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 | Miscellaneous | 97.7% |
| 2 | Technology | 0.48% |
| 3 | Consumer Discretionary | 0.39% |
| 4 | Communication Services | 0.28% |
| 5 | Healthcare | 0.27% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
MGI
1501
CALL
DELISTED
MoneyGram International, Inc. New
MGI
| $3.58M | ﹤0.01% |
354,700
+352,033
| +13,200% | +$2.97M |
|
|
SFIX
1502
PUT
Stitch Fix
SFIX
$398M
| $3.57M | ﹤0.01% |
59,200
+58,428
| +7,568% | +$2.99M |
|
|
JWN
1503
DELISTED
Nordstrom
JWN
| $3.57M | ﹤0.01% |
97,573
+61,690
| +172% | +$2.25M |
|
1504
CALL
Sempra
SRE
$55.9B
| $3.56M | ﹤0.01% |
53,800
+53,448
| +15,184% | +$3.66M |
|
1505
CALL
British American Tobacco
BTI
$120B
| $3.56M | ﹤0.01% |
90,600
+90,409
| +47,335% | +$3.54M |
|
1506
CALL
US Foods
USFD
$22.3B
| $3.55M | ﹤0.01% |
92,600
+91,617
| +9,320% | +$3.55M |
|
1507
CALL
Transocean
RIG
$6.6B
| $3.55M | ﹤0.01% |
+784,900
| New | +$2.98M |
|
1508
CALL
Boston Scientific
BSX
$67.7B
| $3.54M | ﹤0.01% |
82,900
+81,658
| +6,575% | +$3.44M |
|
1509
CALL
Teucrium Soybean Fund
SOYB
$47M
| $3.54M | ﹤0.01% |
177,500
+175,995
| +11,694% | +$4.03M |
|
|
UNVR
1510
CALL
DELISTED
Univar Solutions Inc.
UNVR
| $3.51M | ﹤0.01% |
143,900
+142,275
| +8,755% | +$3.56M |
|
1511
CALL
Celsius Holdings
CELH
$7.62B
| $3.5M | ﹤0.01% |
138,000
+137,106
| +15,336% | +$2.79M |
|
1512
CALL
Lamb Weston
LW
$6.77B
| $3.5M | ﹤0.01% |
43,400
+42,923
| +8,999% | +$3.44M |
|
1513
PUT
Toyota
TM
$228B
| $3.5M | ﹤0.01% |
20,000
+19,905
| +20,953% | +$3.27M |
|
1514
PUT
DigitalBridge
DBRG
$2.98B
| $3.5M | ﹤0.01% |
+110,625
| New | +$3.16M |
|
1515
Sysco
SYY
$38.4B
| $3.49M | ﹤0.01% |
44,877
+39,800
| +784% | +$3.21M |
|
1516
PUT
Lucid Motors
LCID
$1.82B
| $3.49M | ﹤0.01% |
75,300
+74,118
| +6,271% | +$16.3M |
|
1517
PUT
Universal Health Services
UHS
$10.2B
| $3.48M | ﹤0.01% |
23,800
+23,586
| +11,021% | +$3.57M |
|
1518
PUT
Quest Diagnostics
DGX
$25.9B
| $3.48M | ﹤0.01% |
26,400
+26,156
| +10,720% | +$3.42M |
|
1519
C3.ai
AI
$1.62B
| $3.48M | ﹤0.01% |
55,674
+30,137
| +118% | +$1.87M |
|
1520
CALL
Viatris
VTRS
$19.2B
| $3.48M | ﹤0.01% |
+243,600
| New | +$3.52M |
|
1521
CALL
Fortinet
FTNT
$112B
| $3.48M | ﹤0.01% |
73,000
+71,830
| +6,139% | +$3.07M |
|
1522
CALL
American Eagle Outfitters
AEO
$2.87B
| $3.48M | ﹤0.01% |
+92,600
| New | +$3.21M |
|
1523
CALL
Canadian Solar
CSIQ
$931M
| $3.48M | ﹤0.01% |
+77,500
| New | +$3.17M |
|
|
LNW
1524
CALL
DELISTED
Light & Wonder
LNW
| $3.47M | ﹤0.01% |
44,800
+44,391
| +10,854% | +$2.73M |
|
1525
CALL
10x Genomics
TXG
$8.16B
| $3.47M | ﹤0.01% |
17,700
+17,681
| +93,058% | +$3.2M |
|
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's Q2 2021 filing shows 2,248 new, 6,668 increased, 1,000 reduced and 1,196 closed positions. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M. The largest sale was Invesco QQQ Trust, an estimated $36.1M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 2,248 new positions and closed 1,196 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.