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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
326
Yext
YEXT
$1.1B
| $662K | ﹤0.01% |
+30,298
| New | +$662K |
|
327
Skechers
SKX
$9.5B
| $659K | ﹤0.01% |
+19,620
| New | +$659K |
|
|
WPX
328
DELISTED
WPX Energy, Inc.
WPX
| $659K | ﹤0.01% |
50,282
+46,416
| +1,201% | +$608K |
|
329
Dropbox
DBX
$8.06B
| $657K | ﹤0.01% |
30,159
-51,765
| -63% | -$1.13M |
|
|
XLRN
330
DELISTED
Acceleron Pharma Inc.
XLRN
| $651K | ﹤0.01% |
14,000
+12,598
| +899% | +$586K |
|
|
TECD
331
DELISTED
Tech Data Corp
TECD
| $648K | ﹤0.01% |
6,337
+4,979
| +367% | +$509K |
|
332
Albemarle
ALB
$9.6B
| $647K | ﹤0.01% |
+7,893
| New | +$647K |
|
333
Cboe Global Markets
CBOE
$24.3B
| $645K | ﹤0.01% |
6,764
+1,712
| +34% | +$163K |
|
334
Neurocrine Biosciences
NBIX
$14.3B
| $636K | ﹤0.01% |
+7,223
| New | +$636K |
|
|
NSTG
335
DELISTED
NanoString Technologies, Inc.
NSTG
| $635K | ﹤0.01% |
26,555
+15,615
| +143% | +$373K |
|
|
USG
336
DELISTED
Usg
USG
| $631K | ﹤0.01% |
14,593
-14,650
| -50% | -$633K |
|
337
General Dynamics
GD
$86.8B
| $629K | ﹤0.01% |
+3,717
| New | +$629K |
|
338
Regions Financial
RF
$24.1B
| $629K | ﹤0.01% |
44,502
+26,025
| +141% | +$368K |
|
339
EchoStar
SATS
$19.3B
| $624K | ﹤0.01% |
+21,141
| New | +$624K |
|
|
MAG
340
MAG Silver
MAG
| $623K | ﹤0.01% |
58,476
+57,368
| +5,178% | +$611K |
|
341
CBRE Group
CBRE
$48.9B
| $621K | ﹤0.01% |
+12,562
| New | +$621K |
|
|
BHR
342
Braemar Hotels & Resorts
BHR
$203M
| $616K | ﹤0.01% |
51,005
+25,310
| +99% | +$306K |
|
343
W.W. Grainger
GWW
$47.5B
| $616K | ﹤0.01% |
2,048
-1,366
| -40% | -$411K |
|
344
Entergy
ETR
$39.2B
| $614K | ﹤0.01% |
+12,862
| New | +$614K |
|
345
Omega Healthcare
OHI
$12.7B
| $614K | ﹤0.01% |
16,115
+15,915
| +7,958% | +$606K |
|
346
Devon Energy
DVN
$22.1B
| $613K | ﹤0.01% |
19,453
-30,972
| -61% | -$976K |
|
347
MGM Resorts International
MGM
$9.98B
| $613K | ﹤0.01% |
23,919
-56,773
| -70% | -$1.45M |
|
348
Interactive Brokers
IBKR
$26.8B
| $605K | ﹤0.01% |
46,704
+37,348
| +399% | +$484K |
|
349
MSCI
MSCI
$42.9B
| $603K | ﹤0.01% |
3,035
-7,825
| -72% | -$1.55M |
|
350
Toyota
TM
$260B
| $603K | ﹤0.01% |
5,111
+2,251
| +79% | +$266K |
|