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 | |
|---|---|---|---|---|---|---|
2826
Green Dot
GDOT
$753M
| $1.22M | ﹤0.01% |
26,049
+17,563
| +207% | +$783K |
|
|
SRNG
2827
CALL
DELISTED
Soaring Eagle Acquisition Corp. Class A Ordinary Share
SRNG
| $1.22M | ﹤0.01% |
+117,600
| New | +$1.18M |
|
2828
iShares Core S&P 500 ETF
IVV
$876B
| $1.22M | ﹤0.01% |
2,830
+2,176
| +333% | +$912K |
|
|
LDL
2829
PUT
DELISTED
Lydall, Inc.
LDL
| $1.22M | ﹤0.01% |
20,100
+20,075
| +80,300% | +$772K |
|
|
AGEN
2830
CALL
Agenus
AGEN
$249M
| $1.22M | ﹤0.01% |
11,280
+11,237
| +26,133% | +$843K |
|
2831
PUT
Keurig Dr Pepper
KDP
$40.4B
| $1.22M | ﹤0.01% |
34,500
+33,046
| +2,273% | +$1.18M |
|
2832
PUT
New Fortress Energy
NFE
$101M
| $1.22M | ﹤0.01% |
32,100
+31,672
| +7,400% | +$1.35M |
|
2833
PUT
Artisan Partners
APAM
$2.79B
| $1.21M | ﹤0.01% |
23,900
+23,868
| +74,588% | +$1.25M |
|
2834
ZIM Integrated Shipping Services
ZIM
$3B
| $1.21M | ﹤0.01% |
+26,978
| New | +$1.04M |
|
|
CLVR
2835
CALL
DELISTED
Clever Leaves Holdings Inc. Common Shares
CLVR
| $1.21M | ﹤0.01% |
3,983
+3,897
| +4,531% | +$1.2M |
|
2836
CALL
ADT
ADT
$5.16B
| $1.21M | ﹤0.01% |
112,300
+111,784
| +21,664% | +$1.12M |
|
|
CLDR
2837
PUT
DELISTED
Cloudera, Inc.
CLDR
| $1.21M | ﹤0.01% |
+76,300
| New | +$1.04M |
|
|
MITT
2838
PUT
TPG Mortgage Investment Trust
MITT
$230M
| $1.21M | ﹤0.01% |
+94,333
| New | +$1.18M |
|
2839
PUT
CNX Resources
CNX
$4.85B
| $1.21M | ﹤0.01% |
88,400
+87,445
| +9,157% | +$1.22M |
|
|
XPOA
2840
CALL
DELISTED
DPCM Capital, Inc.
XPOA
| $1.21M | ﹤0.01% |
122,100
+121,983
| +104,259% | +$1.21M |
|
2841
Walt Disney
DIS
$165B
| $1.2M | ﹤0.01% |
6,855
-17,305
| -72% | -$3.11M |
|
|
SPNS
2842
CALL
DELISTED
Sapiens International
SPNS
| $1.2M | ﹤0.01% |
45,800
+45,156
| +7,012% | +$1.33M |
|
|
PRTY
2843
DELISTED
Party City Holdco Inc.
PRTY
| $1.2M | ﹤0.01% |
129,017
+64,217
| +99% | +$524K |
|
2844
iShares MSCI China A ETF
CNYA
$221M
| $1.2M | ﹤0.01% |
27,116
+14,087
| +108% | +$604K |
|
2845
CALL
Herbalife
HLF
$1.23B
| $1.2M | ﹤0.01% |
22,800
+22,714
| +26,412% | +$1.13M |
|
|
HEXO
2846
CALL
DELISTED
HEXO Corp. Common Shares
HEXO
| $1.2M | ﹤0.01% |
14,814
+14,738
| +19,392% | +$1.28M |
|
2847
iShares US Basic Materials ETF
IYM
$1.16B
| $1.2M | ﹤0.01% |
+9,211
| New | +$1.23M |
|
2848
CALL
Ryman Hospitality Properties
RHP
$8.4B
| $1.2M | ﹤0.01% |
15,200
+15,081
| +12,673% | +$1.17M |
|
2849
GoodRx Holdings
GDRX
$1B
| $1.2M | ﹤0.01% |
33,205
+8,284
| +33% | +$306K |
|
2850
Tapestry
TPR
$28.8B
| $1.19M | ﹤0.01% |
+27,473
| New | +$1.23M |
|
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.