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 | |
|---|---|---|---|---|---|---|
5776
CALL
Gulfport Energy Corp
GPOR
$2.9B
| $55K | ﹤0.01% |
300
-900
| -75% | -$144K |
|
5777
ING
ING
$99.8B
| $55K | ﹤0.01% |
+3,521
| New | +$57.2K |
|
5778
CALL
Ingredion
INGR
$6.27B
| $55K | ﹤0.01% |
400
+100
| +33% | +$14.1K |
|
|
5779
PUT
Ingredion
INGR
$6.27B
| $55K | ﹤0.01% |
400
-700
| -64% | -$98.5K |
|
5780
CALL
Monarch Casino & Resort
MCRI
$2.2B
| $55K | ﹤0.01% |
+700
| New | +$56.5K |
|
5781
PUT
Rogers Communications
RCI
$18.3B
| $55K | ﹤0.01% |
1,800
-10,600
| -85% | -$379K |
|
5782
CALL
RadNet
RDNT
$5.02B
| $55K | ﹤0.01% |
800
-6,600
| -89% | -$487K |
|
5783
PUT
ReposiTrak
TRAK
$153M
| $55K | ﹤0.01% |
2,500
-500
| -17% | -$10.6K |
|
5784
PUT
United States Antimony
UAMY
$751M
| $55K | ﹤0.01% |
+31,300
| New | +$31.4K |
|
5785
Vertex
VERX
$2.09B
| $55K | ﹤0.01% |
1,036
+989
| +2,104% | +$48K |
|
5786
CALL
XPEL
XPEL
$1.22B
| $55K | ﹤0.01% |
1,400
-1,300
| -48% | -$55.5K |
|
|
5787
PUT
XPEL
XPEL
$1.22B
| $55K | ﹤0.01% |
1,400
-700
| -33% | -$29.9K |
|
|
FIAT
5788
YieldMax Short COIN Option Income Strategy ETF
FIAT
$36.8M
| $55K | ﹤0.01% |
593
+500
| +538% | +$62.2K |
|
|
MKFG
5789
PUT
DELISTED
Markforged Holding Corporation
MKFG
| $55K | ﹤0.01% |
17,800
+14,400
| +424% | +$60.4K |
|
|
CMRX
5790
PUT
DELISTED
Chimerix, Inc.
CMRX
| $55K | ﹤0.01% |
15,900
-1,800
| -10% | -$2.54K |
|
5791
Avantis International Small Cap Value ETF
AVDV
$19B
| $54K | ﹤0.01% |
+835
| New | +$56.2K |
|
5792
CALL
BlackLine
BL
$1.84B
| $54K | ﹤0.01% |
900
-28,200
| -97% | -$1.68M |
|
5793
PUT
CarGurus
CARG
$3.27B
| $54K | ﹤0.01% |
1,500
-14,500
| -91% | -$498K |
|
5794
FingerMotion
FNGR
$16.6M
| $54K | ﹤0.01% |
45,680
+26,164
| +134% | +$50.7K |
|
5795
PUT
Grocery Outlet
GO
$909M
| $54K | ﹤0.01% |
3,500
+1,600
| +84% | +$27.8K |
|
5796
PUT
OR Royalties Inc
OR
$5.58B
| $54K | ﹤0.01% |
3,000
-7,200
| -71% | -$140K |
|
5797
CALL
Primerica
PRI
$9.98B
| $54K | ﹤0.01% |
+200
| New | +$56.7K |
|
5798
PUT
Voyager Therapeutics
VYGR
$183M
| $54K | ﹤0.01% |
9,700
+3,500
| +56% | +$22.6K |
|
5799
PUT
Workiva
WK
$3.36B
| $54K | ﹤0.01% |
500
-2,700
| -84% | -$249K |
|
|
MKFG
5800
DELISTED
Markforged Holding Corporation
MKFG
| $54K | ﹤0.01% |
17,404
+11,933
| +218% | +$50.1K |
|
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.