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 | |
|---|---|---|---|---|---|---|
151
CALL
United Airlines
UAL
$38.1B
| $94M | 0.09% |
1,798,000
+1,784,396
| +13,117% | +$99M |
|
152
PUT
iShares Silver Trust
SLV
$29.1B
| $94M | 0.09% |
+3,881,600
| New | +$96.1M |
|
153
CALL
TSMC
TSM
$2.18T
| $94M | 0.09% |
782,200
+772,016
| +7,581% | +$90.5M |
|
|
SPLK
154
CALL
DELISTED
Splunk Inc
SPLK
| $93.3M | 0.09% |
645,100
+640,432
| +13,720% | +$81.5M |
|
155
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.52B
| $92.1M | 0.09% |
1,743,900
+1,723,700
| +8,533% | +$82.6M |
|
156
CALL
Snowflake
SNOW
$92.3B
| $92.1M | 0.09% |
380,800
+376,659
| +9,096% | +$87.6M |
|
|
DOCU
157
PUT
DocuSign
DOCU
$9.28B
| $91.7M | 0.09% |
328,100
+325,169
| +11,094% | +$72.7M |
|
158
CALL
General Motors
GM
$74.7B
| $90.7M | 0.09% |
1,533,100
+1,518,131
| +10,142% | +$89.2M |
|
159
CALL
Johnson & Johnson
JNJ
$612B
| $90.4M | 0.09% |
549,000
+543,045
| +9,119% | +$89.9M |
|
160
CALL
Uber
UBER
$144B
| $90.3M | 0.09% |
1,802,600
+1,784,530
| +9,876% | +$93.2M |
|
161
PUT
AbbVie
ABBV
$453B
| $89.9M | 0.09% |
798,300
+794,682
| +21,965% | +$89.5M |
|
162
PUT
Deere & Co
DE
$162B
| $89.9M | 0.09% |
254,900
+253,829
| +23,700% | +$92.7M |
|
|
PARA
163
PUT
DELISTED
Paramount Global Class B
PARA
| $89.8M | 0.09% |
1,987,600
+1,964,629
| +8,553% | +$81.1M |
|
164
CALL
Verizon
VZ
$186B
| $89.5M | 0.09% |
1,596,800
+1,585,768
| +14,374% | +$91M |
|
165
CALL
Home Depot
HD
$332B
| $89.3M | 0.09% |
+280,000
| New | +$89.1M |
|
166
CALL
Morgan Stanley
MS
$343B
| $88.2M | 0.09% |
962,058
+956,516
| +17,259% | +$82M |
|
167
CALL
United Parcel Service
UPS
$99.6B
| $86.6M | 0.08% |
416,300
+412,182
| +10,009% | +$82.5M |
|
168
PUT
Teladoc Health
TDOC
$1.66B
| $85.5M | 0.08% |
514,200
+510,388
| +13,389% | +$82.7M |
|
|
169
AMC Entertainment Holdings
AMC
$2.01B
| $85.3M | 0.08% |
150,580
+148,509
| +7,171% | +$39.3M |
|
170
CALL
Lockheed Martin
LMT
$120B
| $85.3M | 0.08% |
225,400
+223,273
| +10,497% | +$85.8M |
|
|
171
PUT
Palantir
PLTR
$305B
| $85M | 0.08% |
+3,225,700
| New | +$74.6M |
|
172
CALL
Sea Limited
SE
$64B
| $84.1M | 0.08% |
306,200
+303,160
| +9,972% | +$76.9M |
|
173
PUT
Novavax
NVAX
$1.33B
| $81.8M | 0.08% |
385,100
+382,374
| +14,027% | +$70.1M |
|
174
CALL
DraftKings
DKNG
$11.4B
| $81.7M | 0.08% |
1,565,900
+1,554,426
| +13,547% | +$82M |
|
175
PUT
American Airlines Group
AAL
$9.95B
| $81.3M | 0.08% |
3,832,100
+3,797,708
| +11,042% | +$85.9M |
|
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.