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 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
376
Under Armour
UAA
$2.16B
| $361K | 0.02% |
9,000
-19,201
| -68% | -$770K |
|
377
VanEck Semiconductor ETF
SMH
$28.2B
| $359K | 0.02% |
+12,610
| New | +$359K |
|
378
Vanguard Value ETF
VTV
$143B
| $358K | 0.02% |
4,218
+1,193
| +39% | +$101K |
|
|
KATE
379
DELISTED
Kate Spade & Company
KATE
| $357K | 0.02% |
+17,350
| New | +$357K |
|
380
ProShares Ultra Gold
UGL
$625M
| $354K | 0.02% |
31,500
+22,640
| +256% | +$254K |
|
|
BHR
381
Braemar Hotels & Resorts
BHR
$199M
| $353K | 0.02% |
+25,254
| New | +$353K |
|
382
ProShares UltraShort NASDAQ Biotechnology
BIS
$2.33M
| $351K | 0.02% |
2,113
-4,698
| -69% | -$780K |
|
383
Altisource Portfolio Solutions
ASPS
$126M
| $349K | 0.02% |
+1,569
| New | +$349K |
|
384
Travel + Leisure Co
TNL
$4.04B
| $347K | 0.02% |
+10,811
| New | +$347K |
|
|
WPX
385
DELISTED
WPX Energy, Inc.
WPX
| $346K | 0.02% |
37,193
-21,729
| -37% | -$202K |
|
|
RLYP
386
DELISTED
RELYPSA INC COM
RLYP
| $344K | 0.02% |
18,613
+2,966
| +19% | +$54.8K |
|
|
INXN
387
DELISTED
Interxion Holding N.V.
INXN
| $339K | 0.02% |
9,216
+5,220
| +131% | +$192K |
|
|
DYN
388
DELISTED
Dynegy, Inc.
DYN
| $339K | 0.02% |
+19,670
| New | +$339K |
|
|
SIVB
389
DELISTED
SVB Financial Group
SIVB
| $338K | 0.02% |
+3,561
| New | +$338K |
|
390
Avery Dennison
AVY
$13B
| $337K | 0.02% |
+4,514
| New | +$337K |
|
391
IAC Inc
IAC
$2.88B
| $337K | 0.02% |
33,567
-1,113
| -3% | -$11.2K |
|
392
Vertex Pharmaceuticals
VRTX
$102B
| $337K | 0.02% |
3,919
+1,969
| +101% | +$169K |
|
|
DNO
393
DELISTED
United States Short Oil Fund
DNO
| $336K | 0.02% |
4,978
+3,456
| +227% | +$233K |
|
394
Gogo Inc
GOGO
$1.39B
| $335K | 0.02% |
39,933
+35,668
| +836% | +$299K |
|
395
Under Armour Class C
UA
$2.09B
| $335K | 0.02% |
+9,225
| New | +$335K |
|
|
BREW
396
DELISTED
Craft Brew Alliance, Inc.
BREW
| $333K | 0.02% |
+28,908
| New | +$333K |
|
|
DERM
397
DELISTED
Dermira, Inc.
DERM
| $330K | 0.02% |
+11,284
| New | +$330K |
|
|
GNC
398
DELISTED
GNC Holdings, Inc.
GNC
| $327K | 0.02% |
+13,491
| New | +$327K |
|
|
ACAS
399
DELISTED
American Capital Ltd
ACAS
| $327K | 0.02% |
20,705
-51,066
| -71% | -$807K |
|
400
Axalta
AXTA
$6.8B
| $323K | 0.02% |
+12,203
| New | +$323K |
|