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 | |
|---|---|---|---|---|---|---|
51
PUT
Adobe
ADBE
$90.3B
| $187M | 0.24% |
3,735
-2,255
| -38% | -$1.09M |
|
52
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $186M | 0.24% |
53,934
-5,448
| -9% | -$288K |
|
53
CALL
Visa
V
$677B
| $177M | 0.23% |
8,097
-690
| -8% | -$141K |
|
|
XYZ
54
CALL
Block Inc
XYZ
$47.8B
| $168M | 0.22% |
7,708
-2,839
| -27% | -$554K |
|
|
55
PUT
Mastercard
MA
$484B
| $168M | 0.22% |
4,697
+999
| +27% | +$332K |
|
|
UWC
56
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $168M | 0.22% |
10,614
+1,208
| +13% | +$19.1M |
|
57
CALL
Salesforce
CRM
$139B
| $167M | 0.22% |
7,526
+1,449
| +24% | +$352K |
|
58
CALL
NIO
NIO
$12B
| $164M | 0.21% |
33,628
+7,681
| +30% | +$297K |
|
59
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $161M | 0.21% |
6,930
+46
| +0.7% | +$10.1K |
|
60
PUT
Zoom
ZM
$26.3B
| $156M | 0.2% |
4,629
-2,641
| -36% | -$1.18M |
|
|
61
CALL
JPMorgan Chase
JPM
$901B
| $156M | 0.2% |
12,545
-3,810
| -23% | -$426K |
|
62
CALL
Walmart Inc
WMT
$878B
| $155M | 0.2% |
32,208
-17,301
| -35% | -$840K |
|
63
PUT
Qualcomm
QCOM
$183B
| $153M | 0.2% |
10,022
+987
| +11% | +$137K |
|
64
PUT
Baidu
BIDU
$36.8B
| $145M | 0.19% |
6,720
+3,389
| +102% | +$503K |
|
|
65
CALL
Adobe
ADBE
$90.3B
| $140M | 0.18% |
2,796
+63
| +2% | +$30.4K |
|
66
PUT
Starbucks
SBUX
$119B
| $140M | 0.18% |
13,064
+2,424
| +23% | +$231K |
|
|
67
CALL
Zoom
ZM
$26.3B
| $139M | 0.18% |
4,128
+164
| +4% | +$73.1K |
|
68
PUT
Booking.com
BKNG
$139B
| $137M | 0.18% |
15,325
+4,050
| +36% | +$313K |
|
69
CALL
PayPal
PYPL
$49.3B
| $133M | 0.17% |
6,511
+1,139
| +21% | +$236K |
|
70
PUT
Broadcom
AVGO
$1.84T
| $128M | 0.17% |
29,170
+3,500
| +14% | +$136K |
|
71
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $127M | 0.16% |
33,711
-2,533
| -7% | -$56K |
|
|
72
PUT
JPMorgan Chase
JPM
$901B
| $125M | 0.16% |
9,940
-5,568
| -36% | -$622K |
|
73
CALL
Intel
INTC
$530B
| $125M | 0.16% |
25,117
-5,379
| -18% | -$263K |
|
74
PUT
Mercado Libre
MELI
$92.4B
| $123M | 0.16% |
737
+259
| +54% | +$365K |
|
75
PUT
JD.com
JD
$41.1B
| $123M | 0.16% |
13,943
+1,509
| +12% | +$126K |
|
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.