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 |
GE Aerospace
GE
|
+$36M |
| 2 |
Advanced Micro Devices
AMD
|
+$19.4M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$10.2M |
| 4 |
Micron Technology
MU
|
+$6.31M |
| 5 |
Alibaba
BABA
|
+$6.19M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$25.9M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.3M |
| 3 |
Amazon
AMZN
|
+$9.53M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.03M |
| 5 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$7.73M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.25% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CYBR
2001
CALL
DELISTED
CyberArk
CYBR
| $2.24M | ﹤0.01% |
17,000
| – | – |
|
2002
CALL
Charles River Laboratories
CRL
$10.9B
| $2.23M | ﹤0.01% |
6,000
-200
| -3% | -$83.1K |
|
2003
CALL
XPO
XPO
$25B
| $2.23M | ﹤0.01% |
26,591
-10,708
| -29% | -$537K |
|
2004
PUT
Incyte
INCY
$23.5B
| $2.23M | ﹤0.01% |
26,600
| – | – |
|
2005
CALL
Broadridge
BR
$17.2B
| $2.23M | ﹤0.01% |
13,700
+200
| +1% | +$34.1K |
|
2006
CALL
Omeros
OMER
$709M
| $2.23M | ﹤0.01% |
142,400
| – | – |
|
2007
CALL
Hancock Whitney
HWC
$6.13B
| $2.23M | ﹤0.01% |
49,600
| – | – |
|
2008
CALL
Raymond James Financial
RJF
$32.5B
| $2.23M | ﹤0.01% |
16,900
-8,450
| -33% | -$757K |
|
2009
PUT
Weibo
WB
$1.9B
| $2.23M | ﹤0.01% |
42,100
| – | – |
|
2010
CALL
Amdocs
DOX
$5.53B
| $2.23M | ﹤0.01% |
28,200
| – | – |
|
2011
CALL
Gevo
GEVO
$397M
| $2.23M | ﹤0.01% |
301,300
+2,200
| +0.7% | +$13.6K |
|
2012
CALL
Vera Bradley
VRA
$105M
| $2.22M | ﹤0.01% |
180,600
-200
| -0.1% | -$2.19K |
|
2013
PUT
Root
ROOT
$917M
| $2.22M | ﹤0.01% |
12,428
-5
| -0% | -$620 |
|
2014
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$863M
| $2.22M | ﹤0.01% |
38,317
-1,400
| -4% | -$74.1K |
|
2015
CALL
KeyCorp
KEY
$24.3B
| $2.22M | ﹤0.01% |
106,300
+100
| +0.1% | +$2.02K |
|
2016
CALL
SiriusXM
SIRI
$10B
| $2.22M | ﹤0.01% |
33,800
| – | – |
|
|
EXPR
2017
CALL
DELISTED
Express, Inc.
EXPR
| $2.22M | ﹤0.01% |
16,280
-470
| -3% | -$51.7K |
|
2018
CALL
Funko
FNKO
$323M
| $2.22M | ﹤0.01% |
104,700
| – | – |
|
2019
CALL
Public Service Enterprise Group
PEG
$39.8B
| $2.22M | ﹤0.01% |
36,800
-100
| -0.3% | -$6.25K |
|
2020
PUT
Infosys
INFY
$45B
| $2.21M | ﹤0.01% |
105,600
| – | – |
|
|
HAPN
2021
CALL
Happen Inc
HAPN
$2.08B
| $2.21M | ﹤0.01% |
126,200
+2,300
| +2% | +$57K |
|
2022
PUT
First Trust Natural Gas ETF
FCG
$632M
| $2.21M | ﹤0.01% |
21,500
| – | – |
|
2023
PUT
Ameriprise Financial
AMP
$46.8B
| $2.21M | ﹤0.01% |
8,800
+500
| +6% | +$131K |
|
2024
CALL
F5
FFIV
$22.1B
| $2.21M | ﹤0.01% |
11,700
+700
| +6% | +$140K |
|
2025
BioNTech
BNTX
$22.6B
| $2.2M | ﹤0.01% |
9,839
-1,051
| -10% | -$334K |
|
Similar funds
Simplex Trading's Q3 2021 Portfolio in Review
As of Q3 2021, Simplex Trading held 10,062 positions worth $107B, up 3.4% from $104B the previous quarter. Its ten largest holdings account for 41% of the portfolio.
Trading was light in Q3 2021: portfolio turnover was 3.5%. Simplex Trading opened 86 new positions and exited 271, leaving the 10,062-position portfolio largely intact.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.47% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q3 2021 buy was Olo Inc: 143,230 shares worth $4.91M.
- Simplex Trading added most to GE Aerospace in Q3 2021, an estimated $36M increase.
- Simplex Trading's biggest Q3 2021 reduction was NVIDIA, cutting an estimated $25.9M.
- Simplex Trading fully exited Amazon in Q3 2021, selling an estimated $9.53M.
- Simplex Trading's ten largest holdings make up 41% of its $107B portfolio in Q3 2021.
- Simplex Trading opened 86 new positions and closed 271 in Q3 2021.
- Simplex Trading's portfolio value rose 3.4% quarter-over-quarter to $107B.
Based on Simplex Trading's 13F filing for Q3 2021, filed 28 Oct 2021.