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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1851
PUT
GoDaddy
GDDY
$12.3B
| $2.98M | ﹤0.01% |
15,100
-54,700
| -78% | -$10M |
|
1852
Invesco S&P 500 Equal Weight ETF
RSP
$96.1B
| $2.98M | ﹤0.01% |
+16,996
| New | +$3.07M |
|
|
SMAR
1853
PUT
DELISTED
Smartsheet Inc.
SMAR
| $2.98M | ﹤0.01% |
53,100
-19,100
| -26% | -$1.07M |
|
1854
PUT
Cinemark Holdings
CNK
$3.82B
| $2.97M | ﹤0.01% |
96,000
+61,100
| +175% | +$1.89M |
|
1855
PUT
Sysco
SYY
$39.7B
| $2.97M | ﹤0.01% |
38,800
+21,100
| +119% | +$1.62M |
|
1856
Gilead Sciences
GILD
$161B
| $2.96M | ﹤0.01% |
32,076
-27,777
| -46% | -$2.5M |
|
1857
PUT
Teladoc Health
TDOC
$1.58B
| $2.96M | ﹤0.01% |
325,900
+23,500
| +8% | +$227K |
|
1858
First Horizon
FHN
$12.1B
| $2.96M | ﹤0.01% |
146,930
+58,777
| +67% | +$1.11M |
|
1859
CALL
Hecla Mining
HL
$10.2B
| $2.96M | ﹤0.01% |
602,800
-28,000
| -4% | -$167K |
|
1860
PUT
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $2.96M | ﹤0.01% |
11,900
+6,700
| +129% | +$423K |
|
1861
PUT
CBRE Group
CBRE
$40.8B
| $2.95M | ﹤0.01% |
22,500
+13,400
| +147% | +$1.75M |
|
1862
PUT
Jackson Financial
JXN
$8.32B
| $2.95M | ﹤0.01% |
33,900
+31,700
| +1,441% | +$3.1M |
|
|
AXON
1863
Axon Enterprise
AXON
$40.5B
| $2.95M | ﹤0.01% |
+4,964
| New | +$2.7M |
|
1864
CALL
Helen of Troy
HELE
$663M
| $2.95M | ﹤0.01% |
49,300
+13,700
| +38% | +$911K |
|
|
RDFN
1865
PUT
DELISTED
Redfin
RDFN
| $2.95M | ﹤0.01% |
374,800
-337,500
| -47% | -$3.27M |
|
1866
PUT
Martin Marietta Materials
MLM
$33.6B
| $2.94M | ﹤0.01% |
5,700
+4,100
| +256% | +$2.33M |
|
1867
PUT
Pilgrim's Pride
PPC
$6.82B
| $2.94M | ﹤0.01% |
64,800
+29,600
| +84% | +$1.44M |
|
1868
CALL
Atour Lifestyle Holdings
ATAT
$4.35B
| $2.94M | ﹤0.01% |
109,300
+104,200
| +2,043% | +$2.8M |
|
1869
CALL
Guardant Health
GH
$19.5B
| $2.93M | ﹤0.01% |
96,000
+48,000
| +100% | +$1.35M |
|
1870
PUT
Neumora Therapeutics
NMRA
$276M
| $2.93M | ﹤0.01% |
276,600
+265,900
| +2,485% | +$3.19M |
|
1871
PUT
Beyond Meat
BYND
$288M
| $2.93M | ﹤0.01% |
778,800
+16,000
| +2% | +$85K |
|
1872
Cameco
CCJ
$38.3B
| $2.92M | ﹤0.01% |
+56,796
| New | +$3.09M |
|
1873
PUT
BigBear.ai
BBAI
$1.32B
| $2.92M | ﹤0.01% |
655,700
+387,100
| +144% | +$876K |
|
1874
CALL
Fastly Inc
FSLY
$3.17B
| $2.91M | ﹤0.01% |
308,600
+229,500
| +290% | +$1.91M |
|
1875
CALL
Equinor
EQNR
$95.9B
| $2.91M | ﹤0.01% |
122,700
+43,900
| +56% | +$1.06M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.