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 | |
|---|---|---|---|---|---|---|
76
CALL
Citigroup
C
$223B
| $169M | 0.16% |
2,390,800
+2,377,299
| +17,608% | +$176M |
|
77
CALL
JD.com
JD
$41.1B
| $165M | 0.16% |
2,061,200
+2,050,949
| +20,007% | +$154M |
|
78
PUT
Goldman Sachs
GS
$320B
| $162M | 0.16% |
427,800
+422,800
| +8,456% | +$151M |
|
79
PUT
Mastercard
MA
$476B
| $162M | 0.16% |
+444,400
| New | +$165M |
|
80
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $162M | 0.16% |
1,864,300
+1,840,919
| +7,874% | +$276M |
|
81
PUT
FedEx
FDX
$73.1B
| $161M | 0.16% |
+540,100
| New | +$160M |
|
82
CALL
Nike
NKE
$63.7B
| $158M | 0.15% |
1,021,900
+1,017,268
| +21,962% | +$137M |
|
|
PARA
83
CALL
DELISTED
Paramount Global Class B
PARA
| $155M | 0.15% |
3,437,800
+3,415,171
| +15,092% | +$141M |
|
84
PUT
Walmart Inc
WMT
$878B
| $154M | 0.15% |
+3,271,200
| New | +$152M |
|
85
PUT
Bank of America
BAC
$430B
| $153M | 0.15% |
3,720,000
+3,698,423
| +17,141% | +$152M |
|
86
PUT
Chipotle Mexican Grill
CMG
$42.7B
| $151M | 0.15% |
+4,870,000
| New | +$139M |
|
87
CALL
Qualcomm
QCOM
$183B
| $150M | 0.15% |
+1,052,500
| New | +$142M |
|
88
PUT
Intel
INTC
$530B
| $150M | 0.14% |
2,667,400
+2,645,775
| +12,235% | +$155M |
|
89
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $149M | 0.14% |
1,898,800
+1,842,904
| +3,297% | +$118M |
|
90
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $147M | 0.14% |
3,443,600
+3,402,070
| +8,192% | +$89.6M |
|
91
PUT
Coinbase
COIN
$46.3B
| $143M | 0.14% |
+562,900
| New | +$146M |
|
92
PUT
Broadcom
AVGO
$1.84T
| $139M | 0.13% |
+2,921,000
| New | +$135M |
|
93
CALL
Adobe
ADBE
$90.3B
| $139M | 0.13% |
237,400
+234,397
| +7,805% | +$121M |
|
|
UWC
94
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $139M | 0.13% |
1,144,100
+1,134,991
| +12,460% | +$137M |
|
95
CALL
Zoom
ZM
$26.3B
| $138M | 0.13% |
356,200
+352,022
| +8,426% | +$117M |
|
96
PUT
Moderna
MRNA
$23.7B
| $133M | 0.13% |
567,700
+564,063
| +15,509% | +$101M |
|
97
CALL
Costco
COST
$412B
| $132M | 0.13% |
+334,700
| New | +$127M |
|
|
TWTR
98
CALL
DELISTED
Twitter, Inc.
TWTR
| $128M | 0.12% |
+1,955,200
| New | +$120M |
|
99
PUT
TSMC
TSM
$2.2T
| $128M | 0.12% |
1,063,500
+1,053,047
| +10,074% | +$123M |
|
100
PUT
Uber
UBER
$146B
| $127M | 0.12% |
2,534,300
+2,521,960
| +20,437% | +$132M |
|
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.