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 |
Broadcom
AVGO
|
+$38.5M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.5M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
| 5 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$8.72M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.1M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.9M |
| 4 |
Walt Disney
DIS
|
+$14.5M |
| 5 |
Alibaba
BABA
|
+$13.3M |
Sector Composition
| 1 | Technology | 15.08% |
| 2 | Communication Services | 13.51% |
| 3 | Consumer Discretionary | 9.68% |
| 4 | Healthcare | 8.98% |
| 5 | Financials | 8.3% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Neurocrine Biosciences
NBIX
$14B
| $213K | 0.02% |
+5,408
| New | +$213K |
|
|
RLYP
427
DELISTED
RELYPSA INC COM
RLYP
| $212K | 0.02% |
15,647
-18,179
| -54% | -$246K |
|
|
WPZ
428
DELISTED
Williams Partners L.P.
WPZ
| $210K | 0.02% |
10,301
-10,941
| -52% | -$223K |
|
429
Telephone and Data Systems
TDS
$4.45B
| $209K | 0.02% |
6,961
+6,929
| +21,653% | +$208K |
|
430
CNX Resources
CNX
$4.14B
| $208K | 0.02% |
22,162
-2,480
| -10% | -$23.3K |
|
431
iShares Mortgage Real Estate ETF
REM
$615M
| $207K | 0.02% |
+5,355
| New | +$207K |
|
432
Yelp
YELP
$1.97B
| $207K | 0.02% |
10,421
-37,659
| -78% | -$748K |
|
433
Cigna
CI
$80.7B
| $206K | 0.02% |
+1,507
| New | +$206K |
|
434
National Healthcare
NHC
$1.76B
| $205K | 0.02% |
3,300
+2,878
| +682% | +$179K |
|
435
ProShares UltraShort Bloomberg Crude Oil
SCO
$120M
| $202K | 0.02% |
155
-36
| -19% | -$46.9K |
|
|
SPWR
436
DELISTED
SunPower Corporation Common Stock
SPWR
| $202K | 0.02% |
+13,819
| New | +$202K |
|
|
SE
437
DELISTED
Spectra Energy Corp Wi
SE
| $202K | 0.02% |
6,622
+5,453
| +466% | +$166K |
|
438
Cheniere Energy
LNG
$52.1B
| $201K | 0.02% |
+5,945
| New | +$201K |
|
439
Olin
OLN
$2.92B
| $201K | 0.02% |
+11,615
| New | +$201K |
|
|
IMPV
440
DELISTED
Imperva, Inc.
IMPV
| $201K | 0.02% |
+3,985
| New | +$201K |
|
|
ASCMA
441
DELISTED
Ascent Capital Group, Inc. Series A
ASCMA
| $201K | 0.02% |
+13,631
| New | +$201K |
|
|
SNI
442
DELISTED
Scripps Networks Interactive, Inc Common Class A
SNI
| $200K | 0.02% |
3,062
+3,031
| +9,777% | +$198K |
|
443
ProShares Ultra Silver
AGQ
$853M
| $199K | 0.02% |
6,085
-689
| -10% | -$22.5K |
|
444
Middleby
MIDD
$6.99B
| $198K | 0.02% |
+1,863
| New | +$198K |
|
445
Comscore
SCOR
$31.6M
| $198K | 0.02% |
+330
| New | +$198K |
|
446
PRA Group
PRAA
$653M
| $197K | 0.02% |
6,726
+3,520
| +110% | +$103K |
|
447
VeriSign
VRSN
$26.5B
| $196K | 0.02% |
2,224
-6,821
| -75% | -$601K |
|
|
ILG
448
DELISTED
ILG, Inc Common Stock
ILG
| $196K | 0.02% |
+13,601
| New | +$196K |
|
449
Hain Celestial
HAIN
$176M
| $195K | 0.02% |
4,776
+909
| +24% | +$37.1K |
|
|
CMRX
450
DELISTED
Chimerix, Inc.
CMRX
| $195K | 0.02% |
38,314
+22,601
| +144% | +$115K |
|