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 | |
|---|---|---|---|---|---|---|
|
AMPS
5801
DELISTED
Altus Power
AMPS
| $54K | ﹤0.01% |
13,410
+296
| +2% | +$1.08K |
|
|
LICY
5802
CALL
DELISTED
Li-Cycle Holdings Corp.
LICY
| $54K | ﹤0.01% |
30,600
+22,000
| +256% | +$47.5K |
|
5803
CALL
Sphere 3D
ANY
$18.5M
| $53K | ﹤0.01% |
12,060
-1,780
| -13% | -$20.7K |
|
5804
Algoma Steel
ASTL
$406M
| $53K | ﹤0.01% |
5,426
-4,902
| -47% | -$50.6K |
|
5805
Caleres
CAL
$431M
| $53K | ﹤0.01% |
2,311
-9,652
| -81% | -$283K |
|
5806
PUT
Cognyte Software
CGNT
$659M
| $53K | ﹤0.01% |
6,200
-1,000
| -14% | -$7.55K |
|
5807
CALL
Element Solutions
ESI
$8.95B
| $53K | ﹤0.01% |
2,100
-9,500
| -82% | -$257K |
|
5808
Greystone Housing Impact Investors LP
GHI
$136M
| $53K | ﹤0.01% |
5,233
+5,163
| +7,376% | +$62.1K |
|
5809
CALL
Garrett Motion
GTX
$5.81B
| $53K | ﹤0.01% |
5,900
-6,700
| -53% | -$55.6K |
|
5810
PUT
LGI Homes
LGIH
$1.27B
| $53K | ﹤0.01% |
600
-4,700
| -89% | -$493K |
|
5811
CALL
Luxfer Holdings
LXFR
$456M
| $53K | ﹤0.01% |
+4,100
| New | +$56.1K |
|
5812
PUT
Magnolia Oil & Gas
MGY
$6.09B
| $53K | ﹤0.01% |
2,300
-17,500
| -88% | -$455K |
|
5813
PUT
O-I Glass
OI
$1.1B
| $53K | ﹤0.01% |
4,900
+1,600
| +48% | +$19.4K |
|
5814
CALL
Omnicell
OMCL
$1.61B
| $53K | ﹤0.01% |
1,200
+1,000
| +500% | +$44.9K |
|
5815
CALL
Patria Investments
PAX
$1.75B
| $53K | ﹤0.01% |
4,600
+1,400
| +44% | +$16.5K |
|
5816
State Street SPDR Portfolio Long Term Treasury ETF
SPTL
$10.4B
| $53K | ﹤0.01% |
2,059
-1,125
| -35% | -$30.8K |
|
5817
Tactile Systems Technology
TCMD
$635M
| $53K | ﹤0.01% |
+3,139
| New | +$50.4K |
|
5818
PUT
Westlake Chemical Partners
WLKP
$763M
| $53K | ﹤0.01% |
2,300
-1,500
| -39% | -$34.4K |
|
5819
Invesco S&P MidCap Quality ETF
XMHQ
$5.47B
| $53K | ﹤0.01% |
+546
| New | +$56.5K |
|
|
CMBT
5820
PUT
CMB.TECH NV
CMBT
$4.69B
| $53K | ﹤0.01% |
5,400
+3,400
| +170% | +$44K |
|
|
TSSI
5821
PUT
TSS Inc
TSSI
$278M
| $53K | ﹤0.01% |
+4,500
| New | +$43.7K |
|
|
BERY
5822
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $53K | ﹤0.01% |
7,500
-19,507
| -72% | -$1.29M |
|
|
LICY
5823
PUT
DELISTED
Li-Cycle Holdings Corp.
LICY
| $53K | ﹤0.01% |
29,800
+26,600
| +831% | +$57.4K |
|
5824
Ardagh Metal Packaging
AMBP
$2.83B
| $52K | ﹤0.01% |
+17,406
| New | +$62.7K |
|
5825
PUT
Black Hills Corp
BKH
$5.42B
| $52K | ﹤0.01% |
900
-400
| -31% | -$24.3K |
|
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.