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 | |
|---|---|---|---|---|---|---|
|
AHRT
4351
CALL
AH Realty Trust
AHRT
$542M
| $442K | ﹤0.01% |
33,300
+33,184
| +28,607% | +$445K |
|
4352
PUT
Atmos Energy
ATO
$30B
| $442K | ﹤0.01% |
4,600
+4,478
| +3,670% | +$449K |
|
|
SOGP
4353
CALL
Sound Group
SOGP
$51.2M
| $442K | ﹤0.01% |
6,040
+6,035
| +120,700% | +$387K |
|
|
SOL
4354
PUT
DELISTED
Emeren Group
SOL
| $442K | ﹤0.01% |
48,600
+47,771
| +5,762% | +$427K |
|
4355
PUT
Xeris Biopharma Holdings
XERS
$1.45B
| $442K | ﹤0.01% |
108,800
+108,775
| +435,100% | +$415K |
|
|
LORL
4356
PUT
DELISTED
Loral Space and Communications, Inc.
LORL
| $442K | ﹤0.01% |
11,400
+11,314
| +13,156% | +$430K |
|
|
MXIM
4357
CALL
DELISTED
Maxim Integrated Products
MXIM
| $442K | ﹤0.01% |
+4,200
| New | +$411K |
|
4358
CALL
Cal-Maine
CALM
$4.47B
| $441K | ﹤0.01% |
+12,200
| New | +$457K |
|
4359
CALL
Kennametal
KMT
$2.58B
| $441K | ﹤0.01% |
12,300
+12,272
| +43,829% | +$480K |
|
4360
NovaGold Resources
NG
$2.51B
| $441K | ﹤0.01% |
55,087
+29,543
| +116% | +$278K |
|
|
CNH
4361
CNH Industrial
CNH
$13.4B
| $441K | ﹤0.01% |
30,324
-2,428
| -7% | -$34.7K |
|
|
AIRC
4362
PUT
DELISTED
Apartment Income REIT Corp.
AIRC
| $441K | ﹤0.01% |
9,300
+9,211
| +10,349% | +$424K |
|
|
PTR
4363
CALL
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $441K | ﹤0.01% |
9,000
+8,887
| +7,865% | +$361K |
|
4364
PUT
Kulicke & Soffa
KLIC
$4.29B
| $440K | ﹤0.01% |
7,200
+7,135
| +10,977% | +$384K |
|
4365
PUT
Corbus Pharmaceuticals
CRBP
$166M
| $439K | ﹤0.01% |
8,007
+7,994
| +61,492% | +$444K |
|
4366
PUT
GrafTech
EAF
$188M
| $439K | ﹤0.01% |
3,780
+3,760
| +18,800% | +$472K |
|
|
PIPP
4367
DELISTED
Pine Island Acquisition Corp.
PIPP
| $439K | ﹤0.01% |
45,174
+3,426
| +8% | +$33.9K |
|
|
LFTR
4368
PUT
DELISTED
Lefteris Acquisition Corp. Class A Common Stock
LFTR
| $439K | ﹤0.01% |
45,100
+44,297
| +5,516% | +$435K |
|
4369
CALL
Babcock & Wilcox
BW
$1.19B
| $438K | ﹤0.01% |
55,600
+54,988
| +8,985% | +$454K |
|
4370
PUT
Purple Innovation
PRPL
$35.2M
| $438K | ﹤0.01% |
664
+653
| +5,936% | +$501K |
|
|
ELMS
4371
DELISTED
Electric Last Mile Solutions, Inc. Class A Common stock
ELMS
| $438K | ﹤0.01% |
43,545
-148,644
| -77% | -$1.49M |
|
|
ARCH
4372
PUT
DELISTED
Arch Resources, Inc.
ARCH
| $438K | ﹤0.01% |
7,700
+7,652
| +15,942% | +$400K |
|
4373
PUT
Barnes & Noble Education
BNED
$441M
| $437K | ﹤0.01% |
+607
| New | +$490K |
|
4374
CALL
Globus Maritime Ltd
GLBS
$63M
| $437K | ﹤0.01% |
+112,700
| New | +$512K |
|
4375
CALL
Sunoco
SUN
$14.7B
| $437K | ﹤0.01% |
11,600
+11,515
| +13,547% | +$409K |
|
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.