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 | |
|---|---|---|---|---|---|---|
|
NVX
6951
CALL
NOVONIX
NVX
$91.5M
| $14K | ﹤0.01% |
+8,300
| New | +$16.1K |
|
|
ONL
6952
CALL
Orion Office REIT
ONL
$151M
| $14K | ﹤0.01% |
3,800
+2,200
| +138% | +$8.66K |
|
6953
Offerpad Solutions
OPAD
$18.5M
| $14K | ﹤0.01% |
496
+488
| +6,100% | +$17.5K |
|
6954
CALL
Organogenesis Holdings
ORGO
$324M
| $14K | ﹤0.01% |
+4,500
| New | +$15.1K |
|
6955
PUT
Pembina Pipeline
PBA
$29.3B
| $14K | ﹤0.01% |
400
-1,700
| -81% | -$69.3K |
|
6956
Global X US Preferred ETF
PFFD
$2.13B
| $14K | ﹤0.01% |
+723
| New | +$14.7K |
|
6957
PUT
Park Aerospace
PKE
$720M
| $14K | ﹤0.01% |
+1,000
| New | +$14.4K |
|
6958
CALL
ePlus
PLUS
$2.43B
| $14K | ﹤0.01% |
200
| – | – |
|
6959
PRA Group
PRAA
$672M
| $14K | ﹤0.01% |
671
+102
| +18% | +$2.18K |
|
6960
PUT
Arcus Biosciences
RCUS
$3.33B
| $14K | ﹤0.01% |
1,000
-600
| -38% | -$9.8K |
|
6961
PUT
Sabesp
SBS
$18.4B
| $14K | ﹤0.01% |
5,157
| – | – |
|
6962
PUT
SES AI
SES
$187M
| $14K | ﹤0.01% |
+6,800
| New | +$3.88K |
|
6963
PUT
Latham Group
SWIM
$660M
| $14K | ﹤0.01% |
2,100
| – | – |
|
6964
CALL
TIM SA
TIMB
$9.1B
| $14K | ﹤0.01% |
1,200
+600
| +100% | +$8.43K |
|
6965
CALL
Timken Company
TKR
$9.19B
| $14K | ﹤0.01% |
200
-2,100
| -91% | -$165K |
|
6966
CALL
Treace Medical Concepts
TMCI
$262M
| $14K | ﹤0.01% |
2,000
-45,400
| -96% | -$304K |
|
6967
PUT
Vanguard FTSE Developed Markets ETF
VEA
$223B
| $14K | ﹤0.01% |
300
-1,000
| -77% | -$50.2K |
|
6968
Kyverna Therapeutics
KYTX
$430M
| $14K | ﹤0.01% |
+3,765
| New | +$18K |
|
6969
CALL
Loar Holdings
LOAR
$6.23B
| $14K | ﹤0.01% |
200
-29,000
| -99% | -$2.38M |
|
|
SBDS
6970
DELISTED
Solo Brands Inc
SBDS
| $14K | ﹤0.01% |
312
-2,561
| -89% | -$127K |
|
6971
Adicet Bio
ACET
$77.6M
| $13K | ﹤0.01% |
905
+504
| +126% | +$9.51K |
|
6972
PUT
Acacia Research
ACTG
$437M
| $13K | ﹤0.01% |
3,100
+900
| +41% | +$4.08K |
|
6973
Federal Agricultural Mortgage
AGM
$2.32B
| $13K | ﹤0.01% |
70
+45
| +180% | +$8.93K |
|
6974
CALL
Agilysys
AGYS
$3.21B
| $13K | ﹤0.01% |
100
-300
| -75% | -$36.7K |
|
6975
PUT
Airgain
AIRG
$71.1M
| $13K | ﹤0.01% |
+1,900
| New | +$16.6K |
|
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.