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 | |
|---|---|---|---|---|---|---|
|
SWN
351
DELISTED
Southwestern Energy Company
SWN
| $692K | 0.03% |
84,738
+61,290
| +261% | +$501K |
|
352
Entegris
ENTG
$14.5B
| $684K | 0.03% |
+29,269
| New | +$684K |
|
353
iShares Core S&P 500 ETF
IVV
$648B
| $684K | 0.03% |
+2,885
| New | +$684K |
|
354
Energizer
ENR
$2.02B
| $676K | 0.03% |
12,140
+4,215
| +53% | +$235K |
|
355
Sherwin-Williams
SHW
$87.2B
| $675K | 0.03% |
6,531
-9,978
| -60% | -$1.03M |
|
356
TripAdvisor
TRIP
$2.22B
| $673K | 0.03% |
+15,598
| New | +$673K |
|
|
UNVR
357
DELISTED
Univar Solutions Inc.
UNVR
| $673K | 0.03% |
+21,961
| New | +$673K |
|
358
Roper Technologies
ROP
$54.8B
| $672K | 0.03% |
+3,255
| New | +$672K |
|
359
Broadridge
BR
$28.4B
| $669K | 0.03% |
9,859
+1,392
| +16% | +$94.5K |
|
360
Advanced Energy
AEIS
$6.4B
| $667K | 0.03% |
9,736
+8,252
| +556% | +$565K |
|
361
Expeditors International
EXPD
$16.8B
| $667K | 0.03% |
11,811
+1,980
| +20% | +$112K |
|
|
AFSI
362
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $667K | 0.03% |
+36,148
| New | +$667K |
|
363
Designer Brands
DBI
$215M
| $665K | 0.03% |
+32,175
| New | +$665K |
|
|
LKSD
364
DELISTED
LSC Communications, Inc.
LKSD
| $662K | 0.03% |
+26,324
| New | +$662K |
|
365
KB Home
KBH
$4.42B
| $650K | 0.03% |
+32,706
| New | +$650K |
|
|
CDK
366
DELISTED
CDK Global, Inc.
CDK
| $647K | 0.03% |
+9,965
| New | +$647K |
|
367
Autodesk
ADSK
$68.8B
| $645K | 0.03% |
+7,461
| New | +$645K |
|
368
STMicroelectronics
STM
$25.3B
| $641K | 0.03% |
41,486
+19,571
| +89% | +$302K |
|
369
Nu Skin
NUS
$610M
| $635K | 0.03% |
+11,436
| New | +$635K |
|
370
Duluth Holdings
DLTH
$153M
| $633K | 0.03% |
29,771
+28,144
| +1,730% | +$598K |
|
371
Anywhere Real Estate
HOUS
$824M
| $633K | 0.03% |
+21,278
| New | +$633K |
|
372
KeyCorp
KEY
$21B
| $633K | 0.03% |
+35,637
| New | +$633K |
|
373
Park Hotels & Resorts
PK
$2.42B
| $633K | 0.03% |
+24,671
| New | +$633K |
|
|
VAR
374
DELISTED
Varian Medical Systems, Inc.
VAR
| $631K | 0.03% |
+6,925
| New | +$631K |
|
375
D.R. Horton
DHI
$50.6B
| $630K | 0.03% |
+18,922
| New | +$630K |
|