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 | |
|---|---|---|---|---|---|---|
51
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $65.4M | 0.26% |
11,898
-154
| -1% | -$3.45K |
|
|
TWTR
52
CALL
DELISTED
Twitter, Inc.
TWTR
| $63.5M | 0.25% |
14,534
+7,355
| +102% | +$258K |
|
|
VXX
53
CALL
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $63M | 0.25% |
17,029
-2,516
| -13% | -$97.3K |
|
54
PUT
Goldman Sachs
GS
$311B
| $61.6M | 0.24% |
2,795
-108
| -4% | -$25.8K |
|
55
PUT
3M
MMM
$89.1B
| $61.6M | 0.24% |
3,743
+465
| +14% | +$79.4K |
|
56
CALL
IBM
IBM
$198B
| $60.3M | 0.24% |
4,517
-323
| -7% | -$45K |
|
57
PUT
Adobe
ADBE
$90.3B
| $57.8M | 0.23% |
2,371
+779
| +49% | +$184K |
|
58
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $56.2M | 0.22% |
15,016
+1,384
| +10% | +$70.8K |
|
|
59
PUT
IBM
IBM
$198B
| $56.1M | 0.22% |
4,200
-378
| -8% | -$52.7K |
|
|
CELG
60
PUT
DELISTED
Celgene Corp
CELG
| $56M | 0.22% |
7,045
+1,886
| +37% | +$157K |
|
61
CALL
ExxonMobil
XOM
$629B
| $55.8M | 0.22% |
6,739
+1,738
| +35% | +$138K |
|
62
CALL
UnitedHealth
UNH
$396B
| $55.5M | 0.22% |
2,262
+1,070
| +90% | +$257K |
|
63
CALL
Salesforce
CRM
$139B
| $54.5M | 0.21% |
3,999
+553
| +16% | +$70.6K |
|
|
XYZ
64
PUT
Block Inc
XYZ
$47.8B
| $54.3M | 0.21% |
8,816
+499
| +6% | +$27.4K |
|
|
65
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $54M | 0.21% |
12,668
+2,098
| +20% | +$47K |
|
66
CALL
NXP Semiconductors
NXPI
$67.5B
| $53.8M | 0.21% |
4,923
+4,044
| +460% | +$446K |
|
67
PUT
SPDR Gold Trust
GLD
$132B
| $53.4M | 0.21% |
4,497
-405
| -8% | -$50.1K |
|
68
CALL
Walmart Inc
WMT
$878B
| $53.3M | 0.21% |
18,678
+2,601
| +16% | +$73.9K |
|
|
69
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $52.8M | 0.21% |
2,830
+152
| +6% | +$29.6K |
|
70
CALL
Broadcom
AVGO
$1.84T
| $52.6M | 0.21% |
21,680
-1,160
| -5% | -$28.4K |
|
71
CALL
FedEx
FDX
$73.1B
| $51.1M | 0.2% |
2,252
+568
| +34% | +$141K |
|
72
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $50.9M | 0.2% |
8,938
-6,436
| -42% | -$593K |
|
73
PUT
JPMorgan Chase
JPM
$901B
| $50.4M | 0.2% |
4,851
+646
| +15% | +$70.9K |
|
74
CALL
Caterpillar
CAT
$410B
| $49.4M | 0.19% |
3,644
-633
| -15% | -$94.6K |
|
|
VXX
75
PUT
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $48.7M | 0.19% |
13,175
+147
| +1% | +$5.69K |
|
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.