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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2001
CALL
RingCentral
RNG
$4.05B
| $2.5M | ﹤0.01% |
88,500
+13,800
| +18% | +$444K |
|
2002
Netflix
NFLX
$292B
| $2.49M | ﹤0.01% |
+36,930
| New | +$2.31M |
|
2003
PUT
Murphy Oil
MUR
$5.58B
| $2.49M | ﹤0.01% |
60,400
-3,400
| -5% | -$148K |
|
2004
PUT
Regency Centers
REG
$15B
| $2.49M | ﹤0.01% |
+40,000
| New | +$2.4M |
|
2005
PUT
Moody's
MCO
$81.7B
| $2.48M | ﹤0.01% |
5,900
-2,700
| -31% | -$1.07M |
|
2006
CALL
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $2.48M | ﹤0.01% |
103,000
+42,700
| +71% | +$811K |
|
2007
Medtronic
MDT
$107B
| $2.47M | ﹤0.01% |
+31,435
| New | +$2.58M |
|
2008
CALL
Mattel
MAT
$4.17B
| $2.47M | ﹤0.01% |
151,700
-150,900
| -50% | -$2.73M |
|
2009
DexCom
DXCM
$27.6B
| $2.46M | ﹤0.01% |
21,749
+6,422
| +42% | +$812K |
|
2010
CALL
Peloton Interactive
PTON
$2.63B
| $2.46M | ﹤0.01% |
729,100
-80,400
| -10% | -$288K |
|
2011
NextEra Energy
NEE
$187B
| $2.46M | ﹤0.01% |
+34,794
| New | +$2.47M |
|
2012
Global X Uranium ETF
URA
$5.52B
| $2.46M | ﹤0.01% |
85,098
+1,867
| +2% | +$56.9K |
|
2013
PUT
Hormel Foods
HRL
$13.9B
| $2.46M | ﹤0.01% |
80,700
+5,400
| +7% | +$182K |
|
2014
CALL
Omnicom Group
OMC
$22.7B
| $2.46M | ﹤0.01% |
27,400
-3,800
| -12% | -$353K |
|
2015
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$332M
| $2.45M | ﹤0.01% |
31,247
+7,320
| +31% | +$650K |
|
2016
PUT
Kinder Morgan
KMI
$73.1B
| $2.45M | ﹤0.01% |
123,400
-73,700
| -37% | -$1.41M |
|
2017
CALL
QuantumScape Corp
QS
$3B
| $2.44M | ﹤0.01% |
496,400
+168,500
| +51% | +$939K |
|
|
ALTR
2018
PUT
DELISTED
Altair Engineering Inc
ALTR
| $2.44M | ﹤0.01% |
24,900
-3,800
| -13% | -$334K |
|
|
VSXY
2019
CALL
Victoria's Secret
VSXY
$6.64B
| $2.44M | ﹤0.01% |
138,200
-23,700
| -15% | -$451K |
|
2020
CALL
Martin Marietta Materials
MLM
$33.6B
| $2.44M | ﹤0.01% |
4,500
-9,300
| -67% | -$5.4M |
|
2021
CALL
Ardelyx
ARDX
$1.24B
| $2.44M | ﹤0.01% |
329,000
-21,900
| -6% | -$154K |
|
2022
PUT
TAL Education Group
TAL
$5.71B
| $2.44M | ﹤0.01% |
228,400
-29,900
| -12% | -$353K |
|
2023
CALL
dLocal
DLO
$4.26B
| $2.44M | ﹤0.01% |
301,200
-31,000
| -9% | -$364K |
|
2024
CALL
Winnebago Industries
WGO
$870M
| $2.43M | ﹤0.01% |
44,900
-30,800
| -41% | -$1.9M |
|
2025
CALL
Bumble
BMBL
$367M
| $2.43M | ﹤0.01% |
231,300
+88,700
| +62% | +$966K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.