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 |
Financial Select Sector SPDR Fund
XLF
|
+$42.3M |
| 2 |
Shopify
SHOP
|
+$37.4M |
| 3 |
Verizon
VZ
|
+$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Merck
MRK
|
+$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
+$38.3M |
| 2 |
Carnival Corp
CCL
|
+$37.6M |
| 3 |
GE Aerospace
GE
|
+$33M |
| 4 |
Advanced Micro Devices
AMD
|
+$30.6M |
| 5 |
Micron Technology
MU
|
+$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
Sarepta Therapeutics
SRPT
$1.85B
| $1.48M | ﹤0.01% |
16,443
-2,268
| -12% | -$204K |
|
402
Crown Holdings
CCK
$11B
| $1.48M | ﹤0.01% |
13,369
+8,644
| +183% | +$956K |
|
|
WBT
403
DELISTED
Welbilt, Inc.
WBT
| $1.48M | ﹤0.01% |
62,221
+15,610
| +33% | +$371K |
|
404
Veeva Systems
VEEV
$46.3B
| $1.48M | ﹤0.01% |
+5,783
| New | +$1.48M |
|
405
Edison International
EIX
$21.1B
| $1.47M | ﹤0.01% |
21,536
-477
| -2% | -$32.5K |
|
406
ProShares Ultra Russell2000
UWM
$381M
| $1.47M | ﹤0.01% |
26,408
+22,529
| +581% | +$1.25M |
|
407
Gray Television
GTN
$597M
| $1.46M | ﹤0.01% |
+72,286
| New | +$1.46M |
|
408
Dominion Energy
D
$50.2B
| $1.45M | ﹤0.01% |
+18,431
| New | +$1.45M |
|
409
Wabtec
WAB
$32.5B
| $1.44M | ﹤0.01% |
15,620
-1,812
| -10% | -$167K |
|
410
Zillow
ZG
$20.3B
| $1.43M | ﹤0.01% |
23,050
+8,713
| +61% | +$542K |
|
|
SBNY
411
DELISTED
Signature Bank
SBNY
| $1.43M | ﹤0.01% |
4,432
-14,890
| -77% | -$4.81M |
|
412
F5
FFIV
$18.7B
| $1.43M | ﹤0.01% |
5,852
+4,242
| +263% | +$1.04M |
|
413
Tyson Foods
TSN
$19.9B
| $1.43M | ﹤0.01% |
16,428
-45,911
| -74% | -$4M |
|
414
Alight
ALIT
$1.96B
| $1.42M | ﹤0.01% |
+130,909
| New | +$1.42M |
|
415
Olaplex Holdings
OLPX
$967M
| $1.41M | ﹤0.01% |
+48,488
| New | +$1.41M |
|
|
RFP
416
DELISTED
Resolute Forest Products Inc.
RFP
| $1.41M | ﹤0.01% |
92,370
+13,164
| +17% | +$201K |
|
|
AMRS
417
DELISTED
Amyris Inc.
AMRS
| $1.4M | ﹤0.01% |
259,367
+143,277
| +123% | +$775K |
|
418
ARK Autonomous Technology & Robotics ETF
ARKQ
$1.3B
| $1.4M | ﹤0.01% |
18,205
-4,035
| -18% | -$311K |
|
419
Papa John's
PZZA
$1.6B
| $1.39M | ﹤0.01% |
10,389
+395
| +4% | +$52.7K |
|
420
Rithm Capital
RITM
$6.64B
| $1.38M | ﹤0.01% |
129,255
+126,655
| +4,871% | +$1.36M |
|
421
Axon Enterprise
AXON
$57.5B
| $1.38M | ﹤0.01% |
8,809
+5,032
| +133% | +$790K |
|
422
Global Payments
GPN
$21.1B
| $1.38M | ﹤0.01% |
+10,198
| New | +$1.38M |
|
423
Masco
MAS
$15.4B
| $1.38M | ﹤0.01% |
19,628
+3,348
| +21% | +$235K |
|
424
SPDR S&P Regional Banking ETF
KRE
$4.23B
| $1.38M | ﹤0.01% |
19,433
-47,691
| -71% | -$3.38M |
|
425
Chegg
CHGG
$168M
| $1.37M | ﹤0.01% |
44,691
+32,577
| +269% | +$1M |
|