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 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
326
iShares S&P 500 Growth ETF
IVW
$66.3B
| $1.74M | ﹤0.01% |
+20,592
| New | +$1.74M |
|
327
Stellantis
STLA
$28.5B
| $1.74M | ﹤0.01% |
+61,361
| New | +$1.74M |
|
328
Western Alliance Bancorporation
WAL
$10B
| $1.73M | ﹤0.01% |
+27,028
| New | +$1.73M |
|
329
Vanguard Information Technology ETF
VGT
$107B
| $1.73M | ﹤0.01% |
3,303
-3,694
| -53% | -$1.94M |
|
330
Northrop Grumman
NOC
$82B
| $1.71M | ﹤0.01% |
+3,575
| New | +$1.71M |
|
331
Atmus Filtration Technologies
ATMU
$3.78B
| $1.71M | ﹤0.01% |
+52,990
| New | +$1.71M |
|
332
Murphy Oil
MUR
$3.79B
| $1.7M | ﹤0.01% |
37,242
-6,401
| -15% | -$292K |
|
333
iShares Russell 2000 Value ETF
IWN
$11.9B
| $1.7M | ﹤0.01% |
+10,680
| New | +$1.7M |
|
334
nVent Electric
NVT
$15.9B
| $1.69M | ﹤0.01% |
+22,471
| New | +$1.69M |
|
335
Barclays
BCS
$72.5B
| $1.67M | ﹤0.01% |
176,459
+136,840
| +345% | +$1.29M |
|
336
Navios Maritime Partners
NMM
$1.4B
| $1.65M | ﹤0.01% |
38,775
+27,895
| +256% | +$1.19M |
|
337
Allegiant Air
ALGT
$1.12B
| $1.64M | ﹤0.01% |
21,854
+18,797
| +615% | +$1.41M |
|
338
Devon Energy
DVN
$21.6B
| $1.64M | ﹤0.01% |
32,718
-57,223
| -64% | -$2.87M |
|
339
HDFC Bank
HDB
$182B
| $1.64M | ﹤0.01% |
+29,233
| New | +$1.64M |
|
340
Grifois
GRFS
$6.63B
| $1.58M | ﹤0.01% |
235,955
+234,108
| +12,675% | +$1.56M |
|
341
Roper Technologies
ROP
$54.3B
| $1.56M | ﹤0.01% |
2,776
-1,751
| -39% | -$981K |
|
342
MongoDB
MDB
$26.3B
| $1.55M | ﹤0.01% |
4,318
-35,929
| -89% | -$12.9M |
|
343
Matador Resources
MTDR
$5.66B
| $1.55M | ﹤0.01% |
23,155
-5,037
| -18% | -$336K |
|
344
BioMarin Pharmaceuticals
BMRN
$10.4B
| $1.54M | ﹤0.01% |
17,638
-10,865
| -38% | -$949K |
|
345
Air Lease Corp
AL
$7.11B
| $1.5M | ﹤0.01% |
+29,198
| New | +$1.5M |
|
346
Albertsons Companies
ACI
$10B
| $1.5M | ﹤0.01% |
69,995
+52,723
| +305% | +$1.13M |
|
347
Advanced Drainage Systems
WMS
$11.1B
| $1.5M | ﹤0.01% |
8,701
+3,483
| +67% | +$600K |
|
348
Altimmune
ALT
$334M
| $1.49M | ﹤0.01% |
146,259
+81,128
| +125% | +$825K |
|
349
Mattel
MAT
$5.5B
| $1.48M | ﹤0.01% |
74,961
+24,347
| +48% | +$482K |
|
350
Centene
CNC
$15.6B
| $1.48M | ﹤0.01% |
+18,899
| New | +$1.48M |
|