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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
151
PUT
Western Digital
WDC
$189B
| $30.3M | 0.08% |
8,418
+1,671
| +25% | +$57.3K |
|
|
VMW
152
PUT
DELISTED
VMware, Inc
VMW
| $30M | 0.08% |
1,792
+606
| +51% | +$114K |
|
153
CALL
Delta Air Lines
DAL
$55.7B
| $29.7M | 0.08% |
5,226
+922
| +21% | +$51.7K |
|
|
AABA
154
CALL
DELISTED
Altaba Inc
AABA
| $29.3M | 0.08% |
4,230
+1,875
| +80% | +$131K |
|
|
TWTR
155
CALL
DELISTED
Twitter, Inc.
TWTR
| $29.2M | 0.08% |
8,378
+525
| +7% | +$19.3K |
|
156
CALL
Align Technology
ALGN
$12.5B
| $29M | 0.08% |
1,059
+589
| +125% | +$178K |
|
157
CALL
Biogen
BIIB
$29.5B
| $28.8M | 0.08% |
1,230
-293
| -19% | -$67.7K |
|
158
CALL
Las Vegas Sands
LVS
$30.4B
| $28.8M | 0.08% |
4,868
+1,641
| +51% | +$102K |
|
159
PUT
Bristol-Myers Squibb
BMY
$124B
| $28.6M | 0.08% |
6,312
-8,277
| -57% | -$386K |
|
160
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $28.6M | 0.08% |
913
+502
| +122% | +$167K |
|
|
XLNX
161
CALL
DELISTED
Xilinx Inc
XLNX
| $28.4M | 0.08% |
2,410
+1,219
| +102% | +$142K |
|
162
CALL
Nike
NKE
$63.7B
| $28.4M | 0.08% |
3,381
-3,130
| -48% | -$263K |
|
|
RHT
163
PUT
DELISTED
Red Hat Inc
RHT
| $28.3M | 0.08% |
1,507
+367
| +32% | +$67.7K |
|
164
CALL
JD.com
JD
$41.1B
| $28.3M | 0.08% |
9,333
+1,981
| +27% | +$57K |
|
165
PUT
Workday
WDAY
$36.4B
| $28.1M | 0.08% |
1,369
+167
| +14% | +$33.7K |
|
166
PUT
Wynn Resorts
WYNN
$9.93B
| $28.1M | 0.08% |
2,267
-899
| -28% | -$116K |
|
167
PUT
Roku
ROKU
$21.4B
| $28.1M | 0.08% |
3,102
-2,168
| -41% | -$174K |
|
168
PUT
Verizon
VZ
$183B
| $28.1M | 0.08% |
4,913
-2,570
| -34% | -$148K |
|
169
PUT
Ulta Beauty
ULTA
$21B
| $28.1M | 0.08% |
809
+99
| +14% | +$34.2K |
|
170
CALL
Intel
INTC
$530B
| $28M | 0.08% |
5,846
-143
| -2% | -$7.09K |
|
|
171
CALL
Western Digital
WDC
$189B
| $28M | 0.08% |
7,785
+1,753
| +29% | +$60.1K |
|
172
CALL
Medtronic
MDT
$107B
| $27.8M | 0.08% |
2,852
+1,407
| +97% | +$128K |
|
173
PUT
Starbucks
SBUX
$119B
| $27.7M | 0.08% |
3,300
+721
| +28% | +$56.5K |
|
174
CALL
Palo Alto Networks
PANW
$279B
| $27.6M | 0.08% |
8,136
+3,828
| +89% | +$143K |
|
|
175
CALL
Verizon
VZ
$183B
| $27.5M | 0.08% |
4,818
-1,049
| -18% | -$60.4K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.