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 | |
|---|---|---|---|---|---|---|
|
EVFM
4326
CALL
DELISTED
Evofem Biosciences, Inc. Common Stock
EVFM
| $450K | ﹤0.01% |
26,567
+26,513
| +49,098% | +$503K |
|
4327
PUT
Gaming and Leisure Properties
GLPI
$13B
| $449K | ﹤0.01% |
9,700
+9,635
| +14,823% | +$443K |
|
4328
PUT
Graphic Packaging
GPK
$3.33B
| $449K | ﹤0.01% |
24,800
+24,713
| +28,406% | +$452K |
|
4329
CALL
Itron
ITRI
$4.47B
| $449K | ﹤0.01% |
4,500
+4,481
| +23,584% | +$416K |
|
|
CMPS
4330
Compass Pathways
CMPS
$1.46B
| $448K | ﹤0.01% |
11,751
+9,197
| +360% | +$329K |
|
4331
PUT
Fulton Financial
FULT
$4.69B
| $448K | ﹤0.01% |
28,400
+28,282
| +23,968% | +$482K |
|
|
LX
4332
CALL
LexinFintech Holdings
LX
$246M
| $448K | ﹤0.01% |
36,600
+36,199
| +9,027% | +$367K |
|
4333
CALL
Matsons
MATX
$6.04B
| $448K | ﹤0.01% |
7,000
+6,981
| +36,742% | +$456K |
|
|
PLXP
4334
PUT
DELISTED
PLx Pharma Inc. Common Stock
PLXP
| $448K | ﹤0.01% |
+32,500
| New | +$385K |
|
|
LCI
4335
PUT
DELISTED
Lannett Company, Inc.
LCI
| $448K | ﹤0.01% |
+24,000
| New | +$460K |
|
4336
CALL
Autohome
ATHM
$2.6B
| $447K | ﹤0.01% |
7,000
+6,655
| +1,929% | +$547K |
|
|
CPRX
4337
DELISTED
Catalyst Pharmaceutical
CPRX
| $447K | ﹤0.01% |
77,800
+70,043
| +903% | +$361K |
|
|
PETQ
4338
PUT
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $447K | ﹤0.01% |
11,600
+11,430
| +6,724% | +$456K |
|
|
LDL
4339
CALL
DELISTED
Lydall, Inc.
LDL
| $447K | ﹤0.01% |
7,400
+7,386
| +52,757% | +$284K |
|
4340
Huntington Ingalls Industries
HII
$11.4B
| $446K | ﹤0.01% |
+2,118
| New | +$451K |
|
4341
CALL
NovaGold Resources
NG
$2.51B
| $446K | ﹤0.01% |
55,800
+55,239
| +9,847% | +$520K |
|
4342
APA Corp
APA
$12.8B
| $445K | ﹤0.01% |
20,589
-52,329
| -72% | -$1.07M |
|
4343
PUT
Joby Aviation
JOBY
$6.6B
| $445K | ﹤0.01% |
44,600
+42,775
| +2,344% | +$427K |
|
4344
PUT
Ribbon Communications
RBBN
$370M
| $445K | ﹤0.01% |
58,500
+56,744
| +3,231% | +$434K |
|
|
FREE
4345
CALL
DELISTED
Whole Earth Brands, Inc. Class A Common Stock
FREE
| $445K | ﹤0.01% |
30,700
+30,312
| +7,812% | +$405K |
|
|
AGCB
4346
PUT
DELISTED
Altimeter Growth Corp 2
AGCB
| $445K | ﹤0.01% |
43,500
+43,384
| +37,400% | +$456K |
|
|
CLDR
4347
DELISTED
Cloudera, Inc.
CLDR
| $445K | ﹤0.01% |
+28,116
| New | +$382K |
|
4348
iShares Latin America 40 ETF
ILF
$3.73B
| $444K | ﹤0.01% |
14,117
+13,382
| +1,821% | +$401K |
|
4349
PUT
Leidos
LDOS
$14.5B
| $444K | ﹤0.01% |
4,400
+4,321
| +5,470% | +$444K |
|
4350
CALL
Eastman Chemical
EMN
$7.67B
| $443K | ﹤0.01% |
3,800
+3,458
| +1,011% | +$415K |
|
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.