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 | |
|---|---|---|---|---|---|---|
51
iShares 7-10 Year Treasury Bond ETF
IEF
$35.6B
| $3.23M | 0.01% |
28,698
-6,884
| -19% | -$774K |
|
52
Citigroup
C
$175B
| $3.17M | 0.01% |
+45,840
| New | +$3.17M |
|
53
LKQ Corp
LKQ
$8.23B
| $3.14M | 0.01% |
+99,784
| New | +$3.14M |
|
54
Humana
HUM
$37.5B
| $3.09M | 0.01% |
12,098
-12,078
| -50% | -$3.09M |
|
55
iShares MSCI United Kingdom ETF
EWU
$2.88B
| $3.03M | 0.01% |
+96,446
| New | +$3.03M |
|
56
Advance Auto Parts
AAP
$3.54B
| $3.02M | 0.01% |
18,238
+1,500
| +9% | +$248K |
|
57
Analog Devices
ADI
$120B
| $3M | 0.01% |
26,847
-49,301
| -65% | -$5.51M |
|
|
B
58
Barrick Mining Corporation
B
$46.3B
| $2.94M | 0.01% |
+169,730
| New | +$2.94M |
|
59
Stanley Black & Decker
SWK
$11.3B
| $2.94M | 0.01% |
20,368
-1,706
| -8% | -$246K |
|
60
Invesco S&P 500 Equal Weight ETF
RSP
$73.5B
| $2.93M | 0.01% |
27,148
+25,125
| +1,242% | +$2.72M |
|
61
Lockheed Martin
LMT
$105B
| $2.78M | 0.01% |
7,124
-15,352
| -68% | -$5.99M |
|
62
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$304M
| $2.67M | 0.01% |
109,510
+83,818
| +326% | +$2.04M |
|
63
Zscaler
ZS
$42.1B
| $2.59M | 0.01% |
54,895
+54,364
| +10,238% | +$2.57M |
|
64
MongoDB
MDB
$25.5B
| $2.55M | 0.01% |
21,154
+15,830
| +297% | +$1.91M |
|
65
NetEase
NTES
$85.4B
| $2.52M | 0.01% |
+9,484
| New | +$2.52M |
|
66
Ventas
VTR
$30.7B
| $2.51M | 0.01% |
34,358
+5,359
| +18% | +$391K |
|
|
Y
67
DELISTED
Alleghany Corporation
Y
| $2.5M | 0.01% |
+3,140
| New | +$2.5M |
|
68
Colgate-Palmolive
CL
$67.7B
| $2.5M | 0.01% |
34,052
+23,064
| +210% | +$1.7M |
|
69
Rio Tinto
RIO
$102B
| $2.48M | 0.01% |
+47,674
| New | +$2.48M |
|
70
General Motors
GM
$55B
| $2.46M | 0.01% |
+65,601
| New | +$2.46M |
|
71
Direxion Daily Gold Miners Index Bull 2X Shares
NUGT
$820M
| $2.46M | 0.01% |
88,165
-43,914
| -33% | -$1.22M |
|
|
CELG
72
DELISTED
Celgene Corp
CELG
| $2.45M | 0.01% |
24,695
+24,022
| +3,569% | +$2.39M |
|
73
Vanguard S&P 500 ETF
VOO
$724B
| $2.44M | 0.01% |
8,959
+5,514
| +160% | +$1.5M |
|
74
Acadia Pharmaceuticals
ACAD
$4.34B
| $2.44M | 0.01% |
67,820
+34,775
| +105% | +$1.25M |
|
75
Domino's
DPZ
$15.8B
| $2.41M | 0.01% |
9,872
+9,698
| +5,574% | +$2.37M |
|