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 | |
|---|---|---|---|---|---|---|
176
PUT
Palo Alto Networks
PANW
$274B
| $20.9M | 0.08% |
6,114
+84
| +1% | +$2.8K |
|
177
PUT
Shopify
SHOP
$153B
| $20.9M | 0.08% |
14,300
+4,670
| +48% | +$66.1K |
|
178
PUT
Visa
V
$676B
| $20.8M | 0.08% |
1,573
-1,905
| -55% | -$245K |
|
179
CALL
Spotify
SPOT
$98.4B
| $20.7M | 0.08% |
+1,233
| New | +$197K |
|
180
CALL
AutoZone
AZO
$49B
| $20.2M | 0.08% |
301
+17
| +6% | +$11K |
|
181
CALL
DuPont de Nemours
DD
$19B
| $20.2M | 0.08% |
1,209
+614
| +103% | +$103K |
|
182
PUT
UnitedHealth
UNH
$395B
| $20.1M | 0.08% |
821
-1,664
| -67% | -$400K |
|
183
PUT
Kraft Heinz
KHC
$30.8B
| $19.9M | 0.08% |
3,162
+513
| +19% | +$30.4K |
|
184
CALL
Valero Energy
VLO
$92.2B
| $19.9M | 0.08% |
1,792
-642
| -26% | -$72K |
|
185
CALL
AT&T
T
$158B
| $19.8M | 0.08% |
8,173
+3,241
| +66% | +$81.3K |
|
186
CALL
American Airlines Group
AAL
$10.1B
| $19.8M | 0.08% |
5,215
+2,526
| +94% | +$111K |
|
187
Caterpillar
CAT
$415B
| $19.7M | 0.08% |
145,200
+84,482
| +139% | +$12.6M |
|
188
PUT
American Tower
AMT
$77.2B
| $19.7M | 0.08% |
1,366
+288
| +27% | +$40K |
|
|
189
PUT
AutoZone
AZO
$49B
| $19.7M | 0.08% |
293
-55
| -16% | -$35.5K |
|
190
CALL
Merck
MRK
$317B
| $19.3M | 0.08% |
3,328
-2,285
| -41% | -$129K |
|
191
PUT
Honeywell
HON
$74.2B
| $19.1M | 0.07% |
1,466
+139
| +10% | +$18.5K |
|
|
RHT
192
PUT
DELISTED
Red Hat Inc
RHT
| $19.1M | 0.07% |
1,419
+128
| +10% | +$20.6K |
|
193
PUT
Procter & Gamble
PG
$350B
| $19.1M | 0.07% |
2,442
-181
| -7% | -$13.6K |
|
194
PUT
Starbucks
SBUX
$119B
| $19M | 0.07% |
3,894
+2,175
| +127% | +$123K |
|
195
PUT
Lockheed Martin
LMT
$119B
| $18.6M | 0.07% |
629
+39
| +7% | +$12.6K |
|
|
196
CALL
Honeywell
HON
$74.2B
| $18.5M | 0.07% |
1,425
+422
| +42% | +$56.1K |
|
197
CALL
Biogen
BIIB
$29.8B
| $18.5M | 0.07% |
638
-63
| -9% | -$17.7K |
|
198
CALL
American Express
AXP
$237B
| $18.5M | 0.07% |
1,887
+951
| +102% | +$93.5K |
|
199
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.64B
| $18.5M | 0.07% |
20,990
+6,930
| +49% | +$90.1K |
|
200
CALL
Cisco
CSCO
$445B
| $18.2M | 0.07% |
4,223
-1,896
| -31% | -$82.8K |
|
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.