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 | |
|---|---|---|---|---|---|---|
1626
CALL
Astera Labs
ALAB
$50B
| $3.87M | ﹤0.01% |
64,000
-33,200
| -34% | -$2.3M |
|
1627
PUT
Harley-Davidson
HOG
$2.68B
| $3.84M | ﹤0.01% |
114,600
-31,600
| -22% | -$1.15M |
|
1628
PUT
Waste Management
WM
$95.9B
| $3.84M | ﹤0.01% |
18,000
-183,300
| -91% | -$38.1M |
|
1629
CALL
Roper Technologies
ROP
$36.3B
| $3.83M | ﹤0.01% |
6,800
-800
| -11% | -$431K |
|
1630
PUT
Appian
APPN
$1.74B
| $3.83M | ﹤0.01% |
124,000
+112,200
| +951% | +$3.68M |
|
1631
CALL
Avantor
AVTR
$7.81B
| $3.82M | ﹤0.01% |
180,400
+138,400
| +330% | +$3.33M |
|
1632
CALL
HSBC
HSBC
$355B
| $3.81M | ﹤0.01% |
87,700
+6,200
| +8% | +$267K |
|
|
SHNY
1633
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $3.81M | ﹤0.01% |
343,100
-110,900
| -24% | -$1.23M |
|
1634
Zillow
Z
$7.04B
| $3.81M | ﹤0.01% |
+82,074
| New | +$3.61M |
|
1635
PUT
Regions Financial
RF
$26.3B
| $3.81M | ﹤0.01% |
189,900
+5,900
| +3% | +$114K |
|
1636
PUT
Campbell Soup
CPB
$6.51B
| $3.8M | ﹤0.01% |
84,200
-18,500
| -18% | -$825K |
|
1637
PUT
Kinross Gold
KGC
$28.5B
| $3.79M | ﹤0.01% |
455,900
+160,100
| +54% | +$1.16M |
|
1638
CALL
Arthur J. Gallagher & Co
AJG
$63.7B
| $3.79M | ﹤0.01% |
14,600
-3,200
| -18% | -$794K |
|
1639
Tower Semiconductor
TSEM
$26.4B
| $3.78M | ﹤0.01% |
96,107
+33,437
| +53% | +$1.19M |
|
1640
CALL
Sun Life Financial
SLF
$45.6B
| $3.76M | ﹤0.01% |
76,700
-31,600
| -29% | -$1.6M |
|
1641
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $3.75M | ﹤0.01% |
34,100
-14,100
| -29% | -$981K |
|
1642
CALL
Telephone and Data Systems
TDS
$3.91B
| $3.74M | ﹤0.01% |
180,600
-25,800
| -13% | -$466K |
|
1643
CALL
Axsome Therapeutics
AXSM
$12.4B
| $3.73M | ﹤0.01% |
46,300
-16,100
| -26% | -$1.19M |
|
1644
CALL
Doximity
DOCS
$3.67B
| $3.73M | ﹤0.01% |
133,200
-72,400
| -35% | -$1.91M |
|
1645
PUT
Global E Online
GLBE
$6.08B
| $3.72M | ﹤0.01% |
102,600
+40,300
| +65% | +$1.3M |
|
1646
CALL
Rockwell Automation
ROK
$51.4B
| $3.72M | ﹤0.01% |
13,500
-15,100
| -53% | -$4.07M |
|
1647
PUT
Cummins
CMI
$91.7B
| $3.71M | ﹤0.01% |
13,400
-46,800
| -78% | -$13.4M |
|
|
EH
1648
PUT
EHang Holdings
EH
$372M
| $3.71M | ﹤0.01% |
273,200
-49,200
| -15% | -$832K |
|
1649
Johnson Controls International
JCI
$87.5B
| $3.71M | ﹤0.01% |
+55,797
| New | +$3.76M |
|
|
SGI
1650
Somnigroup International
SGI
$15.1B
| $3.71M | ﹤0.01% |
+78,340
| New | +$3.97M |
|
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.