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 | |
|---|---|---|---|---|---|---|
5801
Brown & Brown
BRO
$23.6B
| $185K | ﹤0.01% |
3,485
+2,261
| +185% | +$116K |
|
5802
CALL
ClearPoint Neuro
CLPT
$448M
| $185K | ﹤0.01% |
+9,700
| New | +$187K |
|
5803
CALL
RCI Hospitality Holdings
RICK
$192M
| $185K | ﹤0.01% |
2,800
+2,716
| +3,233% | +$191K |
|
|
TSE
5804
PUT
DELISTED
Trinseo
TSE
| $185K | ﹤0.01% |
3,100
+3,044
| +5,436% | +$194K |
|
5805
Uranium Energy
UEC
$4.75B
| $185K | ﹤0.01% |
69,651
-49,257
| -41% | -$148K |
|
|
CPE
5806
DELISTED
Callon Petroleum Company
CPE
| $185K | ﹤0.01% |
3,218
-15,508
| -83% | -$652K |
|
5807
Full House Resorts
FLL
$80.1M
| $184K | ﹤0.01% |
18,590
+17,492
| +1,593% | +$169K |
|
5808
Hasbro
HAS
$13.2B
| $184K | ﹤0.01% |
1,948
-3,088
| -61% | -$297K |
|
5809
CALL
Lincoln Electric
LECO
$14.2B
| $184K | ﹤0.01% |
1,400
+1,335
| +2,054% | +$171K |
|
5810
MDU Resources
MDU
$4.17B
| $184K | ﹤0.01% |
15,461
+870
| +6% | +$10.9K |
|
|
5811
PUT
MDU Resources
MDU
$4.17B
| $184K | ﹤0.01% |
15,516
+15,453
| +24,529% | +$194K |
|
5812
CALL
National CineMedia
NCMI
$376M
| $184K | ﹤0.01% |
3,640
+3,498
| +2,463% | +$164K |
|
|
NM
5813
DELISTED
Navios Maritime Holdings Inc.
NM
| $184K | ﹤0.01% |
20,236
+10,026
| +98% | +$87K |
|
|
SWIR
5814
CALL
DELISTED
Sierra Wireless
SWIR
| $184K | ﹤0.01% |
9,700
+9,208
| +1,872% | +$143K |
|
|
INOV
5815
PUT
DELISTED
Inovalon Holdings, Inc. Class A Common Stock
INOV
| $184K | ﹤0.01% |
5,400
+5,351
| +10,920% | +$166K |
|
|
VCVC
5816
PUT
DELISTED
10X Capital Venture Acquisition Corp
VCVC
| $184K | ﹤0.01% |
39,500
+38,326
| +3,265% | +$382K |
|
5817
PUT
APi Group
APG
$17.1B
| $183K | ﹤0.01% |
13,200
+13,198
| +659,900% | +$187K |
|
5818
PUT
Coherus Oncology
CHRS
$217M
| $183K | ﹤0.01% |
+13,300
| New | +$188K |
|
5819
CVR Energy
CVI
$3.58B
| $183K | ﹤0.01% |
10,214
-5
| -0% | -$103 |
|
|
ORC
5820
PUT
Orchid Island Capital
ORC
$1.3B
| $183K | ﹤0.01% |
7,080
+7,077
| +235,900% | +$197K |
|
|
ENZ
5821
DELISTED
Enzo Biochem, Inc.
ENZ
| $183K | ﹤0.01% |
57,960
-100,682
| -63% | -$317K |
|
|
ROIC
5822
PUT
DELISTED
Retail Opportunity Investments Corp.
ROIC
| $183K | ﹤0.01% |
10,400
+9,448
| +992% | +$166K |
|
|
SPPI
5823
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $183K | ﹤0.01% |
48,969
+1,482
| +3% | +$5.15K |
|
|
EVOP
5824
CALL
DELISTED
EVO Payments, Inc. Class A Common Stock
EVOP
| $183K | ﹤0.01% |
+6,600
| New | +$188K |
|
|
CAJ
5825
CALL
DELISTED
Canon, Inc.
CAJ
| $183K | ﹤0.01% |
8,100
+7,800
| +2,600% | +$184K |
|
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.