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 | |
|---|---|---|---|---|---|---|
2051
CALL
ZipRecruiter
ZIP
$318M
| $2.36M | ﹤0.01% |
+259,300
| New | +$2.62M |
|
2052
GSK
GSK
$103B
| $2.35M | ﹤0.01% |
+61,149
| New | +$2.57M |
|
2053
CALL
Madison Square Garden
MSGS
$9.54B
| $2.35M | ﹤0.01% |
12,500
+6,700
| +116% | +$1.24M |
|
2054
CALL
DoubleVerify
DV
$1.62B
| $2.35M | ﹤0.01% |
120,600
+23,400
| +24% | +$565K |
|
2055
CALL
Sensata Technologies
ST
$6.65B
| $2.34M | ﹤0.01% |
62,700
+37,000
| +144% | +$1.43M |
|
2056
CALL
Fluence Energy
FLNC
$1.78B
| $2.34M | ﹤0.01% |
135,000
+1,300
| +1% | +$24.9K |
|
2057
Nutrien
NTR
$32.7B
| $2.34M | ﹤0.01% |
45,907
+33,889
| +282% | +$1.86M |
|
|
MAG
2058
CALL
DELISTED
MAG Silver
MAG
| $2.33M | ﹤0.01% |
199,700
+141,900
| +246% | +$1.78M |
|
2059
CALL
Steris
STE
$20.9B
| $2.33M | ﹤0.01% |
10,600
+9,600
| +960% | +$2.09M |
|
2060
PUT
Bread Financial
BFH
$4.21B
| $2.32M | ﹤0.01% |
52,100
-30,300
| -37% | -$1.19M |
|
2061
Teck Resources
TECK
$29.5B
| $2.32M | ﹤0.01% |
48,475
-69,355
| -59% | -$3.41M |
|
2062
Ardelyx
ARDX
$1.24B
| $2.32M | ﹤0.01% |
312,997
+170,348
| +119% | +$1.2M |
|
2063
PUT
Equinor
EQNR
$95.9B
| $2.32M | ﹤0.01% |
81,200
+29,200
| +56% | +$814K |
|
2064
Invesco
IVZ
$13.3B
| $2.32M | ﹤0.01% |
155,066
+107,348
| +225% | +$1.65M |
|
2065
PUT
Silicon Motion
SIMO
$9.19B
| $2.32M | ﹤0.01% |
28,600
-107,100
| -79% | -$8.37M |
|
2066
CALL
Virtu Financial
VIRT
$5.2B
| $2.32M | ﹤0.01% |
103,200
+20,600
| +25% | +$459K |
|
2067
PUT
Inspire Medical Systems
INSP
$1.42B
| $2.31M | ﹤0.01% |
17,300
-35,300
| -67% | -$6.68M |
|
2068
PUT
Alliant Energy
LNT
$19.4B
| $2.31M | ﹤0.01% |
45,500
-28,300
| -38% | -$1.42M |
|
2069
PUT
Alamos Gold
AGI
$12.4B
| $2.31M | ﹤0.01% |
147,500
-40,200
| -21% | -$629K |
|
2070
Baxter International
BAX
$11.6B
| $2.31M | ﹤0.01% |
69,021
-193,288
| -74% | -$7.12M |
|
2071
PUT
Nice
NICE
$5.29B
| $2.3M | ﹤0.01% |
13,400
-36,800
| -73% | -$7.57M |
|
|
EMBJ
2072
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $2.3M | ﹤0.01% |
89,200
-130,300
| -59% | -$3.53M |
|
2073
Lennar Class A
LEN
$20.4B
| $2.3M | ﹤0.01% |
+15,858
| New | +$2.41M |
|
2074
PUT
CVR Partners
UAN
$1.3B
| $2.3M | ﹤0.01% |
30,400
+18,800
| +162% | +$1.5M |
|
2075
PUT
Check Point Software Technologies
CHKP
$13.3B
| $2.29M | ﹤0.01% |
13,900
-4,700
| -25% | -$733K |
|
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.