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 | |
|---|---|---|---|---|---|---|
|
INFO
4626
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $371K | ﹤0.01% |
+3,298
| New | +$350K |
|
|
FINV
4627
FinVolution Group
FINV
$1.17B
| $370K | ﹤0.01% |
38,883
-116,456
| -75% | -$883K |
|
4628
PUT
RadNet
RDNT
$4.98B
| $370K | ﹤0.01% |
11,000
+10,967
| +33,233% | +$289K |
|
|
WPRT
4629
CALL
Westport Fuel Systems
WPRT
$31.9M
| $370K | ﹤0.01% |
6,980
+6,895
| +8,112% | +$416K |
|
|
CNR
4630
CALL
DELISTED
Cornerstone Building Brands, Inc.
CNR
| $370K | ﹤0.01% |
+20,400
| New | +$328K |
|
|
QTT
4631
DELISTED
Qutoutiao Inc. American Depositary Shares
QTT
| $369K | ﹤0.01% |
19,885
-10,775
| -35% | -$227K |
|
4632
PUT
Aclaris Therapeutics
ACRS
$715M
| $368K | ﹤0.01% |
21,000
+20,859
| +14,794% | +$474K |
|
4633
PUT
California Resources
CRC
$4.49B
| $367K | ﹤0.01% |
12,200
+12,197
| +406,567% | +$335K |
|
4634
PUT
RB Global
RBA
$21.5B
| $367K | ﹤0.01% |
6,200
+6,193
| +88,471% | +$381K |
|
4635
PUT
SelectQuote
SLQT
$122M
| $367K | ﹤0.01% |
19,100
+19,037
| +30,217% | +$475K |
|
|
DTEA
4636
CALL
DELISTED
DAVIDsTEA Inc. Common Stock
DTEA
| $367K | ﹤0.01% |
84,500
+84,075
| +19,782% | +$325K |
|
4637
Autoliv
ALV
$9.14B
| $366K | ﹤0.01% |
3,751
+3,354
| +845% | +$338K |
|
4638
Middleby
MIDD
$6.01B
| $366K | ﹤0.01% |
2,117
+515
| +32% | +$87.8K |
|
4639
PUT
Sally Beauty Holdings
SBH
$1.47B
| $366K | ﹤0.01% |
16,600
+16,407
| +8,501% | +$346K |
|
|
OBSV
4640
PUT
DELISTED
ObsEva SA Ordinary Shares
OBSV
| $366K | ﹤0.01% |
120,800
+120,039
| +15,774% | +$353K |
|
|
CHNG
4641
CALL
DELISTED
Change Healthcare Inc. Common Stock
CHNG
| $366K | ﹤0.01% |
15,900
+15,572
| +4,748% | +$358K |
|
4642
PUT
Black Stone Minerals
BSM
$3.14B
| $365K | ﹤0.01% |
34,000
+33,757
| +13,892% | +$340K |
|
4643
PUT
FTAI Aviation
FTAI
$20.2B
| $365K | ﹤0.01% |
+12,764
| New | +$321K |
|
|
GOGL
4644
PUT
DELISTED
Golden Ocean Group
GOGL
| $365K | ﹤0.01% |
33,100
+32,976
| +26,594% | +$306K |
|
|
AVYA
4645
CALL
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $365K | ﹤0.01% |
13,600
+13,546
| +25,085% | +$381K |
|
4646
CALL
Axsome Therapeutics
AXSM
$11.7B
| $364K | ﹤0.01% |
5,400
+5,313
| +6,107% | +$319K |
|
|
BLUE
4647
CALL
DELISTED
bluebird bio
BLUE
| $364K | ﹤0.01% |
880
+846
| +2,488% | +$335K |
|
|
HUT
4648
Hut 8
HUT
$9.93B
| $364K | ﹤0.01% |
+16,566
| New | +$319K |
|
4649
CALL
ImmunityBio
IBRX
$7.15B
| $364K | ﹤0.01% |
25,500
+25,189
| +8,099% | +$416K |
|
|
KELYB
4650
CALL
Kelly Services Class B
KELYB
$797M
| $364K | ﹤0.01% |
15,200
+14,998
| +7,425% | +$394K |
|
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.