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 | |
|---|---|---|---|---|---|---|
|
DAWN
4351
CALL
DELISTED
Day One Biopharmaceuticals
DAWN
| $234K | ﹤0.01% |
18,500
+15,300
| +478% | +$213K |
|
4352
CALL
Radian Group
RDN
$5.31B
| $234K | ﹤0.01% |
7,400
+5,800
| +363% | +$197K |
|
|
SHCO
4353
PUT
DELISTED
Soho House & Co
SHCO
| $234K | ﹤0.01% |
31,500
+20,800
| +194% | +$113K |
|
4354
CALL
Alpha and Omega Semiconductor
AOSL
$815M
| $233K | ﹤0.01% |
6,300
+500
| +9% | +$18.6K |
|
4355
PUT
Beam Therapeutics
BEAM
$2.65B
| $233K | ﹤0.01% |
9,400
+5,600
| +147% | +$143K |
|
4356
Compass Minerals
CMP
$1.21B
| $233K | ﹤0.01% |
+20,779
| New | +$271K |
|
4357
PUT
TORM
TRMD
$3.06B
| $233K | ﹤0.01% |
12,000
-57,600
| -83% | -$1.4M |
|
4358
PUT
HUTCHMED
HCM
$1.96B
| $232K | ﹤0.01% |
+16,100
| New | +$288K |
|
4359
CALL
James River Group Holdings
JRVR
$220M
| $232K | ﹤0.01% |
47,700
+21,400
| +81% | +$118K |
|
4360
CALL
Ecopetrol
EC
$33.5B
| $231K | ﹤0.01% |
29,200
-82,100
| -74% | -$661K |
|
4361
CALL
Lamar Advertising Co
LAMR
$16.6B
| $231K | ﹤0.01% |
1,900
| – | – |
|
4362
Marqeta
MQ
$1.92B
| $231K | ﹤0.01% |
15,283
+3,953
| +35% | +$69.4K |
|
4363
CALL
UroGen Pharma
URGN
$1.97B
| $231K | ﹤0.01% |
21,700
+20,000
| +1,176% | +$239K |
|
4364
CALL
Xenon Pharmaceuticals
XENE
$6.19B
| $231K | ﹤0.01% |
5,900
-11,100
| -65% | -$459K |
|
4365
Neonode
NEON
$12.6M
| $230K | ﹤0.01% |
28,011
+724
| +3% | +$5.56K |
|
4366
PUT
Rentokil
RTO
$14.9B
| $230K | ﹤0.01% |
9,100
-4,800
| -35% | -$122K |
|
4367
PUT
Bio-Techne
TECH
$11.2B
| $230K | ﹤0.01% |
3,200
-600
| -16% | -$44.1K |
|
4368
Travere Therapeutics
TVTX
$5.14B
| $230K | ﹤0.01% |
13,242
-27,219
| -67% | -$481K |
|
4369
CALL
Absci
ABSI
$1.17B
| $229K | ﹤0.01% |
87,600
-41,900
| -32% | -$147K |
|
4370
ITT
ITT
$16.9B
| $229K | ﹤0.01% |
1,604
-1,304
| -45% | -$195K |
|
4371
CALL
Methanex
MEOH
$4.05B
| $229K | ﹤0.01% |
4,600
-22,200
| -83% | -$976K |
|
4372
Rayonier Advanced Materials
RYAM
$571M
| $229K | ﹤0.01% |
27,797
+1,166
| +4% | +$9.81K |
|
4373
ProShares VIX Mid-Term Futures ETF
VIXM
$56.4M
| $229K | ﹤0.01% |
+15,853
| New | +$232K |
|
4374
AMC Global Media
AMCX
$459M
| $228K | ﹤0.01% |
23,083
-2,294
| -9% | -$20.3K |
|
4375
CALL
Annovis Bio
ANVS
$72.3M
| $228K | ﹤0.01% |
45,400
+37,600
| +482% | +$272K |
|
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.