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 | |
|---|---|---|---|---|---|---|
951
PUT
Parker-Hannifin
PH
$124B
| $6.69M | 0.01% |
21,800
+21,763
| +58,819% | +$6.74M |
|
952
PUT
Floor & Decor
FND
$5.73B
| $6.69M | 0.01% |
63,300
+63,278
| +287,627% | +$6.57M |
|
953
CALL
Vroom Inc
VRM
$38.1M
| $6.69M | 0.01% |
1,998
+1,988
| +19,880% | +$6.76M |
|
954
CALL
Suncor Energy
SU
$78.4B
| $6.68M | 0.01% |
+278,900
| New | +$6.4M |
|
955
CALL
AB InBev
BUD
$155B
| $6.68M | 0.01% |
92,800
+92,047
| +12,224% | +$6.71M |
|
956
CALL
United Parks & Resorts
PRKS
$2.08B
| $6.68M | 0.01% |
+133,700
| New | +$7.1M |
|
957
Expedia Group
EXPE
$30.9B
| $6.66M | 0.01% |
40,665
+39,120
| +2,532% | +$6.71M |
|
958
PUT
Truist Financial
TFC
$62.5B
| $6.63M | 0.01% |
119,568
+117,968
| +7,373% | +$6.93M |
|
959
PUT
Tractor Supply
TSCO
$15.9B
| $6.62M | 0.01% |
178,000
+176,230
| +9,956% | +$6.46M |
|
|
JWN
960
CALL
DELISTED
Nordstrom
JWN
| $6.62M | 0.01% |
180,900
+179,366
| +11,693% | +$6.55M |
|
961
PUT
Aptiv
APTV
$11.9B
| $6.61M | 0.01% |
42,000
+41,150
| +4,841% | +$6.03M |
|
962
CALL
GrowGeneration
GRWG
$83.5M
| $6.6M | 0.01% |
137,300
+136,403
| +15,207% | +$5.97M |
|
963
PUT
UiPath
PATH
$5.28B
| $6.6M | 0.01% |
+97,200
| New | +$7.13M |
|
964
PUT
Bloom Energy
BE
$61.8B
| $6.59M | 0.01% |
245,300
+243,398
| +12,797% | +$5.9M |
|
|
CTXS
965
PUT
DELISTED
Citrix Systems Inc
CTXS
| $6.59M | 0.01% |
56,200
+56,046
| +36,394% | +$6.98M |
|
966
iShares Expanded Tech-Software Sector ETF
IGV
$12.9B
| $6.58M | 0.01% |
84,335
-15,135
| -15% | -$1.1M |
|
967
PUT
Linde
LIN
$234B
| $6.56M | 0.01% |
22,700
+22,446
| +8,837% | +$6.54M |
|
968
Bristol-Myers Squibb
BMY
$126B
| $6.56M | 0.01% |
98,167
+15,427
| +19% | +$1.01M |
|
969
PUT
Albemarle
ALB
$13.8B
| $6.54M | 0.01% |
38,800
+37,950
| +4,465% | +$6.12M |
|
970
PUT
Cboe Global Markets
CBOE
$29.8B
| $6.52M | 0.01% |
+54,800
| New | +$6.01M |
|
971
Tencent Music
TME
$14.3B
| $6.51M | 0.01% |
420,355
+177,083
| +73% | +$2.93M |
|
972
Shopify
SHOP
$145B
| $6.49M | 0.01% |
44,450
-65,620
| -60% | -$8.09M |
|
973
Take-Two Interactive
TTWO
$42.7B
| $6.49M | 0.01% |
36,687
-3,956
| -10% | -$702K |
|
974
PUT
Fair Isaac
FICO
$28B
| $6.48M | 0.01% |
12,900
+12,851
| +26,227% | +$6.5M |
|
|
DQ
975
PUT
Daqo New Energy
DQ
$806M
| $6.48M | 0.01% |
99,700
+99,288
| +24,099% | +$7.14M |
|
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.