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 | |
|---|---|---|---|---|---|---|
6076
PUT
Caesarstone
CSTE
$72.3M
| $156K | ﹤0.01% |
10,600
+10,364
| +4,392% | +$157K |
|
6077
CALL
Idacorp
IDA
$8.27B
| $156K | ﹤0.01% |
1,600
+1,598
| +79,900% | +$160K |
|
6078
CALL
RLI Corp
RLI
$5.62B
| $156K | ﹤0.01% |
3,000
+2,970
| +9,900% | +$161K |
|
6079
PUT
TFS Financial
TFSL
$5.16B
| $156K | ﹤0.01% |
7,700
+7,610
| +8,456% | +$158K |
|
|
PVLA
6080
Palvella Therapeutics
PVLA
$1.99B
| $156K | ﹤0.01% |
+511
| New | +$112K |
|
6081
Eversource Energy
ES
$26.9B
| $155K | ﹤0.01% |
1,937
-833
| -30% | -$70.1K |
|
6082
CALL
Entravision Communication
EVC
$1.03B
| $155K | ﹤0.01% |
23,300
+23,049
| +9,183% | +$104K |
|
6083
PUT
Global Net Lease
GNL
$1.84B
| $155K | ﹤0.01% |
8,400
+8,297
| +8,055% | +$158K |
|
6084
PUT
PTC
PTC
$15.8B
| $155K | ﹤0.01% |
1,100
+1,092
| +13,650% | +$149K |
|
6085
Westwood Holdings Group
WHG
$182M
| $155K | ﹤0.01% |
7,135
-8,593
| -55% | -$163K |
|
|
QTT
6086
CALL
DELISTED
Qutoutiao Inc. American Depositary Shares
QTT
| $155K | ﹤0.01% |
8,360
+8,329
| +26,868% | +$176K |
|
|
LMNX
6087
DELISTED
Luminex Corp
LMNX
| $155K | ﹤0.01% |
+4,227
| New | +$154K |
|
|
UBA
6088
CALL
DELISTED
Urstadt Biddle Properties Inc. Class A
UBA
| $155K | ﹤0.01% |
8,000
+7,876
| +6,352% | +$145K |
|
|
AMED
6089
DELISTED
Amedisys
AMED
| $154K | ﹤0.01% |
629
+551
| +706% | +$145K |
|
6090
PUT
Group 1 Automotive
GPI
$3.42B
| $154K | ﹤0.01% |
1,000
+995
| +19,900% | +$160K |
|
|
OTRK
6091
DELISTED
Ontrak
OTRK
| $154K | ﹤0.01% |
53
-114
| -68% | -$329K |
|
6092
CALL
Singularity Future Technology
SGLY
$4.69M
| $154K | ﹤0.01% |
341
+334
| +4,771% | +$194K |
|
6093
CALL
Alaunos Therapeutics
TCRT
$4.59M
| $154K | ﹤0.01% |
389
+387
| +19,350% | +$181K |
|
|
SCPL
6094
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $154K | ﹤0.01% |
9,108
-2,958
| -25% | -$51K |
|
|
POTX
6095
DELISTED
Global X Cannabis ETF
POTX
| $154K | ﹤0.01% |
1,865
-6,222
| -77% | -$534K |
|
6096
PUT
Future Fuel
FF
$217M
| $153K | ﹤0.01% |
16,100
+16,045
| +29,173% | +$194K |
|
6097
PUT
Granite Construction
GVA
$5.29B
| $153K | ﹤0.01% |
3,700
+3,587
| +3,174% | +$142K |
|
6098
Outdoor Holding Co
POWW
$249M
| $153K | ﹤0.01% |
15,661
-169,834
| -92% | -$1.21M |
|
6099
CALL
Supernus Pharmaceuticals
SUPN
$2.59B
| $153K | ﹤0.01% |
+5,000
| New | +$153K |
|
|
TWNK
6100
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $153K | ﹤0.01% |
9,507
-357
| -4% | -$5.56K |
|
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.