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 | |
|---|---|---|---|---|---|---|
|
GATO
7551
CALL
DELISTED
Gatos Silver, Inc.
GATO
| $6K | ﹤0.01% |
6,400
+5,300
| +482% | +$86.3K |
|
7552
CALL
AC Immune
ACIU
$235M
| $5K | ﹤0.01% |
1,900
-14,400
| -88% | -$45K |
|
7553
CALL
Adaptive Biotechnologies
ADPT
$3.59B
| $5K | ﹤0.01% |
900
-100
| -10% | -$551 |
|
|
AFCG
7554
CALL
AFC Gamma
AFCG
$60M
| $5K | ﹤0.01% |
900
-2,300
| -72% | -$22.1K |
|
|
ALLK
7555
CALL
DELISTED
Allakos
ALLK
| $5K | ﹤0.01% |
+4,200
| New | +$4.41K |
|
7556
Ameresco
AMRC
$1.04B
| $5K | ﹤0.01% |
216
-592
| -73% | -$17.1K |
|
7557
America Movil
AMX
$77.2B
| $5K | ﹤0.01% |
+358
| New | +$5.54K |
|
7558
Apyx Medical
APYX
$163M
| $5K | ﹤0.01% |
3,767
+1,943
| +107% | +$2.72K |
|
7559
Arrow Electronics
ARW
$10.7B
| $5K | ﹤0.01% |
+46
| New | +$5.68K |
|
7560
ASP Isotopes
ASPI
$500M
| $5K | ﹤0.01% |
+1,279
| New | +$6.81K |
|
7561
CALL
Aterian
ATER
$4.19M
| $5K | ﹤0.01% |
26,100
-100
| -0.4% | -$266 |
|
7562
Banner Corp
BANR
$2.39B
| $5K | ﹤0.01% |
+89
| New | +$6.08K |
|
7563
CALL
Concrete Pumping Holdings
BBCP
$518M
| $5K | ﹤0.01% |
+900
| New | +$5.54K |
|
7564
Bright Horizons
BFAM
$4.25B
| $5K | ﹤0.01% |
+50
| New | +$6.01K |
|
7565
CALL
BGSF Inc
BGSF
$56.6M
| $5K | ﹤0.01% |
+1,000
| New | +$6.9K |
|
|
7566
BGSF Inc
BGSF
$56.6M
| $5K | ﹤0.01% |
1,012
-230
| -19% | -$1.59K |
|
|
7567
PUT
BGSF Inc
BGSF
$56.6M
| $5K | ﹤0.01% |
1,000
-200
| -17% | -$1.38K |
|
7568
Brighthouse Financial
BHF
$3.67B
| $5K | ﹤0.01% |
+117
| New | +$5.72K |
|
7569
CALL
Brookdale Senior Living
BKD
$3.65B
| $5K | ﹤0.01% |
1,000
-300
| -23% | -$1.72K |
|
7570
CALL
Boston Omaha
BOC
$438M
| $5K | ﹤0.01% |
400
-3,700
| -90% | -$55K |
|
7571
Popular Inc
BPOP
$11B
| $5K | ﹤0.01% |
+54
| New | +$5.18K |
|
|
BPT
7572
CALL
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $5K | ﹤0.01% |
9,600
-18,600
| -66% | -$18.8K |
|
|
SLAI
7573
PUT
DELISTED
SOLAI Ltd ADS
SLAI
| $5K | ﹤0.01% |
+286
| New | +$5.65K |
|
7574
Betterware México
BWMX
$638M
| $5K | ﹤0.01% |
+494
| New | +$6.05K |
|
7575
PUT
Cato Corp
CATO
$67.3M
| $5K | ﹤0.01% |
1,400
-1,200
| -46% | -$5.86K |
|
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.