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 | |
|---|---|---|---|---|---|---|
1551
CALL
Cummins
CMI
$91.7B
| $3.39M | ﹤0.01% |
13,900
+13,665
| +5,815% | +$3.49M |
|
1552
Apple
AAPL
$4.89T
| $3.38M | ﹤0.01% |
24,700
-17,055
| -41% | -$2.21M |
|
1553
Bank of America
BAC
$435B
| $3.38M | ﹤0.01% |
81,877
-65,130
| -44% | -$2.67M |
|
1554
CALL
Fulgent Genetics
FLGT
$559M
| $3.38M | ﹤0.01% |
36,600
+36,104
| +7,279% | +$2.88M |
|
1555
CALL
Cardinal Health
CAH
$53.4B
| $3.37M | ﹤0.01% |
+59,000
| New | +$3.45M |
|
|
IPOF
1556
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $3.37M | ﹤0.01% |
330,078
+31,027
| +10% | +$320K |
|
1557
PUT
Air Products & Chemicals
APD
$66.3B
| $3.37M | ﹤0.01% |
11,700
+11,613
| +13,348% | +$3.41M |
|
1558
PUT
Chemours
CC
$2.59B
| $3.36M | ﹤0.01% |
96,500
+95,493
| +9,483% | +$3.16M |
|
1559
CALL
Harley-Davidson
HOG
$2.68B
| $3.34M | ﹤0.01% |
73,000
+72,288
| +10,153% | +$3.35M |
|
1560
Clean Energy Fuels
CLNE
$447M
| $3.34M | ﹤0.01% |
329,378
+305,933
| +1,305% | +$3.16M |
|
1561
PUT
Hewlett Packard
HPE
$63.2B
| $3.34M | ﹤0.01% |
229,300
+226,883
| +9,387% | +$3.58M |
|
1562
CALL
Consolidated Edison
ED
$41.6B
| $3.34M | ﹤0.01% |
46,600
+46,181
| +11,022% | +$3.54M |
|
1563
lululemon athletica
LULU
$13B
| $3.34M | ﹤0.01% |
9,159
-2,709
| -23% | -$892K |
|
|
BLDP
1564
CALL
Ballard Power Systems
BLDP
$874M
| $3.34M | ﹤0.01% |
184,400
+183,657
| +24,718% | +$3.41M |
|
1565
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $3.34M | ﹤0.01% |
20,500
+20,199
| +6,711% | +$3.41M |
|
|
DEN
1566
CALL
DELISTED
Denbury Inc.
DEN
| $3.34M | ﹤0.01% |
+43,500
| New | +$2.65M |
|
|
BBBY
1567
PUT
Bed Bath & Beyond
BBBY
$473M
| $3.34M | ﹤0.01% |
39,820
+39,418
| +9,805% | +$2.86M |
|
1568
PUT
Zebra Technologies
ZBRA
$12.4B
| $3.33M | ﹤0.01% |
6,300
+6,239
| +10,228% | +$3.11M |
|
1569
CALL
Progyny
PGNY
$2.44B
| $3.33M | ﹤0.01% |
56,500
+56,417
| +67,972% | +$3.17M |
|
|
MCFE
1570
PUT
DELISTED
McAfee Corp. Class A Common Stock
MCFE
| $3.33M | ﹤0.01% |
118,900
+117,190
| +6,853% | +$3M |
|
|
CS
1571
PUT
DELISTED
Credit Suisse Group
CS
| $3.33M | ﹤0.01% |
+317,200
| New | +$3.37M |
|
1572
CALL
Burlington
BURL
$22B
| $3.32M | ﹤0.01% |
+10,300
| New | +$3.28M |
|
|
VTNR
1573
PUT
DELISTED
Vertex Energy, Inc
VTNR
| $3.31M | ﹤0.01% |
250,500
+249,251
| +19,956% | +$1.03M |
|
1574
PUT
GrowGeneration
GRWG
$82.9M
| $3.31M | ﹤0.01% |
68,800
+67,904
| +7,579% | +$2.97M |
|
1575
Blackrock
BLK
$164B
| $3.3M | ﹤0.01% |
3,770
-2,228
| -37% | -$1.88M |
|
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.