹤0.01% |
+16,813
| New | +$2.2M |
|
262
MACOM Technology Solutions
MTSI
$9.67B
| $2.2M | ﹤0.01% |
19,723
+16,827
| +581% | +$1.88M |
|
|
DO
263
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $2.18M | ﹤0.01% |
140,983
+81,355
| +136% | +$1.26M |
|
264
Coherent
COHR
$15.2B
| $2.16M | ﹤0.01% |
29,748
-108,217
| -78% | -$7.84M |
|
265
Western Digital
WDC
$31.9B
| $2.15M | ﹤0.01% |
+37,593
| New | +$2.15M |
|
266
Huntington Bancshares
HBAN
$25.7B
| $2.15M | ﹤0.01% |
162,758
+4,424
| +3% | +$58.3K |
|
267
Alnylam Pharmaceuticals
ALNY
$59.2B
| $2.14M | ﹤0.01% |
+8,803
| New | +$2.14M |
|
268
First Solar
FSLR
$22B
| $2.13M | ﹤0.01% |
9,449
-81,752
| -90% | -$18.4M |
|
269
XPeng
XPEV
$18.9B
| $2.13M | ﹤0.01% |
289,938
-97,338
| -25% | -$713K |
|
270
Alphabet (Google) Class C
GOOG
$2.84T
| $2.12M | ﹤0.01% |
11,566
-236,738
| -95% | -$43.4M |
|
271
Monster Beverage
MNST
$61B
| $2.12M | ﹤0.01% |
42,369
+37,584
| +785% | +$1.88M |
|
272
iShares Russell 1000 Growth ETF
IWF
$117B
| $2.12M | ﹤0.01% |
5,804
+2,936
| +102% | +$1.07M |
|
273
iShares Core S&P Small-Cap ETF
IJR
$86B
| $2.08M | ﹤0.01% |
19,507
+16,085
| +470% | +$1.72M |
|
274
AMC Entertainment Holdings
AMC
$1.41B
| $2.08M | ﹤0.01% |
+417,642
| New | +$2.08M |
|
275
Celestica
CLS
$27.9B
| $2.08M | ﹤0.01% |
36,262
+22,398
| +162% | +$1.28M |
|