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 |
Amazon
AMZN
|
$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
$26.1M |
| 4 |
Booking.com
BKNG
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$42.8M |
| 2 |
Amgen
AMGN
|
$32.3M |
| 3 |
Baidu
BIDU
|
$21.9M |
| 4 |
Micron Technology
MU
|
$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
USCR
326
DELISTED
U S Concrete, Inc.
USCR
| $647K | 0.03% |
8,491
+5,784
| +214% | +$441K |
|
|
CY
327
DELISTED
Cypress Semiconductor
CY
| $647K | 0.03% |
43,132
-18,958
| -31% | -$284K |
|
328
Coterra Energy
CTRA
$18.3B
| $645K | 0.03% |
24,133
+10,186
| +73% | +$272K |
|
329
Park Hotels & Resorts
PK
$2.4B
| $645K | 0.03% |
23,429
+5,865
| +33% | +$161K |
|
|
KEM
330
DELISTED
KEMET Corporation
KEM
| $643K | 0.03% |
30,439
+28,245
| +1,287% | +$597K |
|
331
HCA Healthcare
HCA
$98.5B
| $642K | 0.03% |
+8,078
| New | +$642K |
|
332
Semtech
SMTC
$5.26B
| $642K | 0.03% |
+17,112
| New | +$642K |
|
333
Exelixis
EXEL
$10.2B
| $641K | 0.03% |
26,477
-4,261
| -14% | -$103K |
|
334
NOV
NOV
$4.95B
| $631K | 0.03% |
17,684
-6,790
| -28% | -$242K |
|
335
Rio Tinto
RIO
$104B
| $620K | 0.03% |
+13,150
| New | +$620K |
|
336
Dave & Buster's
PLAY
$820M
| $618K | 0.03% |
11,791
+10,886
| +1,203% | +$571K |
|
|
FIT
337
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $611K | 0.02% |
87,793
-134,644
| -61% | -$937K |
|
|
TCF
338
DELISTED
TCF Financial Corporation
TCF
| $610K | 0.02% |
35,855
-22,453
| -39% | -$382K |
|
339
Amicus Therapeutics
FOLD
$2.46B
| $608K | 0.02% |
40,336
-11,242
| -22% | -$169K |
|
|
ETFC
340
DELISTED
E*Trade Financial Corporation
ETFC
| $607K | 0.02% |
+13,937
| New | +$607K |
|
341
Mercury Systems
MRCY
$4.13B
| $603K | 0.02% |
11,636
-640
| -5% | -$33.2K |
|
342
Capital One
COF
$142B
| $601K | 0.02% |
7,106
-22,981
| -76% | -$1.94M |
|
|
HIMX
343
Himax Technologies
HIMX
$1.46B
| $601K | 0.02% |
+55,040
| New | +$601K |
|
344
Valero Energy
VLO
$48.7B
| $600K | 0.02% |
7,812
+3,765
| +93% | +$289K |
|
345
iShare MSCI Eurozone ETF
EZU
$7.85B
| $599K | 0.02% |
+13,842
| New | +$599K |
|
346
The Greenbrier Companies
GBX
$1.46B
| $597K | 0.02% |
+12,399
| New | +$597K |
|
|
LVLT
347
DELISTED
Level 3 Communications Inc
LVLT
| $596K | 0.02% |
+11,196
| New | +$596K |
|
348
Under Armour Class C
UA
$2.13B
| $588K | 0.02% |
39,195
+43
| +0.1% | +$645 |
|
349
Enterprise Products Partners
EPD
$68.6B
| $583K | 0.02% |
+22,366
| New | +$583K |
|
350
Range Resources
RRC
$8.27B
| $583K | 0.02% |
29,809
-69,852
| -70% | -$1.37M |
|