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 | |
|---|---|---|---|---|---|---|
|
CNH
5876
CALL
CNH Industrial
CNH
$12.7B
| $177K | ﹤0.01% |
12,179
+11,934
| +4,871% | +$170K |
|
5877
PUT
Albertsons Companies
ACI
$5.62B
| $176K | ﹤0.01% |
9,000
+7,871
| +697% | +$153K |
|
5878
PUT
Cohu
COHU
$2.26B
| $176K | ﹤0.01% |
4,800
+4,753
| +10,113% | +$189K |
|
5879
Fulton Financial
FULT
$4.66B
| $176K | ﹤0.01% |
+11,197
| New | +$191K |
|
5880
PUT
M/I Homes
MHO
$3.74B
| $176K | ﹤0.01% |
+3,000
| New | +$194K |
|
5881
CALL
Orthofix Medical
OFIX
$477M
| $176K | ﹤0.01% |
+4,400
| New | +$186K |
|
5882
CALL
Old National Bancorp
ONB
$10.2B
| $176K | ﹤0.01% |
10,000
+9,923
| +12,887% | +$188K |
|
5883
ProShares Ultra Semiconductors
USD
$2.44B
| $176K | ﹤0.01% |
19,568
+5,024
| +35% | +$39.1K |
|
5884
PUT
Xerox
XRX
$387M
| $176K | ﹤0.01% |
+7,500
| New | +$181K |
|
|
CCEC
5885
CALL
Capital Clean Energy Carriers
CCEC
$1.34B
| $176K | ﹤0.01% |
+14,500
| New | +$178K |
|
|
ASAP
5886
PUT
DELISTED
Waitr Holdings Inc. Common Stock
ASAP
| $176K | ﹤0.01% |
4,945
+4,890
| +8,891% | +$222K |
|
5887
Antero Resources
AR
$11.1B
| $175K | ﹤0.01% |
11,688
-71,183
| -86% | -$836K |
|
5888
CALL
Barnes & Noble Education
BNED
$431M
| $175K | ﹤0.01% |
+243
| New | +$196K |
|
5889
PUT
Commercial Metals
CMC
$7.6B
| $175K | ﹤0.01% |
5,700
+5,569
| +4,251% | +$173K |
|
5890
CALL
Carter's
CRI
$1.42B
| $175K | ﹤0.01% |
1,700
+1,698
| +84,900% | +$173K |
|
|
GOOD
5891
CALL
Gladstone Commercial Corp
GOOD
$605M
| $175K | ﹤0.01% |
7,800
+7,489
| +2,408% | +$160K |
|
5892
PUT
Haverty Furniture Companies
HVT
$397M
| $175K | ﹤0.01% |
4,100
+4,052
| +8,442% | +$177K |
|
|
PDS
5893
PUT
Precision Drilling
PDS
$999M
| $175K | ﹤0.01% |
4,200
+4,160
| +10,400% | +$129K |
|
5894
Q2 Holdings
QTWO
$3.8B
| $175K | ﹤0.01% |
1,715
+677
| +65% | +$67.8K |
|
5895
PUT
Redwire
RDW
$2.06B
| $175K | ﹤0.01% |
+17,000
| New | +$172K |
|
|
ISBC
5896
CALL
DELISTED
Investors Bancorp, Inc.
ISBC
| $175K | ﹤0.01% |
12,300
+7,580
| +161% | +$112K |
|
|
AVEO
5897
DELISTED
AVEO Pharmaceuticals, Inc.
AVEO
| $175K | ﹤0.01% |
26,689
+11,035
| +70% | +$76.1K |
|
|
CHIX
5898
DELISTED
Global X MSCI China Financials ETF
CHIX
| $175K | ﹤0.01% |
11,381
+9,718
| +584% | +$156K |
|
5899
PUT
Acacia Research
ACTG
$428M
| $174K | ﹤0.01% |
25,800
+25,244
| +4,540% | +$150K |
|
5900
CALL
Allegiant Air
ALGT
$2.64B
| $174K | ﹤0.01% |
900
+898
| +44,900% | +$201K |
|
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.