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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
101
PUT
Broadcom
AVGO
$1.84T
| $35.7M | 0.14% |
14,730
+4,590
| +45% | +$113K |
|
102
PUT
FedEx
FDX
$73.1B
| $35.6M | 0.14% |
1,567
-1,249
| -44% | -$309K |
|
103
CALL
Mastercard
MA
$476B
| $35.4M | 0.14% |
1,802
+142
| +9% | +$26.7K |
|
104
PUT
Align Technology
ALGN
$12.5B
| $35.4M | 0.14% |
1,034
+80
| +8% | +$23.9K |
|
|
CELG
105
CALL
DELISTED
Celgene Corp
CELG
| $35.2M | 0.14% |
4,435
-2,011
| -31% | -$167K |
|
|
106
Netflix
NFLX
$286B
| $35.1M | 0.14% |
897,530
-453,430
| -34% | -$15.5M |
|
107
PUT
ExxonMobil
XOM
$629B
| $34.9M | 0.14% |
4,214
+211
| +5% | +$16.8K |
|
108
PUT
Walmart Inc
WMT
$878B
| $34.3M | 0.13% |
12,000
-3,207
| -21% | -$91.2K |
|
109
PUT
Valero Energy
VLO
$93.5B
| $33.7M | 0.13% |
3,037
+586
| +24% | +$65.7K |
|
110
PUT
Qualcomm
QCOM
$183B
| $33.2M | 0.13% |
5,916
-2,132
| -26% | -$119K |
|
111
CALL
Procter & Gamble
PG
$345B
| $33.2M | 0.13% |
4,249
+1,789
| +73% | +$135K |
|
112
CALL
PepsiCo
PEP
$184B
| $33.1M | 0.13% |
3,045
+1,909
| +168% | +$197K |
|
113
PUT
AbbVie
ABBV
$448B
| $32.7M | 0.13% |
3,532
+7
| +0.2% | +$684 |
|
114
PUT
Altria Group
MO
$125B
| $32.1M | 0.13% |
5,658
+3,908
| +223% | +$225K |
|
115
CALL
Electronic Arts
EA
$52.4B
| $31.8M | 0.12% |
2,255
+599
| +36% | +$77.8K |
|
116
PUT
McDonald's
MCD
$188B
| $31.5M | 0.12% |
2,013
-605
| -23% | -$98.1K |
|
117
CALL
Intuitive Surgical
ISRG
$124B
| $31.1M | 0.12% |
1,950
-26,334
| -93% | -$4.02M |
|
118
PUT
Wynn Resorts
WYNN
$9.93B
| $30.8M | 0.12% |
1,842
-278
| -13% | -$51.3K |
|
119
PUT
Wells Fargo
WFC
$266B
| $30.6M | 0.12% |
5,522
-515
| -9% | -$27.6K |
|
120
PUT
Biogen
BIIB
$29.5B
| $30.6M | 0.12% |
1,053
+189
| +22% | +$53.1K |
|
121
CALL
Target
TGT
$63.4B
| $30.5M | 0.12% |
4,007
+285
| +8% | +$21K |
|
|
WW
122
PUT
DELISTED
WW International
WW
| $30.5M | 0.12% |
3,015
+481
| +19% | +$37.8K |
|
123
PUT
Union Pacific
UNP
$176B
| $30.4M | 0.12% |
2,146
-865
| -29% | -$121K |
|
124
PUT
Morgan Stanley
MS
$340B
| $30M | 0.12% |
6,319
+1,308
| +26% | +$68.3K |
|
|
TFCF
125
PUT
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $29.3M | 0.11% |
5,905
+4,256
| +258% | +$166K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.