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 | |
|---|---|---|---|---|---|---|
|
NVEE
5326
PUT
DELISTED
NV5 Global
NVEE
| $86K | ﹤0.01% |
+4,600
| New | +$101K |
|
5327
OptimizeRx
OPRX
$114M
| $86K | ﹤0.01% |
17,833
+14,748
| +478% | +$82.4K |
|
|
PPTA
5328
PUT
Perpetua Resources
PPTA
$2.3B
| $86K | ﹤0.01% |
8,100
+5,100
| +170% | +$52.3K |
|
5329
PUT
AerSale
ASLE
$293M
| $85K | ﹤0.01% |
13,600
-12,000
| -47% | -$68.8K |
|
5330
Cushman & Wakefield Ltd
CWK
$3.14B
| $85K | ﹤0.01% |
+6,546
| New | +$90.9K |
|
5331
PUT
Dana Inc
DAN
$2.9B
| $85K | ﹤0.01% |
7,400
+1,600
| +28% | +$16.6K |
|
|
FFWM
5332
PUT
DELISTED
First Foundation Inc
FFWM
| $85K | ﹤0.01% |
13,800
-11,700
| -46% | -$84.4K |
|
5333
PUT
Fomento Económico Mexicano
FMX
$43.6B
| $85K | ﹤0.01% |
1,000
-1,900
| -66% | -$176K |
|
5334
Green Brick Partners
GRBK
$3.04B
| $85K | ﹤0.01% |
+1,521
| New | +$108K |
|
5335
Enviri
NVRI
$623M
| $85K | ﹤0.01% |
11,044
-17,983
| -62% | -$150K |
|
|
WCN
5336
CALL
Waste Connections
WCN
$42.2B
| $85K | ﹤0.01% |
500
-1,100
| -69% | -$200K |
|
|
ACLX
5337
PUT
DELISTED
Arcellx
ACLX
| $84K | ﹤0.01% |
1,100
-14,300
| -93% | -$1.24M |
|
5338
AudioEye
AEYE
$72.3M
| $84K | ﹤0.01% |
5,578
+1,458
| +35% | +$33.3K |
|
5339
CALL
Atlanta Braves Holdings Series B
BATRK
$3.26B
| $84K | ﹤0.01% |
2,100
-2,000
| -49% | -$79.7K |
|
|
SRTA
5340
CALL
Strata Critical Medical Inc
SRTA
$434M
| $84K | ﹤0.01% |
19,900
+19,300
| +3,217% | +$73.5K |
|
5341
CALL
Home BancShares
HOMB
$6.23B
| $84K | ﹤0.01% |
3,000
+2,200
| +275% | +$63.5K |
|
5342
CALL
X4 Pharmaceuticals
XFOR
$375M
| $84K | ﹤0.01% |
3,837
+3,040
| +381% | +$48.5K |
|
|
BMTX
5343
PUT
DELISTED
BM Technologies, Inc.
BMTX
| $84K | ﹤0.01% |
17,200
-27,400
| -61% | -$119K |
|
5344
PUT
Icon
ICLR
$12.6B
| $83K | ﹤0.01% |
400
-1,200
| -75% | -$280K |
|
5345
PUT
International General Insurance
IGIC
$1.19B
| $83K | ﹤0.01% |
3,500
+1,500
| +75% | +$34.2K |
|
5346
iShares Russell 3000 ETF
IWV
$19.6B
| $83K | ﹤0.01% |
250
-466
| -65% | -$157K |
|
|
5347
KraneShares CSI China Internet ETF
KWEB
$5.64B
| $83K | ﹤0.01% |
2,869
-1,405,632
| -100% | -$45.1M |
|
5348
PUT
Leggett & Platt
LEG
$1.34B
| $83K | ﹤0.01% |
8,700
-8,700
| -50% | -$104K |
|
5349
Onto Innovation
ONTO
$12.9B
| $83K | ﹤0.01% |
+503
| New | +$91.9K |
|
5350
One Stop Systems
OSS
$303M
| $83K | ﹤0.01% |
25,044
+21,705
| +650% | +$55.1K |
|
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.