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 | |
|---|---|---|---|---|---|---|
6976
CALL
Recon Technology
RCON
$32.6M
| $84K | ﹤0.01% |
+1,078
| New | +$157K |
|
|
SA
6977
Seabridge Gold
SA
$2.89B
| $84K | ﹤0.01% |
4,826
-9,797
| -67% | -$177K |
|
6978
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $84K | ﹤0.01% |
1,600
+1,546
| +2,863% | +$80.2K |
|
6979
Vulcan Materials
VMC
$35.1B
| $84K | ﹤0.01% |
+487
| New | +$87.1K |
|
6980
PUT
Werner Enterprises
WERN
$2.21B
| $84K | ﹤0.01% |
1,900
+1,724
| +980% | +$80.5K |
|
6981
CALL
GeneDx Holdings
WGS
$2.05B
| $84K | ﹤0.01% |
1,815
+1,773
| +4,221% | +$761K |
|
|
6982
GeneDx Holdings
WGS
$2.05B
| $84K | ﹤0.01% |
+182
| New | +$78.1K |
|
|
VRN
6983
DELISTED
Veren
VRN
| $84K | ﹤0.01% |
18,743
-5,647
| -23% | -$23.7K |
|
|
GHL
6984
CALL
DELISTED
Greenhill & Co., Inc.
GHL
| $84K | ﹤0.01% |
5,400
+5,336
| +8,338% | +$88.6K |
|
|
TYME
6985
DELISTED
Tyme Technologies, Inc. Common Stock
TYME
| $84K | ﹤0.01% |
67,052
-73,970
| -52% | -$107K |
|
|
STL
6986
CALL
DELISTED
Sterling Bancorp
STL
| $84K | ﹤0.01% |
3,400
+3,275
| +2,620% | +$82.5K |
|
6987
PUT
Codexis
CDXS
$159M
| $83K | ﹤0.01% |
3,700
+3,665
| +10,471% | +$79.4K |
|
|
CRESY
6988
PUT
Cresud
CRESY
$823M
| $83K | ﹤0.01% |
14,572
+14,496
| +19,074% | +$86.5K |
|
6989
Fidelity MSCI Materials Index ETF
FMAT
$589M
| $83K | ﹤0.01% |
1,814
+479
| +36% | +$22.6K |
|
6990
Hilton Grand Vacations
HGV
$3.64B
| $83K | ﹤0.01% |
+2,010
| New | +$87.3K |
|
6991
PUT
The Joint Corp
JYNT
$119M
| $83K | ﹤0.01% |
+1,000
| New | +$62K |
|
|
LADR
6992
Ladder Capital
LADR
$1.23B
| $83K | ﹤0.01% |
7,237
+1,476
| +26% | +$17.3K |
|
6993
CALL
Manchester United
MANU
$4.04B
| $83K | ﹤0.01% |
5,500
+5,347
| +3,495% | +$85.8K |
|
6994
CALL
Northwest Bancshares
NWBI
$2.3B
| $83K | ﹤0.01% |
6,100
+5,962
| +4,320% | +$84.2K |
|
6995
PUT
E.W. Scripps
SSP
$259M
| $83K | ﹤0.01% |
+4,100
| New | +$85.9K |
|
6996
StepStone Group
STEP
$3.59B
| $83K | ﹤0.01% |
2,414
-12,304
| -84% | -$409K |
|
|
EVA
6997
PUT
DELISTED
Enviva Inc.
EVA
| $83K | ﹤0.01% |
1,600
+1,546
| +2,863% | +$76.2K |
|
|
CBAY
6998
PUT
DELISTED
Cymabay Therapeutics
CBAY
| $83K | ﹤0.01% |
19,100
+19,019
| +23,480% | +$84.3K |
|
|
NM
6999
CALL
DELISTED
Navios Maritime Holdings Inc.
NM
| $83K | ﹤0.01% |
+9,100
| New | +$78.9K |
|
|
EVOP
7000
PUT
DELISTED
EVO Payments, Inc. Class A Common Stock
EVOP
| $83K | ﹤0.01% |
3,000
+2,931
| +4,248% | +$83.6K |
|
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.