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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
EXPR
276
DELISTED
Express, Inc.
EXPR
| $520K | 0.04% |
2,208
+2,037
| +1,191% | +$480K |
|
277
Live Nation Entertainment
LYV
$37.9B
| $519K | 0.04% |
18,914
+18,064
| +2,125% | +$496K |
|
278
Netflix
NFLX
$529B
| $519K | 0.04% |
+5,274
| New | +$519K |
|
|
CTXS
279
DELISTED
Citrix Systems Inc
CTXS
| $518K | 0.04% |
+7,640
| New | +$518K |
|
|
VNET
280
VNET Group
VNET
$2.13B
| $516K | 0.04% |
+64,978
| New | +$516K |
|
|
GNC
281
DELISTED
GNC Holdings, Inc.
GNC
| $513K | 0.03% |
25,130
+11,639
| +86% | +$238K |
|
|
RSX
282
DELISTED
VanEck Russia ETF
RSX
| $512K | 0.03% |
27,311
-34,014
| -55% | -$638K |
|
283
InterDigital
IDCC
$7.43B
| $511K | 0.03% |
+6,464
| New | +$511K |
|
284
Skechers
SKX
$9.5B
| $509K | 0.03% |
22,250
+592
| +3% | +$13.5K |
|
285
AAR Corp
AIR
$2.71B
| $507K | 0.03% |
+16,198
| New | +$507K |
|
286
Invesco DB Agriculture Fund
DBA
$804M
| $507K | 0.03% |
+25,398
| New | +$507K |
|
287
Blackrock
BLK
$170B
| $505K | 0.03% |
+1,396
| New | +$505K |
|
288
Pure Storage
PSTG
$25.9B
| $501K | 0.03% |
37,033
+36,007
| +3,509% | +$487K |
|
|
AKS
289
DELISTED
AK Steel Holding Corp.
AKS
| $499K | 0.03% |
103,352
+40,371
| +64% | +$195K |
|
|
ALR
290
DELISTED
Alere Inc
ALR
| $497K | 0.03% |
11,511
-8,288
| -42% | -$358K |
|
|
JUNO
291
DELISTED
Juno Therapeutics, Inc.
JUNO
| $495K | 0.03% |
16,520
-14,311
| -46% | -$429K |
|
292
Wheaton Precious Metals
WPM
$47.3B
| $488K | 0.03% |
18,062
-22,681
| -56% | -$613K |
|
293
Stewart Information Services
STC
$2.06B
| $487K | 0.03% |
+10,963
| New | +$487K |
|
|
KATE
294
DELISTED
Kate Spade & Company
KATE
| $485K | 0.03% |
28,353
+11,003
| +63% | +$188K |
|
295
ProShares Ultra Silver
AGQ
$894M
| $475K | 0.03% |
9,884
+2,233
| +29% | +$107K |
|
296
Fiserv
FI
$73.4B
| $475K | 0.03% |
9,556
-30,034
| -76% | -$1.49M |
|
|
CSOD
297
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $475K | 0.03% |
10,344
-8,004
| -44% | -$368K |
|
298
Digital Realty Trust
DLR
$55.7B
| $474K | 0.03% |
4,883
+3,004
| +160% | +$292K |
|
299
Trane Technologies
TT
$92.1B
| $474K | 0.03% |
+6,979
| New | +$474K |
|
|
MBLY
300
DELISTED
Mobileye N.V.
MBLY
| $474K | 0.03% |
+11,137
| New | +$474K |
|