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 | |
|---|---|---|---|---|---|---|
|
VXX
101
CALL
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $44.1M | 0.14% |
16,547
-482
| -3% | -$14.5K |
|
102
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $43.3M | 0.14% |
47,650
+500
| +1% | +$4.76K |
|
103
CALL
Union Pacific
UNP
$176B
| $41.8M | 0.13% |
2,569
+658
| +34% | +$99.1K |
|
104
PUT
Qualcomm
QCOM
$183B
| $41.7M | 0.13% |
5,785
-131
| -2% | -$8.62K |
|
105
CALL
Nike
NKE
$63.7B
| $41.4M | 0.13% |
4,891
+1,749
| +56% | +$140K |
|
106
CALL
AbbVie
ABBV
$448B
| $41.3M | 0.13% |
4,362
-313
| -7% | -$29.7K |
|
|
UCD
107
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $41.1M | 0.13% |
9,751
-183
| -2% | -$772K |
|
108
PUT
Wynn Resorts
WYNN
$9.93B
| $40.6M | 0.13% |
3,195
+1,353
| +73% | +$201K |
|
109
CALL
Caterpillar
CAT
$410B
| $40.6M | 0.13% |
2,660
-984
| -27% | -$139K |
|
|
CELG
110
CALL
DELISTED
Celgene Corp
CELG
| $38.6M | 0.12% |
4,314
-121
| -3% | -$10.7K |
|
111
CALL
Amgen
AMGN
$198B
| $38.4M | 0.12% |
1,853
+606
| +49% | +$119K |
|
112
PUT
Walmart Inc
WMT
$878B
| $37.7M | 0.12% |
12,045
+45
| +0.4% | +$1.38K |
|
113
Netflix
NFLX
$286B
| $37.3M | 0.12% |
997,240
+99,710
| +11% | +$3.62M |
|
114
CALL
PayPal
PYPL
$49.3B
| $37.2M | 0.12% |
4,239
-1,181
| -22% | -$104K |
|
115
PUT
Valero Energy
VLO
$93.5B
| $36.6M | 0.12% |
3,217
+180
| +6% | +$20.4K |
|
116
PUT
NXP Semiconductors
NXPI
$67.5B
| $36M | 0.12% |
4,211
-3,593
| -46% | -$345K |
|
|
TWTR
117
PUT
DELISTED
Twitter, Inc.
TWTR
| $35.9M | 0.12% |
12,610
+3,912
| +45% | +$138K |
|
118
PUT
lululemon athletica
LULU
$13.2B
| $35.2M | 0.11% |
2,168
+228
| +12% | +$31.3K |
|
|
ABMD
119
PUT
DELISTED
Abiomed Inc
ABMD
| $35M | 0.11% |
778
+688
| +764% | +$271K |
|
|
120
PUT
Amgen
AMGN
$198B
| $34.9M | 0.11% |
1,682
+536
| +47% | +$106K |
|
121
CALL
Target
TGT
$63.4B
| $34.6M | 0.11% |
3,918
-89
| -2% | -$7.4K |
|
122
CALL
Gilead Sciences
GILD
$165B
| $34.5M | 0.11% |
4,473
+1,130
| +34% | +$85.3K |
|
|
RHT
123
PUT
DELISTED
Red Hat Inc
RHT
| $34.4M | 0.11% |
2,526
+1,107
| +78% | +$158K |
|
124
CALL
PepsiCo
PEP
$184B
| $34.3M | 0.11% |
3,066
+21
| +0.7% | +$2.38K |
|
125
PUT
Blackrock
BLK
$163B
| $34.2M | 0.11% |
726
+202
| +39% | +$98.2K |
|
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.