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 | |
|---|---|---|---|---|---|---|
|
SOL
2851
CALL
DELISTED
Emeren Group
SOL
| $1.19M | ﹤0.01% |
131,200
+129,762
| +9,024% | +$1.16M |
|
2852
ProPetro Holding
PUMP
$1.45B
| $1.19M | ﹤0.01% |
130,107
+79,037
| +155% | +$819K |
|
|
RAD
2853
PUT
DELISTED
Rite Aid Corporation
RAD
| $1.19M | ﹤0.01% |
+73,100
| New | +$1.4M |
|
2854
PUT
BlackLine
BL
$1.69B
| $1.19M | ﹤0.01% |
10,700
+10,614
| +12,342% | +$1.16M |
|
|
RMO
2855
CALL
DELISTED
Romeo Power, Inc.
RMO
| $1.19M | ﹤0.01% |
146,300
+144,841
| +9,927% | +$1.24M |
|
2856
CALL
Rocket Lab Corp
RKLB
$39.9B
| $1.19M | ﹤0.01% |
+109,100
| New | +$1.13M |
|
|
BGFV
2857
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $1.19M | ﹤0.01% |
+46,200
| New | +$1.13M |
|
2858
PUT
Stratasys
SSYS
$697M
| $1.19M | ﹤0.01% |
+45,900
| New | +$1.04M |
|
2859
PUT
Arrowhead Research
ARWR
$12.1B
| $1.18M | ﹤0.01% |
+14,300
| New | +$1.06M |
|
2860
Ericsson
ERIC
$30.7B
| $1.18M | ﹤0.01% |
+94,083
| New | +$1.26M |
|
|
ACCD
2861
CALL
DELISTED
Accolade Inc
ACCD
| $1.18M | ﹤0.01% |
21,800
+21,684
| +18,693% | +$1.05M |
|
|
RVNC
2862
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $1.18M | ﹤0.01% |
39,900
+39,777
| +32,339% | +$1.15M |
|
|
HYZN
2863
DELISTED
Hyzon Motors Inc. Class A Common Stock
HYZN
| $1.18M | ﹤0.01% |
+2,292
| New | +$1.18M |
|
2864
CALL
Credit Acceptance
CACC
$6B
| $1.18M | ﹤0.01% |
2,600
+2,590
| +25,900% | +$1.06M |
|
|
COOP
2865
PUT
DELISTED
Mr. Cooper
COOP
| $1.18M | ﹤0.01% |
35,700
+35,524
| +20,184% | +$1.19M |
|
2866
CALL
Ambev
ABEV
$47.3B
| $1.18M | ﹤0.01% |
+342,500
| New | +$1.11M |
|
2867
Crocs
CROX
$6.69B
| $1.18M | ﹤0.01% |
10,114
-243
| -2% | -$23.9K |
|
2868
CALL
Ebang International Holdings
EBON
$12.7M
| $1.18M | ﹤0.01% |
+12,717
| New | +$1.43M |
|
2869
Seres Therapeutics
MCRB
$48.1M
| $1.18M | ﹤0.01% |
2,464
+832
| +51% | +$351K |
|
2870
Yum China
YUMC
$14.9B
| $1.17M | ﹤0.01% |
+17,722
| New | +$1.13M |
|
|
SP
2871
DELISTED
SP Plus Corporation
SP
| $1.17M | ﹤0.01% |
38,410
+19,361
| +102% | +$634K |
|
|
BWAC
2872
CALL
DELISTED
BETTER WORLD ACQUISITION CORP. Common Stock
BWAC
| $1.17M | ﹤0.01% |
117,400
+117,213
| +62,681% | +$1.17M |
|
2873
PUT
Equinox Gold
EQX
$7.32B
| $1.17M | ﹤0.01% |
168,900
+167,282
| +10,339% | +$1.43M |
|
2874
CALL
Revvity
RVTY
$12.3B
| $1.17M | ﹤0.01% |
7,600
+7,427
| +4,293% | +$1.04M |
|
2875
Verisk Analytics
VRSK
$26.4B
| $1.17M | ﹤0.01% |
6,711
+337
| +5% | +$59.8K |
|
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.