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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
Morgan Stanley
MS
$340B
| $3.25M | 0.14% |
+75,966
| New | +$3.37M |
|
127
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $3.2M | 0.14% |
21,582
+2,364
| +12% | +$156K |
|
|
128
CALL
NVIDIA
NVDA
$5.02T
| $3.2M | 0.14% |
209,920
-69,240
| -25% | -$184K |
|
129
CALL
Advanced Micro Devices
AMD
$888B
| $3.19M | 0.14% |
12,779
+5,644
| +79% | +$71.6K |
|
130
Sprouts Farmers Market
SFM
$7.02B
| $3.16M | 0.14% |
136,729
+136,630
| +138,010% | +$2.68M |
|
131
Tyson Foods
TSN
$20.4B
| $3.15M | 0.14% |
+51,071
| New | +$3.22M |
|
132
Microchip Technology
MCHP
$45.3B
| $3.15M | 0.14% |
+85,308
| New | +$3.01M |
|
133
Incyte
INCY
$23.1B
| $3.11M | 0.13% |
23,262
+21,346
| +1,114% | +$2.72M |
|
134
BWX Technologies
BWXT
$15.9B
| $3.11M | 0.13% |
65,273
+43,892
| +205% | +$1.92M |
|
|
X
135
DELISTED
US Steel
X
| $3.1M | 0.13% |
91,592
+46,720
| +104% | +$1.66M |
|
136
VanEck Junior Gold Miners ETF
GDXJ
$7.01B
| $3.08M | 0.13% |
85,642
+46,551
| +119% | +$1.74M |
|
137
CALL
Alibaba
BABA
$283B
| $3.06M | 0.13% |
7,064
-3,076
| -30% | -$313K |
|
138
SPDR Gold Trust
GLD
$132B
| $3.06M | 0.13% |
25,799
-9,225
| -26% | -$1.07M |
|
139
PUT
Meta Platforms (Facebook)
META
$1.63T
| $3M | 0.13% |
9,274
-1,147
| -11% | -$153K |
|
140
Constellation Brands
STZ
$22.3B
| $2.94M | 0.13% |
18,128
-17,250
| -49% | -$2.69M |
|
141
ASML
ASML
$692B
| $2.91M | 0.13% |
21,910
+15,128
| +223% | +$1.86M |
|
|
TWTR
142
DELISTED
Twitter, Inc.
TWTR
| $2.89M | 0.13% |
193,459
+179,461
| +1,282% | +$2.91M |
|
143
CALL
Walt Disney
DIS
$167B
| $2.85M | 0.12% |
5,343
+1,149
| +27% | +$127K |
|
144
PUT
Netflix
NFLX
$286B
| $2.85M | 0.12% |
75,210
-23,180
| -24% | -$325K |
|
145
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $2.84M | 0.12% |
5,919
-1,334
| -18% | -$272K |
|
146
Palo Alto Networks
PANW
$279B
| $2.83M | 0.12% |
150,732
-300,732
| -67% | -$6.72M |
|
|
147
PUT
Goldman Sachs
GS
$320B
| $2.81M | 0.12% |
4,364
-3,217
| -42% | -$777K |
|
148
Salesforce
CRM
$139B
| $2.78M | 0.12% |
33,728
-10,203
| -23% | -$815K |
|
|
FNSR
149
DELISTED
Finisar Corp
FNSR
| $2.77M | 0.12% |
101,183
+82,197
| +433% | +$2.52M |
|
|
GAP
150
The Gap Inc
GAP
$7.16B
| $2.76M | 0.12% |
113,519
+82,191
| +262% | +$1.96M |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.