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 | |
|---|---|---|---|---|---|---|
4426
Revolve Group
RVLV
$1.88B
| $217K | ﹤0.01% |
6,501
-2,121
| -25% | -$65.7K |
|
|
BDN
4427
PUT
Brandywine Realty Trust
BDN
$521M
| $216K | ﹤0.01% |
38,600
-7,300
| -16% | -$40.7K |
|
4428
CALL
DiaMedica Therapeutics
DMAC
$351M
| $216K | ﹤0.01% |
39,800
+100
| +0.3% | +$472 |
|
4429
CALL
NerdWallet
NRDS
$637M
| $216K | ﹤0.01% |
16,300
+13,800
| +552% | +$184K |
|
4430
CALL
The Honest Company
HNST
$419M
| $215K | ﹤0.01% |
31,100
-103,200
| -77% | -$584K |
|
|
4431
PUT
NerdWallet
NRDS
$637M
| $215K | ﹤0.01% |
16,200
+16,100
| +16,100% | +$215K |
|
4432
PUT
Reliance Steel & Aluminium
RS
$20.8B
| $215K | ﹤0.01% |
800
-3,100
| -79% | -$920K |
|
4433
CALL
Xeris Biopharma Holdings
XERS
$1.46B
| $215K | ﹤0.01% |
63,600
-13,400
| -17% | -$43.1K |
|
4434
Ceragon Networks
CRNT
$195M
| $214K | ﹤0.01% |
45,851
-16,262
| -26% | -$54.8K |
|
4435
Hayward Holdings
HAYW
$3.32B
| $214K | ﹤0.01% |
14,003
+13,932
| +19,623% | +$218K |
|
4436
PUT
Kimbell Royalty Partners
KRP
$1.45B
| $214K | ﹤0.01% |
13,200
-2,300
| -15% | -$36.9K |
|
4437
Planet Labs
PL
$7.35B
| $214K | ﹤0.01% |
53,052
-3,162
| -6% | -$9.81K |
|
4438
PUT
United Bankshares
UBSI
$6.74B
| $214K | ﹤0.01% |
5,700
-1,600
| -22% | -$63K |
|
4439
CALL
UFP Industries
UFPI
$5.01B
| $214K | ﹤0.01% |
1,900
+1,400
| +280% | +$180K |
|
4440
CALL
Digital Turbine
APPS
$1.03B
| $213K | ﹤0.01% |
126,300
+31,300
| +33% | +$69.7K |
|
4441
PUT
Blink Charging
BLNK
$68.9M
| $213K | ﹤0.01% |
153,600
-48,800
| -24% | -$86.2K |
|
4442
Americold
COLD
$4.27B
| $213K | ﹤0.01% |
9,999
+6,908
| +223% | +$167K |
|
|
AIV
4443
CALL
Aimco
AIV
$378M
| $212K | ﹤0.01% |
23,400
+17,800
| +318% | +$154K |
|
4444
PUT
ASE Group
ASX
$72.7B
| $212K | ﹤0.01% |
21,100
+19,600
| +1,307% | +$195K |
|
4445
Huazhu Hotels Group
HTHT
$13.4B
| $212K | ﹤0.01% |
+6,419
| New | +$232K |
|
|
IPG
4446
PUT
DELISTED
Interpublic Group of Companies
IPG
| $212K | ﹤0.01% |
7,600
+2,800
| +58% | +$83.6K |
|
4447
CALL
RCI Hospitality Holdings
RICK
$203M
| $212K | ﹤0.01% |
3,700
-8,900
| -71% | -$435K |
|
4448
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.6B
| $212K | ﹤0.01% |
+4,146
| New | +$221K |
|
|
SEI
4449
CALL
Solaris Energy Infrastructure
SEI
$2.8B
| $212K | ﹤0.01% |
7,400
+4,700
| +174% | +$93.5K |
|
4450
PUT
MarineMax
HZO
$762M
| $211K | ﹤0.01% |
7,300
+2,300
| +46% | +$70.6K |
|
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.