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 | |
|---|---|---|---|---|---|---|
201
Alphabet (Google) Class A
GOOGL
$4.25T
| $18M | 0.07% |
318,340
-38,620
| -11% | -$2.1M |
|
|
WBA
202
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $17.9M | 0.07% |
2,987
+767
| +35% | +$49.4K |
|
203
CALL
Palo Alto Networks
PANW
$273B
| $17.7M | 0.07% |
5,178
-186
| -3% | -$6.2K |
|
204
PUT
Comcast
CMCSA
$85B
| $17.6M | 0.07% |
5,366
+2,257
| +73% | +$73.5K |
|
205
PUT
Northrop Grumman
NOC
$75.2B
| $17.5M | 0.07% |
570
-53
| -9% | -$17.5K |
|
|
SHNY
206
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $17.5M | 0.07% |
5,170
+107
| +2% | +$854 |
|
207
CALL
NetEase
NTES
$77.2B
| $17.3M | 0.07% |
3,420
+335
| +11% | +$17.1K |
|
208
PUT
PepsiCo
PEP
$185B
| $17.1M | 0.07% |
1,574
+1,082
| +220% | +$112K |
|
209
PUT
Lowe's Companies
LOW
$114B
| $17.1M | 0.07% |
1,788
-1,093
| -38% | -$98.9K |
|
210
PUT
T-Mobile US
TMUS
$206B
| $16.9M | 0.07% |
2,829
+405
| +17% | +$24K |
|
211
PUT
CVS Health
CVS
$140B
| $16.8M | 0.07% |
2,617
+724
| +38% | +$47.7K |
|
212
CALL
SLB Ltd
SLB
$71B
| $16.6M | 0.07% |
2,480
-50
| -2% | -$3.43K |
|
213
CALL
Morgan Stanley
MS
$344B
| $16.6M | 0.06% |
3,494
+1,827
| +110% | +$95.5K |
|
214
PUT
Chevron
CVX
$383B
| $16.5M | 0.06% |
1,309
-601
| -31% | -$74.6K |
|
215
PUT
Nutanix
NTNX
$14.4B
| $16.4M | 0.06% |
3,187
+2,566
| +413% | +$141K |
|
216
CALL
Occidental Petroleum
OXY
$57B
| $16.3M | 0.06% |
1,947
+721
| +59% | +$57.6K |
|
|
217
Alphabet (Google) Class C
GOOG
$4.24T
| $16.3M | 0.06% |
+291,860
| New | +$15.8M |
|
218
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $16.2M | 0.06% |
3,928
-6,050
| -61% | -$310K |
|
219
CALL
United Airlines
UAL
$38.4B
| $16M | 0.06% |
2,293
-182
| -7% | -$12.6K |
|
220
CALL
General Motors
GM
$74.7B
| $15.9M | 0.06% |
4,039
-1,955
| -33% | -$77K |
|
221
CALL
Automatic Data Processing
ADP
$97.2B
| $15.9M | 0.06% |
1,184
+301
| +34% | +$38.1K |
|
222
PUT
United Parcel Service
UPS
$99.1B
| $15.8M | 0.06% |
1,486
-201
| -12% | -$22.6K |
|
223
CALL
Western Digital
WDC
$194B
| $15.8M | 0.06% |
2,695
-172
| -6% | -$10.9K |
|
224
Meta Platforms (Facebook)
META
$1.6T
| $15.7M | 0.06% |
80,705
-17,166
| -18% | -$3.1M |
|
225
CALL
Colgate-Palmolive
CL
$73.5B
| $15.7M | 0.06% |
2,419
+1,243
| +106% | +$81.3K |
|
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.