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 | |
|---|---|---|---|---|---|---|
1726
ArcBest
ARCB
$3.44B
| $3.38M | ﹤0.01% |
31,590
-8,067
| -20% | -$972K |
|
1727
PUT
Roper Technologies
ROP
$36.3B
| $3.38M | ﹤0.01% |
6,000
-2,800
| -32% | -$1.51M |
|
1728
PUT
Murphy USA
MUSA
$11.3B
| $3.38M | ﹤0.01% |
7,200
+4,900
| +213% | +$2.14M |
|
1729
Golar LNG
GLNG
$4.95B
| $3.38M | ﹤0.01% |
107,801
+27,479
| +34% | +$726K |
|
1730
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
| $3.37M | ﹤0.01% |
+80,020
| New | +$3.41M |
|
1731
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $3.37M | ﹤0.01% |
29,500
-1,700
| -5% | -$107K |
|
1732
Norwegian Cruise Line
NCLH
$8.89B
| $3.37M | ﹤0.01% |
+179,188
| New | +$3.15M |
|
|
AZEK
1733
CALL
DELISTED
The AZEK Co
AZEK
| $3.36M | ﹤0.01% |
79,700
+36,400
| +84% | +$1.68M |
|
|
TIGR
1734
PUT
UP Fintech Holding
TIGR
$845M
| $3.35M | ﹤0.01% |
798,900
+276,000
| +53% | +$1.09M |
|
1735
TJX Companies
TJX
$170B
| $3.35M | ﹤0.01% |
+30,446
| New | +$3.07M |
|
|
DO
1736
PUT
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $3.35M | ﹤0.01% |
216,200
+203,300
| +1,576% | +$2.9M |
|
1737
PUT
ATI
ATI
$27B
| $3.34M | ﹤0.01% |
60,200
+42,100
| +233% | +$2.36M |
|
1738
CALL
Public Storage
PSA
$60.2B
| $3.34M | ﹤0.01% |
11,600
-4,700
| -29% | -$1.3M |
|
1739
CALL
StoneCo
STNE
$2.62B
| $3.33M | ﹤0.01% |
277,900
-148,100
| -35% | -$2.18M |
|
1740
PUT
Ball Corp
BALL
$17B
| $3.33M | ﹤0.01% |
55,500
-93,400
| -63% | -$6.26M |
|
1741
PUT
BCE
BCE
$19.9B
| $3.33M | ﹤0.01% |
102,800
+80,900
| +369% | +$2.7M |
|
1742
PUT
Dave & Buster's
PLAY
$343M
| $3.32M | ﹤0.01% |
83,500
-47,100
| -36% | -$2.45M |
|
1743
XPO
XPO
$25B
| $3.32M | ﹤0.01% |
31,323
+9,327
| +42% | +$1.05M |
|
1744
CALL
Jack in the Box
JACK
$278M
| $3.32M | ﹤0.01% |
65,200
-9,300
| -12% | -$522K |
|
1745
CALL
TC Energy
TRP
$73.5B
| $3.32M | ﹤0.01% |
87,600
-18,500
| -17% | -$702K |
|
1746
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $3.32M | ﹤0.01% |
140,500
-100,800
| -42% | -$2.46M |
|
1747
CALL
AdaptHealth
AHCO
$1.46B
| $3.31M | ﹤0.01% |
330,800
+68,500
| +26% | +$696K |
|
1748
PUT
Markel Group
MKL
$25B
| $3.31M | ﹤0.01% |
2,100
+500
| +31% | +$776K |
|
1749
Zoom
ZM
$25.8B
| $3.3M | ﹤0.01% |
+55,793
| New | +$3.43M |
|
1750
PUT
Quest Diagnostics
DGX
$25.1B
| $3.3M | ﹤0.01% |
24,100
-37,100
| -61% | -$5.08M |
|
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.