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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
AstraZeneca
AZN
$253B
| $739K | ﹤0.01% |
16,585
+7,527
| +83% | +$335K |
|
302
Abercrombie & Fitch
ANF
$4.49B
| $738K | ﹤0.01% |
+47,356
| New | +$738K |
|
303
DexCom
DXCM
$30.6B
| $735K | ﹤0.01% |
+19,712
| New | +$735K |
|
|
PTLA
304
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $735K | ﹤0.01% |
27,408
+8,799
| +47% | +$236K |
|
|
CY
305
DELISTED
Cypress Semiconductor
CY
| $730K | ﹤0.01% |
+31,319
| New | +$730K |
|
306
KB Home
KBH
$4.63B
| $729K | ﹤0.01% |
21,463
-31,941
| -60% | -$1.08M |
|
|
AYX
307
DELISTED
Alteryx, Inc.
AYX
| $725K | ﹤0.01% |
+6,749
| New | +$725K |
|
|
REGI
308
DELISTED
Renewable Energy Group, Inc.
REGI
| $725K | ﹤0.01% |
48,337
+28,845
| +148% | +$433K |
|
309
Builders FirstSource
BLDR
$16.3B
| $721K | ﹤0.01% |
35,085
+11,587
| +49% | +$238K |
|
|
TSG
310
DELISTED
The Stars Group Inc.
TSG
| $721K | ﹤0.01% |
48,187
+5,407
| +13% | +$80.9K |
|
311
Western Digital
WDC
$32.4B
| $710K | ﹤0.01% |
15,758
-87,993
| -85% | -$3.96M |
|
312
CyberArk
CYBR
$23.6B
| $705K | ﹤0.01% |
7,064
-11,117
| -61% | -$1.11M |
|
313
Aon
AON
$79.8B
| $703K | ﹤0.01% |
+3,635
| New | +$703K |
|
|
CZR
314
DELISTED
Caesars Entertainment Corporation
CZR
| $702K | ﹤0.01% |
60,247
-55,331
| -48% | -$645K |
|
|
MDC
315
DELISTED
M.D.C. Holdings, Inc.
MDC
| $699K | ﹤0.01% |
+17,533
| New | +$699K |
|
|
ZUO
316
DELISTED
Zuora, Inc.
ZUO
| $680K | ﹤0.01% |
45,224
+27,195
| +151% | +$409K |
|
317
Philips
PHG
$26.5B
| $674K | ﹤0.01% |
17,724
+16,995
| +2,331% | +$646K |
|
318
iShares US Financials ETF
IYF
$4.02B
| $668K | ﹤0.01% |
+10,386
| New | +$668K |
|
319
BGC Group
BGC
$4.73B
| $665K | ﹤0.01% |
121,014
+20,926
| +21% | +$115K |
|
|
TCF
320
DELISTED
TCF Financial Corporation Common Stock
TCF
| $664K | ﹤0.01% |
+17,442
| New | +$664K |
|
321
DTE Energy
DTE
$28B
| $662K | ﹤0.01% |
5,859
+1,677
| +40% | +$189K |
|
322
Trip.com Group
TCOM
$47.7B
| $660K | ﹤0.01% |
22,557
+18,950
| +525% | +$554K |
|
|
EPAY
323
DELISTED
Bottomline Technologies Inc
EPAY
| $652K | ﹤0.01% |
16,586
+4,880
| +42% | +$192K |
|
324
Vanguard Growth ETF
VUG
$187B
| $649K | ﹤0.01% |
+3,908
| New | +$649K |
|
325
Brinker International
EAT
$7.04B
| $646K | ﹤0.01% |
15,144
-20,572
| -58% | -$878K |
|