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 | |
|---|---|---|---|---|---|---|
3976
Comtech Telecommunications
CMTL
$51.5M
| $327K | ﹤0.01% |
81,635
+56,667
| +227% | +$202K |
|
3977
PUT
Hallador Energy
HNRG
$689M
| $327K | ﹤0.01% |
28,600
-215,000
| -88% | -$2.4M |
|
3978
ProShares Ultra Financials
UYG
$847M
| $327K | ﹤0.01% |
+3,827
| New | +$330K |
|
|
VTYX
3979
DELISTED
Ventyx Biosciences
VTYX
| $327K | ﹤0.01% |
+149,554
| New | +$339K |
|
3980
T-Rex 2X Long NVIDIA Daily Target ETF
NVDX
$421M
| $326K | ﹤0.01% |
23,311
+18,666
| +402% | +$325K |
|
3981
CALL
Perion Network
PERI
$378M
| $326K | ﹤0.01% |
38,600
-14,100
| -27% | -$118K |
|
3982
PUT
Schrodinger
SDGR
$1.14B
| $326K | ﹤0.01% |
16,900
-29,600
| -64% | -$575K |
|
|
WIMI
3983
WiMi Hologram Cloud
WIMI
$21M
| $326K | ﹤0.01% |
+17,634
| New | +$169K |
|
3984
PUT
Buckle
BKE
$2.35B
| $325K | ﹤0.01% |
6,400
-4,500
| -41% | -$213K |
|
3985
CALL
East-West Bancorp
EWBC
$18B
| $325K | ﹤0.01% |
3,400
+500
| +17% | +$49.1K |
|
|
WW
3986
CALL
DELISTED
WW International
WW
| $325K | ﹤0.01% |
257,500
+97,500
| +61% | +$117K |
|
3987
PUT
Sinclair Inc
SBGI
$1.02B
| $324K | ﹤0.01% |
20,100
-10,100
| -33% | -$170K |
|
|
DESP
3988
PUT
DELISTED
Despegar.com
DESP
| $323K | ﹤0.01% |
16,800
+8,000
| +91% | +$126K |
|
|
HPP
3989
PUT
Hudson Pacific Properties
HPP
$765M
| $323K | ﹤0.01% |
15,271
-872
| -5% | -$23.8K |
|
3990
CALL
Geron
GERN
$930M
| $322K | ﹤0.01% |
91,000
-202,400
| -69% | -$808K |
|
3991
CALL
Kaspi.kz JSC
KSPI
$16.5B
| $322K | ﹤0.01% |
3,400
+2,500
| +278% | +$267K |
|
3992
Sonos
SONO
$2B
| $322K | ﹤0.01% |
21,463
+451
| +2% | +$6.07K |
|
3993
CALL
Teekay Tankers
TNK
$2.66B
| $322K | ﹤0.01% |
8,100
+4,800
| +145% | +$222K |
|
3994
PUT
Axcelis
ACLS
$3.69B
| $321K | ﹤0.01% |
4,600
-3,600
| -44% | -$299K |
|
|
HELP
3995
CALL
Cybin Inc
HELP
$471M
| $321K | ﹤0.01% |
+36,500
| New | +$371K |
|
|
SAGE
3996
CALL
DELISTED
Sage Therapeutics
SAGE
| $321K | ﹤0.01% |
59,200
-101,200
| -63% | -$619K |
|
3997
PUT
Vera Therapeutics
VERA
$2.39B
| $321K | ﹤0.01% |
7,600
+400
| +6% | +$17.7K |
|
3998
CALL
Edgewise Therapeutics
EWTX
$4.34B
| $320K | ﹤0.01% |
12,000
-56,700
| -83% | -$1.81M |
|
3999
CALL
FTAI Infrastructure
FIP
$482M
| $320K | ﹤0.01% |
44,200
-500
| -1% | -$4.29K |
|
4000
CALL
Jazz Pharmaceuticals
JAZZ
$16.1B
| $320K | ﹤0.01% |
2,600
-4,400
| -63% | -$519K |
|
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.