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 | |
|---|---|---|---|---|---|---|
6551
CALL
Agios Pharmaceuticals
AGIO
$1.79B
| $23K | ﹤0.01% |
700
-12,100
| -95% | -$568K |
|
|
ALEX
6552
DELISTED
Alexander & Baldwin
ALEX
| $23K | ﹤0.01% |
+1,343
| New | +$25.3K |
|
6553
Accuray
ARAY
$32.1M
| $23K | ﹤0.01% |
11,867
+8,294
| +232% | +$15.7K |
|
6554
Arbe Robotics
ARBE
$80.4M
| $23K | ﹤0.01% |
+12,529
| New | +$22.8K |
|
6555
CALL
BrightView Holdings
BV
$1.22B
| $23K | ﹤0.01% |
+1,500
| New | +$25K |
|
6556
Claros Mortgage Trust
CMTG
$248M
| $23K | ﹤0.01% |
5,180
+5,110
| +7,300% | +$31.8K |
|
6557
CALL
Americold
COLD
$4.02B
| $23K | ﹤0.01% |
1,100
-100
| -8% | -$2.42K |
|
6558
Carter's
CRI
$1.43B
| $23K | ﹤0.01% |
427
-329
| -44% | -$18.8K |
|
6559
PUT
Castle Biosciences
CSTL
$840M
| $23K | ﹤0.01% |
900
-900
| -50% | -$27.4K |
|
6560
CALL
CXApp
CXAI
$13.7M
| $23K | ﹤0.01% |
13,000
-1,100
| -8% | -$1.76K |
|
6561
Crexendo
CXDO
$223M
| $23K | ﹤0.01% |
4,485
+4,004
| +832% | +$21.2K |
|
6562
Fidelity MSCI Consumer Discretionary Index ETF
FDIS
$1.68B
| $23K | ﹤0.01% |
243
+105
| +76% | +$9.84K |
|
6563
Galectin Therapeutics
GALT
$195M
| $23K | ﹤0.01% |
17,984
+8,194
| +84% | +$19.6K |
|
6564
CALL
HCI Group
HCI
$2.23B
| $23K | ﹤0.01% |
+200
| New | +$22.8K |
|
6565
CALL
Heron Therapeutics
HRTX
$93M
| $23K | ﹤0.01% |
15,600
-11,400
| -42% | -$18.5K |
|
6566
Ironwood Pharmaceuticals
IRWD
$693M
| $23K | ﹤0.01% |
5,360
-3,467
| -39% | -$14.1K |
|
6567
PUT
Coca-Cola Femsa
KOF
$22.7B
| $23K | ﹤0.01% |
300
+200
| +200% | +$16.5K |
|
6568
PUT
Lands' End
LE
$371M
| $23K | ﹤0.01% |
+1,800
| New | +$28.2K |
|
6569
PUT
LoveSac
LOVE
$235M
| $23K | ﹤0.01% |
1,000
-1,900
| -66% | -$56.9K |
|
6570
CALL
MeiraGTx Holdings
MGTX
$1.09B
| $23K | ﹤0.01% |
3,900
+3,000
| +333% | +$17.6K |
|
6571
Marcus & Millichap
MMI
$1.16B
| $23K | ﹤0.01% |
+622
| New | +$24.4K |
|
6572
Phreesia
PHR
$664M
| $23K | ﹤0.01% |
928
-2,160
| -70% | -$46.1K |
|
6573
Prelude Therapeutics
PRLD
$367M
| $23K | ﹤0.01% |
18,814
+9,482
| +102% | +$12.6K |
|
|
QIPT
6574
CALL
DELISTED
Quipt Home Medical
QIPT
| $23K | ﹤0.01% |
+7,700
| New | +$20.7K |
|
6575
PUT
QuickLogic
QUIK
$232M
| $23K | ﹤0.01% |
2,100
+1,200
| +133% | +$9.74K |
|
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.