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 | |
|---|---|---|---|---|---|---|
|
GMS
6501
PUT
DELISTED
GMS Inc
GMS
| $25K | ﹤0.01% |
300
| – | – |
|
|
GPMT
6502
Granite Point Mortgage Trust
GPMT
$69M
| $25K | ﹤0.01% |
9,318
-9,422
| -50% | -$29.7K |
|
|
MCHB
6503
Mechanics Bancorp
MCHB
$3.72B
| $25K | ﹤0.01% |
2,202
+1,919
| +678% | +$23.8K |
|
6504
PUT
HNI Corp
HNI
$3.24B
| $25K | ﹤0.01% |
+500
| New | +$26.8K |
|
6505
iShares Global Tech ETF
IXN
$8.32B
| $25K | ﹤0.01% |
+303
| New | +$25.5K |
|
6506
IZEA Worldwide
IZEA
$60.6M
| $25K | ﹤0.01% |
9,442
+3,712
| +65% | +$9.96K |
|
6507
Korea Electric Power
KEP
$15.3B
| $25K | ﹤0.01% |
+3,681
| New | +$28.8K |
|
6508
Mid-America Apartment Communities
MAA
$15.4B
| $25K | ﹤0.01% |
166
-3,134
| -95% | -$489K |
|
|
PKST
6509
PUT
DELISTED
Peakstone Realty Trust
PKST
| $25K | ﹤0.01% |
2,300
-1,300
| -36% | -$16.9K |
|
6510
PMV Pharmaceuticals
PMVP
$59.2M
| $25K | ﹤0.01% |
16,935
+5,224
| +45% | +$8.27K |
|
6511
PUT
Spok Holdings
SPOK
$228M
| $25K | ﹤0.01% |
1,600
-1,200
| -43% | -$19K |
|
6512
CALL
Alto Neuroscience
ANRO
$1.05B
| $25K | ﹤0.01% |
+6,000
| New | +$37.4K |
|
|
QQQT
6513
Defiance Nasdaq 100 Income Target ETF
QQQT
$44.5M
| $25K | ﹤0.01% |
+1,347
| New | +$26K |
|
|
LAR
6514
PUT
Lithium Argentina AG
LAR
$985M
| $25K | ﹤0.01% |
106,000
+72,500
| +216% | +$236K |
|
6515
ALX Oncology
ALXO
$261M
| $24K | ﹤0.01% |
14,567
-2,579
| -15% | -$3.96K |
|
6516
JPMorgan BetaBuilders Japan ETF
BBJP
$17.5B
| $24K | ﹤0.01% |
+452
| New | +$25.8K |
|
6517
C4 Therapeutics
CCCC
$385M
| $24K | ﹤0.01% |
6,871
-73,628
| -91% | -$366K |
|
6518
Clarus
CLAR
$123M
| $24K | ﹤0.01% |
5,443
+4,192
| +335% | +$18.8K |
|
6519
CALL
CytomX Therapeutics
CTMX
$675M
| $24K | ﹤0.01% |
23,500
+18,000
| +327% | +$19.4K |
|
|
CTO
6520
CTO Realty Growth
CTO
$824M
| $24K | ﹤0.01% |
1,248
-1,469
| -54% | -$28.9K |
|
6521
CALL
Douglas Emmett
DEI
$1.98B
| $24K | ﹤0.01% |
1,300
-800
| -38% | -$14.9K |
|
6522
PUT
Eastern Bankshares
EBC
$5.26B
| $24K | ﹤0.01% |
1,400
-200
| -13% | -$3.49K |
|
|
EHAB
6523
DELISTED
Enhabit
EHAB
| $24K | ﹤0.01% |
3,086
-2,101
| -41% | -$16K |
|
6524
PUT
Evolus
EOLS
$385M
| $24K | ﹤0.01% |
2,200
+600
| +38% | +$8.44K |
|
6525
PUT
Fossil Group
FOSL
$293M
| $24K | ﹤0.01% |
14,400
-72,400
| -83% | -$106K |
|
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.