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 | |
|---|---|---|---|---|---|---|
|
TPIC
7026
DELISTED
TPI Composites
TPIC
| $13K | ﹤0.01% |
+7,182
| New | +$20K |
|
7027
Upbound Group
UPBD
$1.22B
| $13K | ﹤0.01% |
+469
| New | +$14.6K |
|
|
VERV
7028
CALL
DELISTED
Verve Therapeutics
VERV
| $13K | ﹤0.01% |
+2,400
| New | +$13.5K |
|
7029
CALL
John Wiley & Sons Class A
WLY
$2.83B
| $13K | ﹤0.01% |
+300
| New | +$14.7K |
|
|
YMAB
7030
DELISTED
Y-mAbs Therapeutics
YMAB
| $13K | ﹤0.01% |
+1,783
| New | +$21.7K |
|
|
ZIMV
7031
PUT
DELISTED
ZimVie
ZIMV
| $13K | ﹤0.01% |
1,000
+800
| +400% | +$11.5K |
|
7032
CALL
BrightSpring Health Services
BTSG
$13.6B
| $13K | ﹤0.01% |
800
+200
| +33% | +$3.46K |
|
|
CTEV
7033
CALL
Claritev Corp
CTEV
$399M
| $13K | ﹤0.01% |
900
-5,000
| -85% | -$44.2K |
|
|
WHWK
7034
PUT
Whitehawk Therapeutics
WHWK
$181M
| $13K | ﹤0.01% |
4,400
+3,400
| +340% | +$7.7K |
|
7035
Adecoagro
AGRO
$1.4B
| $12K | ﹤0.01% |
+1,300
| New | +$14.2K |
|
7036
PUT
AAR Corp
AIR
$5.4B
| $12K | ﹤0.01% |
200
| – | – |
|
|
ALEX
7037
CALL
DELISTED
Alexander & Baldwin
ALEX
| $12K | ﹤0.01% |
700
-100
| -13% | -$1.89K |
|
|
API
7038
Agora
API
$333M
| $12K | ﹤0.01% |
2,984
+2,281
| +324% | +$9.36K |
|
7039
Digital Turbine
APPS
$982M
| $12K | ﹤0.01% |
+7,233
| New | +$16.1K |
|
7040
PUT
Arcos Dorados Holdings
ARCO
$1.74B
| $12K | ﹤0.01% |
1,700
-700
| -29% | -$6K |
|
7041
PUT
Brunswick
BC
$5.23B
| $12K | ﹤0.01% |
200
-1,300
| -87% | -$102K |
|
7042
CALL
Cato Corp
CATO
$65.7M
| $12K | ﹤0.01% |
+3,300
| New | +$16.1K |
|
7043
CALL
CareDx
CDNA
$1.83B
| $12K | ﹤0.01% |
600
-20,900
| -97% | -$508K |
|
7044
CALL
CEMIG Preferred Shares
CIG
$6.06B
| $12K | ﹤0.01% |
6,800
+5,200
| +325% | +$10.1K |
|
7045
Cellectar Biosciences
CLRB
$19.8M
| $12K | ﹤0.01% |
1,358
+1,344
| +9,600% | +$62.1K |
|
|
CMBM
7046
CALL
DELISTED
Cambium Networks
CMBM
| $12K | ﹤0.01% |
19,300
| – | – |
|
7047
CALL
CubeSmart
CUBE
$9.61B
| $12K | ﹤0.01% |
300
-200
| -40% | -$9.59K |
|
|
DSL
7048
CALL
DoubleLine Income Solutions Fund
DSL
$1.22B
| $12K | ﹤0.01% |
1,000
+900
| +900% | +$11.4K |
|
7049
PUT
Embecta
EMBC
$218M
| $12K | ﹤0.01% |
600
-3,100
| -84% | -$50.8K |
|
7050
PUT
Expensify
EXFY
$174M
| $12K | ﹤0.01% |
3,800
-500
| -12% | -$1.34K |
|
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.