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 | |
|---|---|---|---|---|---|---|
201
CALL
Wells Fargo
WFC
$263B
| $21.2M | 0.07% |
4,036
-776
| -16% | -$44.3K |
|
202
CALL
Cigna
CI
$76.8B
| $21M | 0.07% |
1,009
+278
| +38% | +$51.5K |
|
|
AMRN
203
CALL
Amarin Corp
AMRN
$291M
| $20.8M | 0.07% |
638
+617
| +2,938% | +$46.6K |
|
204
CALL
Marathon Petroleum
MPC
$94.3B
| $20.6M | 0.07% |
2,570
+1,415
| +123% | +$112K |
|
|
RDS.A
205
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $20.5M | 0.07% |
2,984
+1,587
| +114% | +$106K |
|
206
CALL
Kraft Heinz
KHC
$30.9B
| $20.4M | 0.07% |
3,695
+1,594
| +76% | +$95.2K |
|
207
PUT
Palo Alto Networks
PANW
$273B
| $20M | 0.06% |
5,340
-774
| -13% | -$28.2K |
|
208
PUT
ConocoPhillips
COP
$145B
| $19.9M | 0.06% |
2,574
+352
| +16% | +$25.4K |
|
209
PUT
Lockheed Martin
LMT
$119B
| $19.9M | 0.06% |
574
-55
| -9% | -$17.7K |
|
210
CALL
Roku
ROKU
$21.3B
| $19.7M | 0.06% |
2,703
+204
| +8% | +$11.7K |
|
211
PUT
Illumina
ILMN
$29.1B
| $19.7M | 0.06% |
551
+127
| +30% | +$40.7K |
|
212
PUT
T-Mobile US
TMUS
$207B
| $19.1M | 0.06% |
2,726
-103
| -4% | -$6.62K |
|
213
PUT
Humana
HUM
$48.1B
| $19M | 0.06% |
562
+311
| +124% | +$101K |
|
214
CALL
Align Technology
ALGN
$12.4B
| $18.9M | 0.06% |
482
+77
| +19% | +$28.4K |
|
215
PUT
Oracle
ORCL
$364B
| $18.6M | 0.06% |
3,603
-1,384
| -28% | -$67.2K |
|
216
CALL
Southwest Airlines
LUV
$23.3B
| $18.5M | 0.06% |
2,962
-110
| -4% | -$6.43K |
|
217
PUT
W.W. Grainger
GWW
$64B
| $18.3M | 0.06% |
512
+167
| +48% | +$57.5K |
|
218
PUT
Western Digital
WDC
$193B
| $18.3M | 0.06% |
4,133
+224
| +6% | +$11.3K |
|
|
PPLI
219
PUT
People Inc
PPLI
$3.2B
| $18.2M | 0.06% |
4,711
+78
| +2% | +$2.53K |
|
220
PUT
Las Vegas Sands
LVS
$30.5B
| $18.2M | 0.06% |
3,068
+1,305
| +74% | +$87.6K |
|
221
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$748M
| $18M | 0.06% |
3,416
-859
| -20% | -$20.1K |
|
222
PUT
Starbucks
SBUX
$119B
| $17.9M | 0.06% |
3,158
-736
| -19% | -$38.9K |
|
223
CALL
AutoZone
AZO
$49B
| $17.8M | 0.06% |
230
-71
| -24% | -$52.3K |
|
|
224
PUT
Wells Fargo
WFC
$263B
| $17.8M | 0.06% |
3,383
-2,139
| -39% | -$122K |
|
225
CALL
Merck
MRK
$317B
| $17.7M | 0.06% |
2,614
-714
| -21% | -$45.5K |
|
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.