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 | |
|---|---|---|---|---|---|---|
3826
PUT
Wrap Technologies
WRAP
$96.4M
| $617K | ﹤0.01% |
78,700
+78,466
| +33,532% | +$538K |
|
|
CCV
3827
CALL
DELISTED
Churchill Capital Corp V
CCV
| $617K | ﹤0.01% |
+61,300
| New | +$614K |
|
|
CARM
3828
DELISTED
Carisma Therapeutics
CARM
| $616K | ﹤0.01% |
6,669
-265
| -4% | -$16.9K |
|
3829
PUT
Invesco DB Base Metals Fund
DBB
$305M
| $616K | ﹤0.01% |
33,200
+33,136
| +51,775% | +$668K |
|
3830
PUT
LHA Market State Tactical Beta ETF
MSTB
$192M
| $615K | ﹤0.01% |
23,300
+23,037
| +8,759% | +$693K |
|
3831
CALL
Reinsurance Group of America
RGA
$15.9B
| $615K | ﹤0.01% |
5,400
+5,396
| +134,900% | +$680K |
|
3832
Twilio
TWLO
$29.5B
| $615K | ﹤0.01% |
1,561
-19,143
| -92% | -$6.65M |
|
|
ARI
3833
CALL
Apollo Commercial Real Estate
ARI
$881M
| $614K | ﹤0.01% |
38,500
+38,315
| +20,711% | +$592K |
|
|
AXON
3834
Axon Enterprise
AXON
$44.1B
| $614K | ﹤0.01% |
3,477
-558
| -14% | -$82.2K |
|
3835
Cheesecake Factory
CAKE
$4.42B
| $614K | ﹤0.01% |
+11,333
| New | +$655K |
|
3836
PBF Energy
PBF
$7.22B
| $614K | ﹤0.01% |
40,131
-30,113
| -43% | -$465K |
|
3837
CALL
Globant
GLOB
$1.52B
| $613K | ﹤0.01% |
2,800
+2,784
| +17,400% | +$612K |
|
3838
PUT
Victory Capital Holdings
VCTR
$6.28B
| $613K | ﹤0.01% |
19,000
+18,810
| +9,900% | +$550K |
|
3839
PUT
Century Communities
CCS
$2.05B
| $612K | ﹤0.01% |
9,200
+9,154
| +19,900% | +$646K |
|
3840
CALL
Prospect Capital
PSEC
$1.12B
| $612K | ﹤0.01% |
+73,000
| New | +$610K |
|
3841
Construction Partners
ROAD
$6.03B
| $612K | ﹤0.01% |
19,514
+10,589
| +119% | +$333K |
|
3842
SolarEdge
SEDG
$2.44B
| $612K | ﹤0.01% |
+2,217
| New | +$558K |
|
|
VISN
3843
CALL
Vistance Networks Inc
VISN
$2.67B
| $611K | ﹤0.01% |
28,700
+28,339
| +7,850% | +$528K |
|
|
DOO
3844
PUT
Bombardier Recreational Products
DOO
$4.58B
| $611K | ﹤0.01% |
+7,800
| New | +$659K |
|
|
EVRI
3845
PUT
DELISTED
Everi Holdings
EVRI
| $611K | ﹤0.01% |
24,500
+24,290
| +11,567% | +$459K |
|
|
CSPR
3846
PUT
DELISTED
Casper Sleep Inc.
CSPR
| $611K | ﹤0.01% |
74,200
+73,540
| +11,142% | +$642K |
|
|
YELL
3847
PUT
DELISTED
Yellow Corporation Common Stock
YELL
| $611K | ﹤0.01% |
+93,900
| New | +$699K |
|
|
CLDT
3848
CALL
Chatham Lodging
CLDT
$638M
| $610K | ﹤0.01% |
47,400
+47,168
| +20,331% | +$629K |
|
3849
PUT
Schwab US Broad Market ETF
SCHB
$42.9B
| $610K | ﹤0.01% |
44,400
+42,804
| +2,682% | +$724K |
|
3850
Sundial Growers
SNDL
$318M
| $609K | ﹤0.01% |
64,235
+31,491
| +96% | +$288K |
|
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.