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 | |
|---|---|---|---|---|---|---|
|
TWO
5401
CALL
Two Harbors Investment
TWO
$1.27B
| $79K | ﹤0.01% |
6,700
-2,900
| -30% | -$35.1K |
|
5402
Vanda Pharmaceuticals
VNDA
$307M
| $79K | ﹤0.01% |
16,659
+6,465
| +63% | +$31K |
|
5403
CALL
VOC Energy
VOC
$50.7M
| $79K | ﹤0.01% |
16,700
+15,000
| +882% | +$75.1K |
|
|
NAGE
5404
PUT
Niagen Bioscience
NAGE
$271M
| $79K | ﹤0.01% |
15,000
| – | – |
|
5405
ARKO Corp
ARKO
$896M
| $78K | ﹤0.01% |
11,940
-94,798
| -89% | -$653K |
|
5406
PUT
Atmus Filtration Technologies
ATMU
$4.22B
| $78K | ﹤0.01% |
2,000
-7,100
| -78% | -$288K |
|
|
LSEA
5407
CALL
DELISTED
Landsea Homes
LSEA
| $78K | ﹤0.01% |
9,300
-22,700
| -71% | -$245K |
|
5408
PUT
National Fuel Gas
NFG
$7.82B
| $78K | ﹤0.01% |
1,300
-1,600
| -55% | -$98.1K |
|
5409
PUT
Navigator Holdings
NVGS
$1.38B
| $78K | ﹤0.01% |
5,100
-3,200
| -39% | -$50.4K |
|
5410
CALL
Outset Medical
OM
$84.7M
| $78K | ﹤0.01% |
4,727
+4,447
| +1,588% | +$55.5K |
|
|
OTLY
5411
Oatly Group
OTLY
$465M
| $78K | ﹤0.01% |
5,943
-985
| -14% | -$14.5K |
|
5412
CALL
Plexus
PLXS
$6.72B
| $78K | ﹤0.01% |
+500
| New | +$76.4K |
|
5413
ProShares Ultra QQQ
QLD
$12.7B
| $78K | ﹤0.01% |
1,456
-31,538
| -96% | -$1.69M |
|
5414
Vanguard Tax-Exempt Bond Index Fund
VTEB
$45.1B
| $78K | ﹤0.01% |
+1,563
| New | +$79K |
|
5415
PUT
Ibotta
IBTA
$559M
| $78K | ﹤0.01% |
+1,200
| New | +$83.3K |
|
|
AL
5416
PUT
DELISTED
Air Lease Corp
AL
| $77K | ﹤0.01% |
1,600
-6,000
| -79% | -$283K |
|
5417
PUT
State Street SPDR MSCI Emerging Markets Fossil Fuel Reserves Free ETF
EEMX
$172M
| $77K | ﹤0.01% |
+2,400
| New | +$81.9K |
|
5418
CALL
Eton Pharmaceutcials
ETON
$1.27B
| $77K | ﹤0.01% |
5,800
-3,700
| -39% | -$37.5K |
|
5419
PUT
GoodRx Holdings
GDRX
$1.04B
| $77K | ﹤0.01% |
16,700
-17,200
| -51% | -$94.5K |
|
|
GOOD
5420
CALL
Gladstone Commercial Corp
GOOD
$605M
| $77K | ﹤0.01% |
4,800
-100
| -2% | -$1.66K |
|
5421
CALL
HighPeak Energy
HPK
$903M
| $77K | ﹤0.01% |
5,300
-17,800
| -77% | -$255K |
|
5422
Jack Henry & Associates
JKHY
$10.9B
| $77K | ﹤0.01% |
442
+345
| +356% | +$61.7K |
|
5423
Matsons
MATX
$6.13B
| $77K | ﹤0.01% |
575
+48
| +9% | +$6.99K |
|
5424
CALL
NB Bancorp
NBBK
$1.01B
| $77K | ﹤0.01% |
4,300
+3,200
| +291% | +$61.5K |
|
|
NGD
5425
DELISTED
New Gold Inc
NGD
| $77K | ﹤0.01% |
31,433
-52,034
| -62% | -$144K |
|
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.