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 | |
|---|---|---|---|---|---|---|
|
PRO
6126
CALL
DELISTED
PROS Holdings
PRO
| $39K | ﹤0.01% |
+1,800
| New | +$38.7K |
|
6127
PUT
Privia Health
PRVA
$2.98B
| $39K | ﹤0.01% |
2,000
| – | – |
|
6128
TD Synnex
SNX
$20.4B
| $39K | ﹤0.01% |
338
-7,789
| -96% | -$933K |
|
6129
PUT
Stevanato
STVN
$5.42B
| $39K | ﹤0.01% |
1,800
+1,100
| +157% | +$22K |
|
6130
CALL
Taysha Gene Therapies
TSHA
$1.68B
| $39K | ﹤0.01% |
22,800
+22,300
| +4,460% | +$46.3K |
|
6131
GraniteShares 2x Long TSLA Daily ETF
TSLR
$58.9M
| $39K | ﹤0.01% |
911
+813
| +830% | +$25K |
|
|
TWO
6132
PUT
Two Harbors Investment
TWO
$1.27B
| $39K | ﹤0.01% |
3,300
-39,200
| -92% | -$474K |
|
6133
CALL
Zai Lab
ZLAB
$2.06B
| $39K | ﹤0.01% |
1,500
-100
| -6% | -$2.78K |
|
|
TSSI
6134
TSS Inc
TSSI
$278M
| $39K | ﹤0.01% |
+3,328
| New | +$32.3K |
|
|
CTLT
6135
CALL
DELISTED
CATALENT, INC.
CTLT
| $39K | ﹤0.01% |
13,500
-1,300
| -9% | -$78.5K |
|
|
EMKR
6136
DELISTED
Emcore Corp
EMKR
| $39K | ﹤0.01% |
+13,055
| New | +$34.7K |
|
|
AMRN
6137
CALL
Amarin Corp
AMRN
$299M
| $38K | ﹤0.01% |
3,945
-360
| -8% | -$3.85K |
|
6138
CALL
Beam Global
BEEM
$23.3M
| $38K | ﹤0.01% |
12,000
-6,000
| -33% | -$24.6K |
|
|
CLPR
6139
PUT
Clipper Realty
CLPR
$45.2M
| $38K | ﹤0.01% |
+8,300
| New | +$46.7K |
|
6140
PUT
Daktronics
DAKT
$955M
| $38K | ﹤0.01% |
2,300
-2,900
| -56% | -$43.7K |
|
6141
CALL
Energy Recovery
ERII
$446M
| $38K | ﹤0.01% |
2,600
+2,100
| +420% | +$35.9K |
|
6142
National Beverage
FIZZ
$2.96B
| $38K | ﹤0.01% |
901
-1,794
| -67% | -$83.8K |
|
|
GB
6143
DELISTED
Global Blue Group Holding
GB
| $38K | ﹤0.01% |
+5,517
| New | +$31.7K |
|
6144
JELD-WEN Holding
JELD
$122M
| $38K | ﹤0.01% |
4,751
+2,539
| +115% | +$30.6K |
|
6145
CALL
Coca-Cola Femsa
KOF
$22.7B
| $38K | ﹤0.01% |
500
-18,900
| -97% | -$1.56M |
|
6146
Kornit Digital
KRNT
$705M
| $38K | ﹤0.01% |
1,243
-1,362
| -52% | -$39.1K |
|
6147
CALL
Marcus Corp
MCS
$897M
| $38K | ﹤0.01% |
+1,800
| New | +$35.7K |
|
6148
PUT
Marcus & Millichap
MMI
$1.16B
| $38K | ﹤0.01% |
+1,000
| New | +$39.2K |
|
6149
CALL
Global X MSCI Norway ETF
NORW
$88M
| $38K | ﹤0.01% |
1,500
-3,400
| -69% | -$85.2K |
|
6150
CALL
Insperity
NSP
$1.93B
| $38K | ﹤0.01% |
500
+200
| +67% | +$16.2K |
|
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.