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 | |
|---|---|---|---|---|---|---|
3276
PUT
Toro Company
TTC
$9.01B
| $648K | ﹤0.01% |
8,100
+3,800
| +88% | +$319K |
|
3277
BioNTech
BNTX
$23B
| $647K | ﹤0.01% |
5,682
-43,005
| -88% | -$4.91M |
|
3278
CALL
Polestar Automotive Holding UK
PSNY
$2.04B
| $646K | ﹤0.01% |
20,513
+6,773
| +49% | +$246K |
|
3279
PUT
Yelp
YELP
$1.45B
| $646K | ﹤0.01% |
16,700
+7,800
| +88% | +$285K |
|
3280
General Motors
GM
$78.7B
| $644K | ﹤0.01% |
12,105
-157,336
| -93% | -$8.24M |
|
3281
PUT
Grab
GRAB
$13.7B
| $644K | ﹤0.01% |
136,500
-352,100
| -72% | -$1.6M |
|
3282
PUT
Planet Labs
PL
$7.48B
| $644K | ﹤0.01% |
159,500
+83,800
| +111% | +$260K |
|
3283
iRhythm Holdings
IRTC
$3.69B
| $643K | ﹤0.01% |
7,139
-14,666
| -67% | -$1.15M |
|
3284
Plains All American Pipeline
PAA
$17.1B
| $643K | ﹤0.01% |
+37,694
| New | +$656K |
|
3285
CALL
Amer Sports
AS
$20.5B
| $643K | ﹤0.01% |
23,000
+21,200
| +1,178% | +$467K |
|
3286
PUT
Huntington Ingalls Industries
HII
$11.4B
| $642K | ﹤0.01% |
3,400
+1,500
| +79% | +$324K |
|
|
HUYA
3287
PUT
Huya Inc
HUYA
$558M
| $641K | ﹤0.01% |
208,900
+182,600
| +694% | +$648K |
|
3288
CALL
Ocular Therapeutix
OCUL
$1.89B
| $641K | ﹤0.01% |
75,100
+53,400
| +246% | +$521K |
|
3289
PUT
BBVA Argentina
BBAR
$3.92B
| $640K | ﹤0.01% |
33,600
+4,200
| +14% | +$63.8K |
|
3290
CALL
Ceragon Networks
CRNT
$197M
| $639K | ﹤0.01% |
137,000
+135,000
| +6,750% | +$455K |
|
3291
CALL
Satellogic
SATL
$525M
| $639K | ﹤0.01% |
+224,400
| New | +$410K |
|
|
MAPS
3292
CALL
DELISTED
WM TECHNOLOGY INC A
MAPS
| $638K | ﹤0.01% |
462,800
+7,400
| +2% | +$7.96K |
|
3293
Target Hospitality
TH
$1.6B
| $637K | ﹤0.01% |
65,943
-11,229
| -15% | -$93.9K |
|
3294
CALL
PACS Group
PACS
$7.45B
| $637K | ﹤0.01% |
48,600
+48,200
| +12,050% | +$1.24M |
|
|
AKRO
3295
DELISTED
Akero Therapeutics
AKRO
| $635K | ﹤0.01% |
+22,855
| New | +$692K |
|
|
CTLP
3296
DELISTED
Cantaloupe
CTLP
| $634K | ﹤0.01% |
66,676
+41,391
| +164% | +$377K |
|
|
MAXN
3297
PUT
DELISTED
Maxeon Solar Technologies
MAXN
| $634K | ﹤0.01% |
84,100
+76,282
| +976% | +$591K |
|
3298
CALL
Mueller Industries
MLI
$14.2B
| $634K | ﹤0.01% |
16,000
+11,400
| +248% | +$463K |
|
3299
PUT
3D Systems Corp
DDD
$430M
| $631K | ﹤0.01% |
192,400
+168,900
| +719% | +$538K |
|
3300
Ecopetrol
EC
$32.5B
| $630K | ﹤0.01% |
79,619
+28,798
| +57% | +$232K |
|
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.