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 | |
|---|---|---|---|---|---|---|
3526
CALL
Shutterstock
SSTK
$216M
| $765K | ﹤0.01% |
7,800
+7,756
| +17,627% | +$711K |
|
3527
CALL
Global Net Lease
GNL
$1.87B
| $764K | ﹤0.01% |
41,300
+41,018
| +14,545% | +$782K |
|
3528
CALL
Chefs' Warehouse
CHEF
$3.9B
| $763K | ﹤0.01% |
24,000
+23,465
| +4,386% | +$750K |
|
3529
CALL
Televisa
TV
$1.48B
| $763K | ﹤0.01% |
53,500
+53,475
| +213,900% | +$687K |
|
3530
PUT
Lufax Holding
LU
$1.27B
| $762K | ﹤0.01% |
16,875
+16,805
| +24,007% | +$847K |
|
3531
CALL
Hewlett Packard
HPE
$63.8B
| $761K | ﹤0.01% |
52,200
+51,164
| +4,939% | +$808K |
|
3532
Credicorp
BAP
$31.1B
| $759K | ﹤0.01% |
6,269
+4,316
| +221% | +$564K |
|
3533
CALL
FS KKR Capital
FSK
$3.04B
| $758K | ﹤0.01% |
35,266
+35,135
| +26,821% | +$753K |
|
3534
PUT
Galicia Financial Group
GGAL
$8.03B
| $758K | ﹤0.01% |
88,000
+87,270
| +11,955% | +$734K |
|
|
SNBR
3535
CALL
DELISTED
Sleep Number
SNBR
| $758K | ﹤0.01% |
+6,900
| New | +$786K |
|
3536
YPF
YPF
$20B
| $758K | ﹤0.01% |
162,161
+109,942
| +211% | +$494K |
|
|
NUVA
3537
DELISTED
NuVasive, Inc.
NUVA
| $757K | ﹤0.01% |
+11,182
| New | +$763K |
|
|
ZY
3538
PUT
DELISTED
Zymergen Inc. Common Stock
ZY
| $756K | ﹤0.01% |
+18,900
| New | +$746K |
|
|
SRG
3539
Seritage Growth Properties
SRG
$133M
| $755K | ﹤0.01% |
41,067
-1,125
| -3% | -$20K |
|
3540
Ternium
TX
$9.37B
| $755K | ﹤0.01% |
19,649
+7,678
| +64% | +$293K |
|
3541
PUT
Autohome
ATHM
$2.46B
| $754K | ﹤0.01% |
11,800
+11,679
| +9,652% | +$960K |
|
3542
CALL
Pathward Financial
CASH
$1.82B
| $754K | ﹤0.01% |
14,900
+14,884
| +93,025% | +$739K |
|
3543
Century Communities
CCS
$2.03B
| $754K | ﹤0.01% |
11,342
+10,539
| +1,312% | +$744K |
|
|
RDS.B
3544
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $754K | ﹤0.01% |
19,431
-27,259
| -58% | -$1.03M |
|
3545
CALL
Otis Worldwide
OTIS
$27.9B
| $752K | ﹤0.01% |
9,200
+8,878
| +2,757% | +$683K |
|
3546
PUT
WillScot Mobile Mini Holdings
WSC
$4.85B
| $752K | ﹤0.01% |
27,000
+26,917
| +32,430% | +$774K |
|
|
AJRD
3547
PUT
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $752K | ﹤0.01% |
+15,600
| New | +$749K |
|
3548
CALL
H.B. Fuller
FUL
$3.04B
| $750K | ﹤0.01% |
11,800
+11,771
| +40,590% | +$789K |
|
3549
Vanguard Consumer Discretionary ETF
VCR
$5.92B
| $750K | ﹤0.01% |
+2,390
| New | +$733K |
|
|
ME
3550
PUT
DELISTED
23andMe Holding Co
ME
| $749K | ﹤0.01% |
3,205
+3,053
| +2,009% | +$635K |
|
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.