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 | |
|---|---|---|---|---|---|---|
|
BZUN
2976
CALL
Baozun
BZUN
$164M
| $1.09M | ﹤0.01% |
30,800
+30,365
| +6,980% | +$1.07M |
|
2977
CALL
Celanese
CE
$4.91B
| $1.09M | ﹤0.01% |
7,200
+7,124
| +9,374% | +$1.13M |
|
2978
National Beverage
FIZZ
$2.93B
| $1.09M | ﹤0.01% |
23,115
+9,829
| +74% | +$477K |
|
2979
CALL
Planet Fitness
PLNT
$4.3B
| $1.09M | ﹤0.01% |
14,500
+13,993
| +2,760% | +$1.11M |
|
2980
CALL
ATI
ATI
$25.8B
| $1.09M | ﹤0.01% |
52,300
+51,738
| +9,206% | +$1.19M |
|
2981
Navios Maritime Partners
NMM
$2.19B
| $1.09M | ﹤0.01% |
36,892
-4,454
| -11% | -$129K |
|
2982
Hydrofarm Holdings
HYFM
$3.19M
| $1.09M | ﹤0.01% |
+1,842
| New | +$1.08M |
|
2983
CALL
SL Green Realty
SLG
$3.82B
| $1.09M | ﹤0.01% |
13,604
+13,403
| +6,668% | +$1.02M |
|
2984
PUT
Conagra Brands
CAG
$7.23B
| $1.09M | ﹤0.01% |
29,900
+29,371
| +5,552% | +$1.1M |
|
|
CTRA
2985
PUT
DELISTED
Coterra Energy
CTRA
| $1.09M | ﹤0.01% |
62,200
+61,473
| +8,456% | +$1.05M |
|
|
NVRO
2986
DELISTED
NEVRO CORP.
NVRO
| $1.09M | ﹤0.01% |
6,554
+5,409
| +472% | +$844K |
|
|
CANO
2987
PUT
DELISTED
Cano Health, Inc.
CANO
| $1.09M | ﹤0.01% |
+898
| New | +$1.21M |
|
|
MGI
2988
DELISTED
MoneyGram International, Inc. New
MGI
| $1.09M | ﹤0.01% |
107,834
-9,861
| -8% | -$83.2K |
|
2989
CALL
Deluxe
DLX
$1.22B
| $1.08M | ﹤0.01% |
22,700
+22,518
| +12,373% | +$1.01M |
|
2990
CALL
CDW
CDW
$17.6B
| $1.08M | ﹤0.01% |
6,200
+6,132
| +9,018% | +$1.06M |
|
2991
Olin
OLN
$2.51B
| $1.08M | ﹤0.01% |
+23,397
| New | +$1.05M |
|
2992
CALL
Fastenal
FAST
$54.3B
| $1.08M | ﹤0.01% |
41,600
+41,388
| +19,523% | +$1.08M |
|
2993
HDFC Bank
HDB
$119B
| $1.08M | ﹤0.01% |
29,576
-6,492
| -18% | -$238K |
|
2994
PUT
Ovid Therapeutics
OVID
$448M
| $1.08M | ﹤0.01% |
276,600
+273,667
| +9,331% | +$1.08M |
|
2995
MSCI
MSCI
$41.5B
| $1.08M | ﹤0.01% |
+2,027
| New | +$966K |
|
|
BBL
2996
PUT
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $1.08M | ﹤0.01% |
18,100
+17,830
| +6,604% | +$1.09M |
|
2997
PUT
Porch Group
PRCH
$1.38B
| $1.08M | ﹤0.01% |
55,700
+55,269
| +12,823% | +$911K |
|
2998
PUT
CVR Partners
UAN
$1.27B
| $1.08M | ﹤0.01% |
17,400
+17,303
| +17,838% | +$969K |
|
2999
PUT
Imperial Oil
IMO
$60.6B
| $1.08M | ﹤0.01% |
35,400
+35,397
| +1,179,900% | +$1.07M |
|
3000
Papa John's
PZZA
$1.02B
| $1.07M | ﹤0.01% |
10,294
+1,018
| +11% | +$98.8K |
|
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.