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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1926
Okta
OKTA
$24.1B
| $3.39M | ﹤0.01% |
32,426
+25,429
| +363% | +$2.35M |
|
1927
PUT
Intellia Therapeutics
NTLA
$1.5B
| $3.39M | ﹤0.01% |
123,200
+82,200
| +200% | +$2.28M |
|
1928
PUT
Moody's
MCO
$81.7B
| $3.38M | ﹤0.01% |
8,600
-6,400
| -43% | -$2.47M |
|
1929
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $3.37M | ﹤0.01% |
38,600
-14,200
| -27% | -$1.27M |
|
1930
PUT
Freshworks
FRSH
$2.84B
| $3.37M | ﹤0.01% |
184,900
+147,400
| +393% | +$3.05M |
|
1931
PUT
Cboe Global Markets
CBOE
$29.8B
| $3.36M | ﹤0.01% |
18,300
-57,700
| -76% | -$10.6M |
|
1932
Molson Coors Class B
TAP
$7.68B
| $3.36M | ﹤0.01% |
+49,933
| New | +$3.17M |
|
1933
PUT
IonQ
IONQ
$12.3B
| $3.35M | ﹤0.01% |
335,900
-157,500
| -32% | -$1.68M |
|
1934
PUT
Celanese
CE
$5.09B
| $3.35M | ﹤0.01% |
19,500
+11,800
| +153% | +$1.8M |
|
1935
Bausch Health
BHC
$1.65B
| $3.35M | ﹤0.01% |
+315,765
| New | +$2.76M |
|
|
SEE
1936
CALL
DELISTED
Sealed Air
SEE
| $3.34M | ﹤0.01% |
89,900
-24,200
| -21% | -$868K |
|
1937
PUT
GigaCloud Technology
GCT
$1.35B
| $3.33M | ﹤0.01% |
124,700
+63,600
| +104% | +$1.81M |
|
1938
CALL
Uranium Energy
UEC
$4.71B
| $3.33M | ﹤0.01% |
493,600
+370,700
| +302% | +$2.62M |
|
1939
PUT
Iovance Biotherapeutics
IOVA
$2.23B
| $3.33M | ﹤0.01% |
224,500
-124,200
| -36% | -$1.45M |
|
1940
CALL
Telephone and Data Systems
TDS
$3.91B
| $3.31M | ﹤0.01% |
206,400
+30,200
| +17% | +$515K |
|
1941
CALL
Star Bulk Carriers
SBLK
$3.14B
| $3.31M | ﹤0.01% |
138,500
+80,000
| +137% | +$1.81M |
|
1942
CALL
Stride
LRN
$3.69B
| $3.3M | ﹤0.01% |
52,400
-20,600
| -28% | -$1.24M |
|
|
CNH
1943
PUT
CNH Industrial
CNH
$13.8B
| $3.3M | ﹤0.01% |
254,900
-2,000
| -0.8% | -$24.2K |
|
1944
PUT
Vulcan Materials
VMC
$36.3B
| $3.3M | ﹤0.01% |
12,100
-4,000
| -25% | -$986K |
|
1945
PUT
New Oriental
EDU
$7.84B
| $3.3M | ﹤0.01% |
38,000
-82,700
| -69% | -$7.02M |
|
1946
PUT
Immersion
IMMR
$216M
| $3.3M | ﹤0.01% |
441,100
+436,300
| +9,090% | +$3.1M |
|
1947
PUT
Annaly Capital Management
NLY
$16.9B
| $3.29M | ﹤0.01% |
167,100
-26,000
| -13% | -$501K |
|
1948
ZTO Express
ZTO
$18.2B
| $3.29M | ﹤0.01% |
157,092
+40,451
| +35% | +$774K |
|
1949
PUT
Fortive
FTV
$19B
| $3.29M | ﹤0.01% |
50,691
+19,772
| +64% | +$1.2M |
|
1950
PUT
Barclays
BCS
$94.1B
| $3.27M | ﹤0.01% |
346,100
+25,900
| +8% | +$212K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.