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 | |
|---|---|---|---|---|---|---|
351
PUT
Virgin Galactic
SPCE
$343M
| $28.5M | 0.03% |
30,950
+30,856
| +32,826% | +$17.5M |
|
352
CALL
Vale
VALE
$63.2B
| $28.3M | 0.03% |
1,241,200
+1,229,501
| +10,509% | +$25.7M |
|
|
LOGC
353
PUT
DELISTED
ContextLogic
LOGC
| $28.3M | 0.03% |
71,610
+71,555
| +130,100% | +$25.4M |
|
354
PUT
Philip Morris
PM
$303B
| $28.2M | 0.03% |
284,600
+282,077
| +11,180% | +$27.1M |
|
355
PUT
Okta
OKTA
$23.8B
| $28.2M | 0.03% |
+115,200
| New | +$27.8M |
|
356
PUT
Southwest Airlines
LUV
$23.3B
| $28M | 0.03% |
527,700
+522,857
| +10,796% | +$31.3M |
|
357
CALL
eBay
EBAY
$49.3B
| $28M | 0.03% |
398,200
+395,843
| +16,794% | +$24.8M |
|
358
CALL
Cameco
CCJ
$39.4B
| $27.8M | 0.03% |
+1,449,200
| New | +$27.4M |
|
|
COUP
359
CALL
DELISTED
Coupa Software Incorporated
COUP
| $27.6M | 0.03% |
105,200
+104,701
| +20,982% | +$25.9M |
|
360
PUT
Electronic Arts
EA
$52.4B
| $27.3M | 0.03% |
+190,000
| New | +$27M |
|
361
CALL
Riot Platforms
RIOT
$8.84B
| $27.3M | 0.03% |
724,400
+715,828
| +8,351% | +$25.6M |
|
362
CALL
Cleveland-Cliffs
CLF
$5.39B
| $27.2M | 0.03% |
1,262,800
+1,257,279
| +22,773% | +$24.8M |
|
363
PUT
Marvell Technology
MRVL
$189B
| $27.1M | 0.03% |
+465,200
| New | +$22.7M |
|
364
PUT
Dow Inc
DOW
$22.5B
| $27.1M | 0.03% |
428,400
+425,077
| +12,792% | +$28.1M |
|
365
CALL
Spotify
SPOT
$97.5B
| $27M | 0.03% |
98,100
+97,425
| +14,433% | +$24.7M |
|
366
Intuitive Surgical
ISRG
$121B
| $26.9M | 0.03% |
87,657
+63,201
| +258% | +$17.7M |
|
367
CALL
Deere & Co
DE
$164B
| $26.7M | 0.03% |
75,700
+74,718
| +7,609% | +$27.3M |
|
368
PUT
Illumina
ILMN
$28.9B
| $26.6M | 0.03% |
57,876
+57,585
| +19,789% | +$23.2M |
|
369
PUT
Elevance Health
ELV
$84.4B
| $26.3M | 0.03% |
68,800
+68,009
| +8,598% | +$26M |
|
|
RDS.A
370
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $26.2M | 0.03% |
655,900
+653,155
| +23,794% | +$26M |
|
371
PUT
Marriott International
MAR
$97.5B
| $26.1M | 0.03% |
191,000
+188,836
| +8,726% | +$27.2M |
|
372
CALL
Charter Communications
CHTR
$15.9B
| $26M | 0.03% |
+36,000
| New | +$24.2M |
|
373
CALL
Darden Restaurants
DRI
$22.2B
| $25.9M | 0.03% |
177,700
+176,927
| +22,888% | +$24.9M |
|
374
CALL
Amgen
AMGN
$198B
| $25.9M | 0.03% |
+106,200
| New | +$26.1M |
|
375
PUT
FuboTV Inc
FUBO
$265M
| $25.8M | 0.02% |
66,967
+66,571
| +16,811% | +$19M |
|
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.