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 | |
|---|---|---|---|---|---|---|
|
LAND
4576
Gladstone Land Corp
LAND
$365M
| $188K | ﹤0.01% |
17,416
+14,591
| +516% | +$181K |
|
4577
Mueller Industries
MLI
$14.5B
| $188K | ﹤0.01% |
4,742
-742
| -14% | -$30.2K |
|
4578
PUT
Trinity Capital Inc.
TRIN
$1.58B
| $188K | ﹤0.01% |
13,000
+2,300
| +21% | +$32.4K |
|
4579
Aviat Networks
AVNW
$253M
| $187K | ﹤0.01% |
+10,368
| New | +$190K |
|
4580
CALL
Credit Acceptance
CACC
$5.82B
| $187K | ﹤0.01% |
400
-1,900
| -83% | -$881K |
|
4581
CALL
Caribou Biosciences
CRBU
$146M
| $187K | ﹤0.01% |
118,000
+108,200
| +1,104% | +$218K |
|
4582
LifeVantage
LFVN
$80.1M
| $187K | ﹤0.01% |
10,706
+1,742
| +19% | +$24.4K |
|
|
SA
4583
Seabridge Gold
SA
$2.72B
| $187K | ﹤0.01% |
16,474
-102,802
| -86% | -$1.58M |
|
4584
Teleflex
TFX
$5.96B
| $187K | ﹤0.01% |
1,051
-2,667
| -72% | -$548K |
|
4585
PUT
Global X S&P 500 Tail Risk ETF
XTR
$4.71M
| $187K | ﹤0.01% |
3,400
-3,400
| -50% | -$112K |
|
4586
CALL
AGCO
AGCO
$8.41B
| $186K | ﹤0.01% |
2,000
-10,000
| -83% | -$968K |
|
4587
PUT
ARK 21Shares Bitcoin ETF
ARKB
$2.42B
| $186K | ﹤0.01% |
+6,000
| New | +$166K |
|
|
MCHB
4588
PUT
Mechanics Bancorp
MCHB
$3.65B
| $186K | ﹤0.01% |
16,300
+15,100
| +1,258% | +$187K |
|
4589
Omnicell
OMCL
$1.88B
| $186K | ﹤0.01% |
4,180
+3,605
| +627% | +$162K |
|
4590
Qorvo
QRVO
$7.9B
| $186K | ﹤0.01% |
+2,665
| New | +$213K |
|
4591
CALL
Vericel Corp
VCEL
$2.38B
| $186K | ﹤0.01% |
3,400
-1,300
| -28% | -$65.8K |
|
4592
CALL
Lifestance Health
LFST
$4.15B
| $185K | ﹤0.01% |
168,000
+26,300
| +19% | +$189K |
|
4593
CALL
Arcturus Therapeutics
ARCT
$165M
| $184K | ﹤0.01% |
10,900
+7,200
| +195% | +$136K |
|
4594
Equifax
EFX
$22B
| $184K | ﹤0.01% |
+725
| New | +$194K |
|
4595
PUT
GoPro
GPRO
$120M
| $184K | ﹤0.01% |
169,400
-7,500
| -4% | -$9.53K |
|
4596
VanEck Uranium + Nuclear Energy ETF
NLR
$3.67B
| $184K | ﹤0.01% |
+2,268
| New | +$203K |
|
4597
CALL
Suburban Propane Partners
SPH
$1.21B
| $184K | ﹤0.01% |
10,700
-11,800
| -52% | -$217K |
|
4598
CALL
Toro Company
TTC
$8.79B
| $184K | ﹤0.01% |
2,300
-51,300
| -96% | -$4.3M |
|
4599
PUT
Banco Macro
BMA
$5.81B
| $183K | ﹤0.01% |
1,900
-15,900
| -89% | -$1.3M |
|
4600
Guardant Health
GH
$19.1B
| $183K | ﹤0.01% |
+5,992
| New | +$169K |
|
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.