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 | |
|---|---|---|---|---|---|---|
1926
PUT
Teekay Tankers
TNK
$2.63B
| $2.75M | ﹤0.01% |
39,900
-25,800
| -39% | -$1.68M |
|
1927
CALL
Magnite
MGNI
$2.65B
| $2.74M | ﹤0.01% |
206,400
+71,200
| +53% | +$778K |
|
1928
CALL
Pitney Bowes
PBI
$2.42B
| $2.73M | ﹤0.01% |
538,300
+108,500
| +25% | +$518K |
|
|
SAVE
1929
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $2.73M | ﹤0.01% |
745,500
-1,194,200
| -62% | -$4.62M |
|
1930
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $2.72M | ﹤0.01% |
15,400
-3,400
| -18% | -$641K |
|
1931
CALL
Ares Management
ARES
$28.5B
| $2.72M | ﹤0.01% |
20,400
+12,500
| +158% | +$1.71M |
|
1932
PUT
PACCAR
PCAR
$69.6B
| $2.72M | ﹤0.01% |
26,400
-20,900
| -44% | -$2.3M |
|
1933
PUT
iQIYI
IQ
$1.18B
| $2.71M | ﹤0.01% |
739,400
+225,100
| +44% | +$1.02M |
|
1934
CALL
Trex
TREX
$4.51B
| $2.71M | ﹤0.01% |
36,600
+20,100
| +122% | +$1.76M |
|
1935
PUT
Labcorp
LH
$24.3B
| $2.71M | ﹤0.01% |
13,300
-16,600
| -56% | -$3.38M |
|
1936
PUT
SoundHound AI
SOUN
$2.68B
| $2.71M | ﹤0.01% |
685,100
-4,700
| -0.7% | -$21.8K |
|
1937
PUT
Navios Maritime Partners
NMM
$2.25B
| $2.7M | ﹤0.01% |
53,000
+31,600
| +148% | +$1.47M |
|
1938
CALL
Yum China
YUMC
$14.9B
| $2.7M | ﹤0.01% |
87,700
-9,200
| -9% | -$337K |
|
1939
CALL
West Pharmaceutical
WST
$23.1B
| $2.7M | ﹤0.01% |
8,200
| – | – |
|
1940
Rivian
RIVN
$22.9B
| $2.69M | ﹤0.01% |
+200,846
| New | +$2.1M |
|
1941
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $2.69M | ﹤0.01% |
41,400
-24,900
| -38% | -$1.7M |
|
|
APLS
1942
DELISTED
Apellis Pharmaceuticals
APLS
| $2.69M | ﹤0.01% |
+70,072
| New | +$3.17M |
|
1943
PUT
TransDigm Group
TDG
$69.2B
| $2.68M | ﹤0.01% |
2,100
+1,400
| +200% | +$1.79M |
|
1944
PUT
St. Joe Company
JOE
$3.57B
| $2.68M | ﹤0.01% |
49,000
-16,400
| -25% | -$923K |
|
1945
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.36B
| $2.67M | ﹤0.01% |
46,600
+38,500
| +475% | +$1.89M |
|
1946
Equity Residential
EQR
$25.4B
| $2.67M | ﹤0.01% |
38,499
+20,629
| +115% | +$1.34M |
|
1947
CALL
Cipher Digital
CIFR
$9.47B
| $2.66M | ﹤0.01% |
642,000
+224,500
| +54% | +$930K |
|
1948
Five Below
FIVE
$11.2B
| $2.66M | ﹤0.01% |
+24,434
| New | +$3.38M |
|
1949
CALL
Pentair
PNR
$10.2B
| $2.66M | ﹤0.01% |
34,700
-17,400
| -33% | -$1.4M |
|
1950
CALL
Landstar System
LSTR
$6.8B
| $2.66M | ﹤0.01% |
14,400
-3,900
| -21% | -$703K |
|
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.