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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
CALL
Intel
INTC
$526B
| $24.7M | 0.08% |
5,223
+291
| +6% | +$14.2K |
|
|
177
Citigroup
C
$223B
| $24.6M | 0.08% |
343,216
+326,477
| +1,950% | +$23.1M |
|
178
PUT
Wayfair
W
$11.3B
| $24.4M | 0.08% |
1,650
+332
| +25% | +$42.2K |
|
179
PUT
Northrop Grumman
NOC
$75.1B
| $24.3M | 0.08% |
767
+197
| +35% | +$60K |
|
180
PUT
SLB Ltd
SLB
$71.1B
| $24.1M | 0.08% |
3,952
+359
| +10% | +$23.1K |
|
181
CALL
RTX Corp
RTX
$263B
| $23.9M | 0.08% |
2,717
-919
| -25% | -$77.2K |
|
182
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.62B
| $23.3M | 0.08% |
28,210
+7,220
| +34% | +$112K |
|
183
Baidu
BIDU
$36.7B
| $23.3M | 0.07% |
101,716
+55,278
| +119% | +$13M |
|
184
PUT
JD.com
JD
$40.8B
| $23.2M | 0.07% |
8,905
+1,599
| +22% | +$52.4K |
|
|
AABA
185
CALL
DELISTED
Altaba Inc
AABA
| $23.2M | 0.07% |
3,409
+1,873
| +122% | +$132K |
|
186
PUT
Deere & Co
DE
$164B
| $22.8M | 0.07% |
1,519
-1,829
| -55% | -$263K |
|
187
CALL
DuPont de Nemours
DD
$19B
| $22.8M | 0.07% |
1,399
+190
| +16% | +$32.7K |
|
188
PUT
United Rentals
URI
$64.7B
| $22.7M | 0.07% |
1,387
+592
| +74% | +$92.1K |
|
189
CALL
United Airlines
UAL
$38.2B
| $22.4M | 0.07% |
2,510
+217
| +9% | +$17.9K |
|
190
PUT
Philip Morris
PM
$303B
| $22.3M | 0.07% |
2,739
+915
| +50% | +$75.1K |
|
191
PUT
Spotify
SPOT
$98.7B
| $22.2M | 0.07% |
1,228
+482
| +65% | +$88.4K |
|
|
XYZ
192
Block Inc
XYZ
$46.3B
| $22M | 0.07% |
222,579
+42,917
| +24% | +$3.31M |
|
193
CALL
American Airlines Group
AAL
$10.1B
| $21.8M | 0.07% |
5,282
+67
| +1% | +$2.62K |
|
|
RTN
194
CALL
DELISTED
Raytheon Company
RTN
| $21.7M | 0.07% |
1,050
-125
| -11% | -$24.9K |
|
|
VXX
195
PUT
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $21.7M | 0.07% |
8,128
-5,047
| -38% | -$152K |
|
|
ATVI
196
CALL
DELISTED
Activision Blizzard
ATVI
| $21.6M | 0.07% |
2,592
+766
| +42% | +$58.1K |
|
|
197
PUT
United Airlines
UAL
$38.2B
| $21.5M | 0.07% |
2,410
+742
| +44% | +$61.2K |
|
198
iShares Russell 2000 ETF
IWM
$81.8B
| $21.4M | 0.07% |
+127,252
| New | +$21.5M |
|
199
CALL
Eli Lilly
LLY
$1.04T
| $21.4M | 0.07% |
1,995
+342
| +21% | +$34.2K |
|
200
CALL
AT&T
T
$159B
| $21.4M | 0.07% |
8,431
+258
| +3% | +$6.32K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.