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 | |
|---|---|---|---|---|---|---|
1826
PUT
Invitation Homes
INVH
$17.7B
| $3.78M | ﹤0.01% |
106,200
+64,900
| +157% | +$2.2M |
|
1827
CALL
Brookfield Asset Management
BAM
$74B
| $3.78M | ﹤0.01% |
89,900
+72,700
| +423% | +$2.94M |
|
1828
CALL
Weyerhaeuser
WY
$17.3B
| $3.78M | ﹤0.01% |
105,200
+46,400
| +79% | +$1.57M |
|
1829
DaVita
DVA
$15.1B
| $3.77M | ﹤0.01% |
27,352
-32,834
| -55% | -$3.94M |
|
|
COOP
1830
CALL
DELISTED
Mr. Cooper
COOP
| $3.77M | ﹤0.01% |
48,400
+1,700
| +4% | +$118K |
|
1831
PUT
Axcelis
ACLS
$4.12B
| $3.77M | ﹤0.01% |
33,800
+5,900
| +21% | +$703K |
|
1832
Bilibili
BILI
$7.18B
| $3.76M | ﹤0.01% |
335,704
+267,791
| +394% | +$2.81M |
|
|
PR
1833
PUT
Permian Resources
PR
$17.9B
| $3.76M | ﹤0.01% |
212,900
-43,000
| -17% | -$631K |
|
1834
CALL
MSCI
MSCI
$40B
| $3.75M | ﹤0.01% |
6,700
-21,700
| -76% | -$12.2M |
|
|
CHGX
1835
CALL
DELISTED
AXS Change Finance ESG ETF
CHGX
| $3.75M | ﹤0.01% |
140,900
+68,600
| +95% | +$2.39M |
|
1836
Public Service Enterprise Group
PEG
$39.8B
| $3.75M | ﹤0.01% |
56,201
+46,736
| +494% | +$2.86M |
|
1837
CALL
UFP Industries
UFPI
$4.97B
| $3.75M | ﹤0.01% |
30,500
-14,300
| -32% | -$1.66M |
|
1838
PUT
Mid-America Apartment Communities
MAA
$15.6B
| $3.75M | ﹤0.01% |
28,500
+7,800
| +38% | +$1.01M |
|
|
ANSS
1839
CALL
DELISTED
Ansys
ANSS
| $3.75M | ﹤0.01% |
10,800
-11,300
| -51% | -$3.83M |
|
1840
CALL
Boston Beer
SAM
$1.88B
| $3.74M | ﹤0.01% |
12,300
+7,100
| +137% | +$2.37M |
|
1841
PUT
Allegro MicroSystems
ALGM
$8.58B
| $3.74M | ﹤0.01% |
138,800
-178,000
| -56% | -$5.14M |
|
1842
CALL
Sigma Lithium
SGML
$1.08B
| $3.74M | ﹤0.01% |
288,600
-247,000
| -46% | -$4.41M |
|
1843
iShares US Real Estate ETF
IYR
$4.59B
| $3.74M | ﹤0.01% |
+41,596
| New | +$3.68M |
|
1844
PUT
MP Materials
MP
$7.35B
| $3.74M | ﹤0.01% |
261,500
+40,200
| +18% | +$636K |
|
1845
Lamb Weston
LW
$6.82B
| $3.73M | ﹤0.01% |
+35,031
| New | +$3.65M |
|
1846
International Flavors & Fragrances
IFF
$19.4B
| $3.73M | ﹤0.01% |
+43,374
| New | +$3.48M |
|
1847
PUT
Casey's General Stores
CASY
$31.9B
| $3.73M | ﹤0.01% |
11,700
+3,800
| +48% | +$1.11M |
|
1848
PUT
Alliant Energy
LNT
$19.4B
| $3.72M | ﹤0.01% |
73,800
+33,200
| +82% | +$1.63M |
|
1849
PUT
Gen Digital
GEN
$15.6B
| $3.71M | ﹤0.01% |
165,800
+87,700
| +112% | +$1.94M |
|
1850
CALL
iQIYI
IQ
$1.18B
| $3.7M | ﹤0.01% |
875,700
+487,100
| +125% | +$1.87M |
|
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.