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 | |
|---|---|---|---|---|---|---|
51
PUT
Intuitive Surgical
ISRG
$124B
| $78.3M | 0.25% |
4,092
-687
| -14% | -$122K |
|
52
PUT
Caterpillar
CAT
$410B
| $74.3M | 0.24% |
4,872
-74
| -1% | -$10.5K |
|
|
53
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $74.2M | 0.24% |
3,465
-585
| -14% | -$120K |
|
54
CALL
Broadcom
AVGO
$1.84T
| $73.3M | 0.24% |
29,690
+8,010
| +37% | +$180K |
|
|
55
Meta Platforms (Facebook)
META
$1.63T
| $70.7M | 0.23% |
429,889
+349,184
| +433% | +$63.2M |
|
|
56
Invesco QQQ Trust
QQQ
$471B
| $69.1M | 0.22% |
+371,806
| New | +$67.3M |
|
57
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $64.9M | 0.21% |
16,368
+1,352
| +9% | +$71.8K |
|
|
58
CALL
Citigroup
C
$216B
| $64.9M | 0.21% |
9,047
-5,383
| -37% | -$381K |
|
59
PUT
3M
MMM
$89.1B
| $64.3M | 0.21% |
3,649
-94
| -3% | -$16.2K |
|
60
CALL
Home Depot
HD
$332B
| $63.9M | 0.21% |
3,084
+674
| +28% | +$136K |
|
61
PUT
SPDR Gold Trust
GLD
$132B
| $63.3M | 0.2% |
5,611
+1,114
| +25% | +$128K |
|
62
CALL
Advanced Micro Devices
AMD
$888B
| $62.8M | 0.2% |
20,332
+10,190
| +100% | +$230K |
|
63
PUT
Visa
V
$677B
| $61.5M | 0.2% |
4,099
+2,526
| +161% | +$359K |
|
64
PUT
Mastercard
MA
$484B
| $60.9M | 0.2% |
2,734
-904
| -25% | -$189K |
|
65
PUT
Chipotle Mexican Grill
CMG
$42.5B
| $57.2M | 0.18% |
62,950
+11,600
| +23% | +$110K |
|
66
CALL
Walmart Inc
WMT
$878B
| $56.3M | 0.18% |
17,976
-702
| -4% | -$21.5K |
|
67
CALL
Electronic Arts
EA
$52.4B
| $56.2M | 0.18% |
4,665
+2,410
| +107% | +$311K |
|
|
68
PUT
Advanced Micro Devices
AMD
$888B
| $55.5M | 0.18% |
17,977
+15,959
| +791% | +$360K |
|
69
PUT
Roku
ROKU
$21.4B
| $55.5M | 0.18% |
7,597
+5,020
| +195% | +$288K |
|
70
PUT
IBM
IBM
$198B
| $54.6M | 0.18% |
3,779
-421
| -10% | -$58.8K |
|
|
71
CALL
Visa
V
$677B
| $54.6M | 0.18% |
3,636
+770
| +27% | +$109K |
|
72
PUT
Microsoft
MSFT
$2.95T
| $54.1M | 0.17% |
4,726
-2,286
| -33% | -$248K |
|
|
AGN
73
CALL
DELISTED
Allergan plc
AGN
| $53.9M | 0.17% |
2,828
+208
| +8% | +$38.2K |
|
74
PUT
Tilray
TLRY
$522M
| $53.5M | 0.17% |
+372
| New | +$239K |
|
75
CALL
Walt Disney
DIS
$167B
| $53.4M | 0.17% |
4,567
+264
| +6% | +$29.4K |
|
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.