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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
CALL
JPMorgan Chase
JPM
$901B
| $223M | 0.22% |
1,435,900
+1,423,794
| +11,761% | +$224M |
|
52
PUT
ARK Space & Defense Innovation ETF
ARKX
$823M
| $219M | 0.21% |
+1,916,200
| New | +$39.3M |
|
53
PUT
Snap
SNAP
$7.67B
| $217M | 0.21% |
3,188,200
+3,170,538
| +17,951% | +$190M |
|
|
54
PUT
Micron Technology
MU
$1.1T
| $215M | 0.21% |
2,534,500
+2,512,131
| +11,230% | +$212M |
|
55
PUT
Citigroup
C
$216B
| $206M | 0.2% |
2,915,000
+2,896,286
| +15,477% | +$214M |
|
56
PUT
PayPal
PYPL
$49.3B
| $206M | 0.2% |
705,200
+696,424
| +7,936% | +$184M |
|
57
CALL
Visa
V
$677B
| $205M | 0.2% |
874,900
+862,996
| +7,250% | +$197M |
|
58
PUT
Roku
ROKU
$21.4B
| $205M | 0.2% |
445,300
+440,415
| +9,016% | +$156M |
|
59
CALL
Intel
INTC
$530B
| $204M | 0.2% |
3,635,700
+3,615,157
| +17,598% | +$212M |
|
60
PUT
Shopify
SHOP
$160B
| $201M | 0.19% |
1,378,000
+1,358,190
| +6,856% | +$167M |
|
|
61
PUT
JPMorgan Chase
JPM
$901B
| $201M | 0.19% |
1,290,700
+1,279,813
| +11,755% | +$201M |
|
62
PUT
Qualcomm
QCOM
$183B
| $192M | 0.19% |
+1,340,300
| New | +$181M |
|
|
63
CALL
PayPal
PYPL
$49.3B
| $190M | 0.18% |
652,000
+644,921
| +9,110% | +$170M |
|
|
64
CALL
Roku
ROKU
$21.4B
| $187M | 0.18% |
407,100
+403,533
| +11,313% | +$143M |
|
65
CALL
GameStop
GME
$9.78B
| $185M | 0.18% |
+3,455,200
| New | +$168M |
|
66
PUT
Zoom
ZM
$26.3B
| $180M | 0.17% |
466,300
+461,732
| +10,108% | +$154M |
|
67
CALL
NIO
NIO
$12B
| $178M | 0.17% |
3,346,000
+3,302,893
| +7,662% | +$132M |
|
68
PUT
Adobe
ADBE
$90.3B
| $178M | 0.17% |
303,200
+300,014
| +9,417% | +$155M |
|
|
69
PUT
Visa
V
$677B
| $177M | 0.17% |
755,100
+743,853
| +6,614% | +$170M |
|
|
70
CALL
Shopify
SHOP
$160B
| $176M | 0.17% |
1,206,000
+1,189,310
| +7,126% | +$147M |
|
71
CALL
Mastercard
MA
$484B
| $175M | 0.17% |
+479,600
| New | +$178M |
|
72
CALL
FedEx
FDX
$73.1B
| $175M | 0.17% |
+585,700
| New | +$174M |
|
|
UWC
73
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $173M | 0.17% |
1,511,000
+1,492,303
| +7,982% | +$171M |
|
74
CALL
Airbnb
ABNB
$86B
| $171M | 0.17% |
1,119,700
+1,116,799
| +38,497% | +$175M |
|
75
CALL
Walmart Inc
WMT
$878B
| $169M | 0.16% |
+3,598,500
| New | +$168M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.