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 | |
|---|---|---|---|---|---|---|
5076
PUT
Aldeyra Therapeutics
ALDX
$96.5M
| $110K | ﹤0.01% |
22,100
+3,900
| +21% | +$20K |
|
|
BZUN
5077
Baozun
BZUN
$173M
| $110K | ﹤0.01% |
+40,532
| New | +$123K |
|
5078
PUT
Cohen & Steers
CNS
$4.19B
| $110K | ﹤0.01% |
+1,200
| New | +$119K |
|
|
DDL
5079
CALL
Dingdong
DDL
$529M
| $110K | ﹤0.01% |
+33,700
| New | +$130K |
|
5080
Cedar Fair
FUN
$1.81B
| $110K | ﹤0.01% |
2,294
-1,248
| -35% | -$54.7K |
|
5081
CALL
IMAX
IMAX
$2.61B
| $110K | ﹤0.01% |
4,300
-100
| -2% | -$2.35K |
|
5082
Myomo
MYO
$38.6M
| $110K | ﹤0.01% |
17,098
+11,657
| +214% | +$56.7K |
|
5083
PUT
Resources Connection
RGP
$147M
| $110K | ﹤0.01% |
+12,900
| New | +$109K |
|
5084
Visteon
VC
$2.8B
| $110K | ﹤0.01% |
+1,243
| New | +$114K |
|
5085
XP
XP
$8.89B
| $110K | ﹤0.01% |
+9,312
| New | +$147K |
|
|
CVSA
5086
CALL
Covista Inc
CVSA
$4.3B
| $109K | ﹤0.01% |
1,200
-11,200
| -90% | -$937K |
|
5087
PUT
Cemex
CX
$17.2B
| $109K | ﹤0.01% |
19,400
+14,700
| +313% | +$83.5K |
|
|
DEA
5088
PUT
Easterly Government Properties
DEA
$1.15B
| $109K | ﹤0.01% |
3,840
+1,760
| +85% | +$55.9K |
|
|
HOUS
5089
PUT
DELISTED
Anywhere Real Estate
HOUS
| $109K | ﹤0.01% |
33,200
-96,600
| -74% | -$414K |
|
5090
Banco Santander
SAN
$202B
| $109K | ﹤0.01% |
23,986
+10,976
| +84% | +$52.8K |
|
5091
CALL
Solid Power
SLDP
$463M
| $109K | ﹤0.01% |
57,700
+55,700
| +2,785% | +$68.9K |
|
|
SVC
5092
PUT
Service Properties Trust
SVC
$1.04B
| $109K | ﹤0.01% |
8,620
+5,080
| +144% | +$82.1K |
|
5093
PUT
Teucrium Agricultural Fund
TAGS
$19M
| $109K | ﹤0.01% |
20,600
-59,000
| -74% | -$1.52M |
|
5094
PUT
Autohome
ATHM
$2.63B
| $108K | ﹤0.01% |
+4,200
| New | +$121K |
|
5095
PUT
Brookfield Infrastructure
BIPC
$5.24B
| $108K | ﹤0.01% |
2,700
-19,200
| -88% | -$808K |
|
|
CPRX
5096
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $108K | ﹤0.01% |
5,200
+3,600
| +225% | +$77.3K |
|
|
PEO
5097
CALL
Adams Natural Resources Fund
PEO
$742M
| $108K | ﹤0.01% |
5,000
-197
| -4% | -$4.49K |
|
|
CNH
5098
CNH Industrial
CNH
$12.8B
| $108K | ﹤0.01% |
9,556
-17,490
| -65% | -$199K |
|
5099
PUT
Arbutus Biopharma
ABUS
$871M
| $107K | ﹤0.01% |
33,000
+15,600
| +90% | +$57.4K |
|
5100
PUT
Artisan Partners
APAM
$2.82B
| $107K | ﹤0.01% |
2,500
+1,300
| +108% | +$59.4K |
|
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.