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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
PUT
Citigroup
C
$216B
| $121M | 0.16% |
19,677
-3,154
| -14% | -$160K |
|
|
77
CALL
Mastercard
MA
$484B
| $119M | 0.15% |
3,345
-561
| -14% | -$187K |
|
78
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $119M | 0.15% |
31,169
-4,965
| -14% | -$110K |
|
79
CALL
Baidu
BIDU
$36.8B
| $118M | 0.15% |
5,477
+692
| +14% | +$103K |
|
80
CALL
Johnson & Johnson
JNJ
$599B
| $115M | 0.15% |
7,336
+2,196
| +43% | +$324K |
|
81
PUT
Costco
COST
$412B
| $115M | 0.15% |
3,060
-516
| -14% | -$193K |
|
82
CALL
Booking.com
BKNG
$139B
| $115M | 0.15% |
12,925
-1,700
| -12% | -$131K |
|
83
PUT
Walmart Inc
WMT
$878B
| $108M | 0.14% |
22,530
-13,839
| -38% | -$672K |
|
84
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $106M | 0.14% |
110,090
-102,400
| -48% | -$3.47M |
|
85
CALL
Qualcomm
QCOM
$183B
| $105M | 0.14% |
9,314
+2,641
| +40% | +$368K |
|
|
86
CALL
Costco
COST
$412B
| $102M | 0.13% |
2,696
-1,651
| -38% | -$617K |
|
87
CALL
Goldman Sachs
GS
$320B
| $99.3M | 0.13% |
3,765
+829
| +28% | +$185K |
|
88
CALL
United Parcel Service
UPS
$96.2B
| $99.3M | 0.13% |
+5,895
| New | +$995K |
|
|
UWC
89
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $99M | 0.13% |
6,521
-1,583
| -20% | -$24M |
|
90
PUT
Home Depot
HD
$332B
| $98.6M | 0.13% |
3,711
-774
| -17% | -$213K |
|
|
91
PUT
United Parcel Service
UPS
$96.2B
| $97.9M | 0.13% |
+5,812
| New | +$981K |
|
92
PUT
Intel
INTC
$530B
| $97.2M | 0.13% |
19,502
-7,516
| -28% | -$367K |
|
93
PUT
Lowe's Companies
LOW
$115B
| $96.3M | 0.12% |
6,000
+2,216
| +59% | +$360K |
|
94
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $95.6M | 0.12% |
14,508
-3,966
| -21% | -$122K |
|
|
95
PUT
iShares Silver Trust
SLV
$28.4B
| $95.3M | 0.12% |
38,793
-22,046
| -36% | -$501K |
|
96
PUT
Twilio
TWLO
$31.2B
| $89.4M | 0.12% |
2,641
+924
| +54% | +$289K |
|
97
Tesla
TSLA
$1.42T
| $88.5M | 0.11% |
376,260
-16,647
| -4% | -$2.84M |
|
98
PUT
ServiceNow
NOW
$105B
| $88.2M | 0.11% |
8,010
+890
| +13% | +$92.5K |
|
|
99
PUT
Goldman Sachs
GS
$320B
| $87.7M | 0.11% |
3,324
-523
| -14% | -$116K |
|
100
CALL
United States Oil Fund
USO
$2.31B
| $87.6M | 0.11% |
26,538
-5,925
| -18% | -$176K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.