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 | |
|---|---|---|---|---|---|---|
8001
PUT
GH Research
GHRS
$1.87B
| $2K | ﹤0.01% |
+400
| New | +$3.22K |
|
8002
PUT
Gran Tierra Energy
GTE
$260M
| $2K | ﹤0.01% |
2,000
-5,500
| -73% | -$35.8K |
|
8003
PUT
Hudbay
HBM
$9.92B
| $2K | ﹤0.01% |
300
-14,000
| -98% | -$126K |
|
8004
CALL
HBT Financial
HBT
$1.21B
| $2K | ﹤0.01% |
+100
| New | +$2.28K |
|
8005
Hackett Group
HCKT
$245M
| $2K | ﹤0.01% |
+67
| New | +$1.94K |
|
8006
Global X Video Games & Esports ETF
HERO
$60.4M
| $2K | ﹤0.01% |
+94
| New | +$2.25K |
|
8007
Werewolf Therapeutics
HOWL
$20.8M
| $2K | ﹤0.01% |
1,634
-1,805
| -52% | -$3.68K |
|
|
8008
PUT
Werewolf Therapeutics
HOWL
$20.8M
| $2K | ﹤0.01% |
+1,500
| New | +$3.06K |
|
8009
Ichor Holdings
ICHR
$3.02B
| $2K | ﹤0.01% |
86
-152
| -64% | -$4.7K |
|
|
IGMS
8010
CALL
DELISTED
IGM Biosciences
IGMS
| $2K | ﹤0.01% |
400
-100
| -20% | -$1.19K |
|
8011
CALL
Insteel Industries
IIIN
$633M
| $2K | ﹤0.01% |
100
-100
| -50% | -$2.91K |
|
8012
CALL
Jakks Pacific
JAKK
$280M
| $2K | ﹤0.01% |
100
-2,000
| -95% | -$54.8K |
|
8013
PUT
Jasper Therapeutics
JSPR
$22.9M
| $2K | ﹤0.01% |
100
-900
| -90% | -$18.7K |
|
8014
PUT
Kite Realty
KRG
$5.95B
| $2K | ﹤0.01% |
100
-900
| -90% | -$23.7K |
|
8015
CALL
Key Tronic
KTCC
$40.3M
| $2K | ﹤0.01% |
700
-1,400
| -67% | -$7.6K |
|
|
KZR
8016
DELISTED
Kezar Life Sciences
KZR
| $2K | ﹤0.01% |
400
+21
| +6% | +$156 |
|
8017
PUT
Lifecore Biomedical
LFCR
$162M
| $2K | ﹤0.01% |
400
-3,700
| -90% | -$23.6K |
|
8018
Lindblad Expeditions
LIND
$1.76B
| $2K | ﹤0.01% |
201
-1,386
| -87% | -$15.9K |
|
8019
LoveSac
LOVE
$239M
| $2K | ﹤0.01% |
91
-981
| -92% | -$29.4K |
|
|
CYPH
8020
PUT
Cypherpunk Technologies Inc
CYPH
$66.2M
| $2K | ﹤0.01% |
800
+400
| +100% | +$1.19K |
|
8021
LXP Industrial Trust
LXP
$3.53B
| $2K | ﹤0.01% |
+61
| New | +$2.83K |
|
8022
PUT
Lexicon Pharmaceuticals
LXRX
$1.02B
| $2K | ﹤0.01% |
+3,400
| New | +$4.1K |
|
8023
Marchex
MCHX
$79.7M
| $2K | ﹤0.01% |
+1,685
| New | +$3.11K |
|
8024
MarketWise
MKTW
$53.1M
| $2K | ﹤0.01% |
+181
| New | +$2.02K |
|
|
8025
PUT
MarketWise
MKTW
$53.1M
| $2K | ﹤0.01% |
230
-150
| -39% | -$1.67K |
|
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.