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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2001
CALL
Triumph Financial Inc
TFIN
$1.84B
| $2.18M | ﹤0.01% |
33,700
+29,400
| +684% | +$1.94M |
|
2002
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $2.18M | ﹤0.01% |
21,700
-17,600
| -45% | -$2.01M |
|
2003
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $2.18M | ﹤0.01% |
19,400
-2,300
| -11% | -$242K |
|
2004
CALL
Clear Secure
YOU
$5.26B
| $2.18M | ﹤0.01% |
114,600
+69,700
| +155% | +$1.54M |
|
|
RDFN
2005
PUT
DELISTED
Redfin
RDFN
| $2.18M | ﹤0.01% |
309,600
+168,900
| +120% | +$1.86M |
|
2006
PUT
Domo
DOMO
$166M
| $2.18M | ﹤0.01% |
221,900
+219,200
| +8,119% | +$3.05M |
|
2007
PUT
Willis Towers Watson
WTW
$27.9B
| $2.17M | ﹤0.01% |
10,400
+4,400
| +73% | +$939K |
|
2008
CALL
Casey's General Stores
CASY
$31.9B
| $2.17M | ﹤0.01% |
8,000
+7,100
| +789% | +$1.8M |
|
|
SOND
2009
CALL
DELISTED
Sonder
SOND
| $2.16M | ﹤0.01% |
263,500
+248,810
| +1,694% | +$2.42M |
|
2010
TransDigm Group
TDG
$69.2B
| $2.16M | ﹤0.01% |
+2,561
| New | +$2.25M |
|
|
CBL
2011
CALL
DELISTED
CBL& Associates Properties, Inc.
CBL
| $2.16M | ﹤0.01% |
102,800
-400
| -0.4% | -$8.39K |
|
2012
PUT
Amylyx Pharmaceuticals
AMLX
$2.05B
| $2.15M | ﹤0.01% |
117,500
+35,700
| +44% | +$755K |
|
2013
CALL
Trane Technologies
TT
$106B
| $2.15M | ﹤0.01% |
10,600
+9,500
| +864% | +$1.9M |
|
2014
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $2.15M | ﹤0.01% |
26,900
+10,700
| +66% | +$651K |
|
2015
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $2.15M | ﹤0.01% |
26,400
+23,500
| +810% | +$1.47M |
|
|
CGC
2016
CALL
Canopy Growth
CGC
$375M
| $2.14M | ﹤0.01% |
273,380
+212,890
| +352% | +$1.3M |
|
2017
MetLife
MET
$61B
| $2.14M | ﹤0.01% |
34,025
-33,433
| -50% | -$2.08M |
|
2018
CALL
Bath & Body Works
BBWI
$4.01B
| $2.14M | ﹤0.01% |
63,300
+25,100
| +66% | +$912K |
|
2019
Academy Sports + Outdoors
ASO
$2.89B
| $2.13M | ﹤0.01% |
45,071
+19,429
| +76% | +$1.04M |
|
2020
PUT
Ternium
TX
$9.29B
| $2.13M | ﹤0.01% |
53,400
+41,700
| +356% | +$1.72M |
|
2021
PUT
Bausch Health
BHC
$1.65B
| $2.12M | ﹤0.01% |
257,700
-66,800
| -21% | -$576K |
|
2022
CALL
Signet Jewelers
SIG
$3.55B
| $2.12M | ﹤0.01% |
29,500
+19,900
| +207% | +$1.48M |
|
2023
Sprott Junior Uranium Miners ETF
URNJ
$306M
| $2.12M | ﹤0.01% |
+89,496
| New | +$1.69M |
|
2024
PUT
Monster Beverage
MNST
$91.4B
| $2.11M | ﹤0.01% |
39,900
+3,700
| +10% | +$210K |
|
2025
American Airlines Group
AAL
$9.58B
| $2.11M | ﹤0.01% |
+164,526
| New | +$2.55M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.