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 | |
|---|---|---|---|---|---|---|
|
QVCGA
8176
DELISTED
QVC Group Inc Series A
QVCGA
| $32K | ﹤0.01% |
50
-2,344
| -98% | -$1.5M |
|
|
FRGI
8177
CALL
DELISTED
Fiesta Restaurant Group, Inc.
FRGI
| $32K | ﹤0.01% |
2,400
+2,392
| +29,900% | +$32.6K |
|
|
APTO
8178
CALL
DELISTED
Aptose Biosciences, Inc.
APTO
| $32K | ﹤0.01% |
22
+21
| +2,100% | +$45.7K |
|
|
TA
8179
PUT
DELISTED
TravelCenters of America LLC
TA
| $32K | ﹤0.01% |
+1,100
| New | +$30.6K |
|
|
LJPC
8180
CALL
DELISTED
La Jolla Pharmaceutical Company
LJPC
| $32K | ﹤0.01% |
7,500
+7,488
| +62,400% | +$32.1K |
|
8181
PUT
Aecom
ACM
$9.12B
| $31K | ﹤0.01% |
500
+260
| +108% | +$17K |
|
8182
PUT
Assurant
AIZ
$13.7B
| $31K | ﹤0.01% |
200
+184
| +1,150% | +$28.7K |
|
8183
CALL
Anixa Biosciences
ANIX
$118M
| $31K | ﹤0.01% |
+8,200
| New | +$34.9K |
|
8184
CALL
American Public Education
APEI
$907M
| $31K | ﹤0.01% |
1,100
+1,084
| +6,775% | +$32.7K |
|
8185
PUT
AXT Inc
AXTI
$3.13B
| $31K | ﹤0.01% |
2,900
+2,889
| +26,264% | +$30.7K |
|
8186
Ciena
CIEN
$53.4B
| $31K | ﹤0.01% |
548
-6,133
| -92% | -$338K |
|
8187
Cardiff Oncology
CRDF
$65M
| $31K | ﹤0.01% |
+4,806
| New | +$40.8K |
|
8188
CALL
Customers Bancorp
CUBI
$2.66B
| $31K | ﹤0.01% |
+800
| New | +$28.8K |
|
8189
CALL
Denali Therapeutics
DNLI
$3.74B
| $31K | ﹤0.01% |
400
+356
| +809% | +$22K |
|
8190
PUT
Hayward Holdings
HAYW
$3.16B
| $31K | ﹤0.01% |
1,200
+1,195
| +23,900% | +$26.1K |
|
8191
CALL
Helix Energy Solutions
HLX
$1.42B
| $31K | ﹤0.01% |
5,600
+4,536
| +426% | +$23.8K |
|
8192
CALL
Hexcel
HXL
$8.28B
| $31K | ﹤0.01% |
+500
| New | +$28.8K |
|
|
PPLI
8193
PUT
People Inc
PPLI
$3.15B
| $31K | ﹤0.01% |
610
+407
| +200% | +$52.7K |
|
8194
Jazz Pharmaceuticals
JAZZ
$16B
| $31K | ﹤0.01% |
+177
| New | +$30.7K |
|
8195
Grand Canyon Education
LOPE
$3.84B
| $31K | ﹤0.01% |
+355
| New | +$35.1K |
|
|
PDM
8196
CALL
Piedmont Realty Trust
PDM
$1.22B
| $31K | ﹤0.01% |
1,700
+1,665
| +4,757% | +$31K |
|
8197
Invesco Financial Preferred ETF
PGF
$675M
| $31K | ﹤0.01% |
1,631
-676
| -29% | -$12.9K |
|
|
REVG
8198
CALL
DELISTED
REV Group
REVG
| $31K | ﹤0.01% |
2,000
+1,955
| +4,344% | +$35.4K |
|
8199
PUT
Regenxbio
RGNX
$622M
| $31K | ﹤0.01% |
800
+795
| +15,900% | +$28.4K |
|
8200
Sypris Solutions
SYPR
$47.4M
| $31K | ﹤0.01% |
+8,438
| New | +$28.1K |
|
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.