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 | |
|---|---|---|---|---|---|---|
6251
PUT
Expeditors International
EXPD
$22B
| $33K | ﹤0.01% |
300
-51,800
| -99% | -$6.18M |
|
6252
HUB Group
HUBG
$2.85B
| $33K | ﹤0.01% |
+748
| New | +$34.9K |
|
6253
Imperial Oil
IMO
$62.7B
| $33K | ﹤0.01% |
542
+321
| +145% | +$23.3K |
|
6254
iRadimed
IRMD
$1.16B
| $33K | ﹤0.01% |
+607
| New | +$31.9K |
|
6255
Kopin
KOPN
$652M
| $33K | ﹤0.01% |
24,680
-5,098
| -17% | -$4.89K |
|
6256
KraneShares Hang Seng TECH Index ETF
KTEC
$59.6M
| $33K | ﹤0.01% |
2,499
+2,396
| +2,326% | +$33.4K |
|
6257
Liquidity Services
LQDT
$1.22B
| $33K | ﹤0.01% |
+1,044
| New | +$26.5K |
|
6258
CALL
Morningstar
MORN
$7.22B
| $33K | ﹤0.01% |
100
-600
| -86% | -$205K |
|
|
6259
PUT
Morningstar
MORN
$7.22B
| $33K | ﹤0.01% |
100
| – | – |
|
|
MRUS
6260
CALL
DELISTED
Merus
MRUS
| $33K | ﹤0.01% |
800
-100
| -11% | -$4.8K |
|
6261
CALL
NCR Atleos
NATL
$3.47B
| $33K | ﹤0.01% |
1,000
-8,700
| -90% | -$264K |
|
6262
CALL
Newegg Commerce
NEGG
$279M
| $33K | ﹤0.01% |
4,255
+1,395
| +49% | +$16.8K |
|
|
TEAD
6263
CALL
Teads Holding Co
TEAD
$68.7M
| $33K | ﹤0.01% |
4,700
+3,300
| +236% | +$18K |
|
6264
CALL
Radware
RDWR
$1.1B
| $33K | ﹤0.01% |
+1,500
| New | +$34.3K |
|
6265
CALL
Sight Sciences
SGHT
$286M
| $33K | ﹤0.01% |
9,300
+1,700
| +22% | +$7.74K |
|
|
SNCY
6266
DELISTED
Sun Country Airlines
SNCY
| $33K | ﹤0.01% |
2,264
-1,537
| -40% | -$20.9K |
|
|
XNET
6267
CALL
Xunlei
XNET
$340M
| $33K | ﹤0.01% |
16,800
+11,700
| +229% | +$23.7K |
|
6268
CALL
ReWalk Robotics
LFWD
$20.3M
| $33K | ﹤0.01% |
+1,608
| New | +$42.4K |
|
6269
PUT
Corpay
CPAY
$25B
| $33K | ﹤0.01% |
100
-100
| -50% | -$35.1K |
|
6270
PUT
Ascent Industries
ACNT
$140M
| $32K | ﹤0.01% |
+2,900
| New | +$29.8K |
|
|
AHRT
6271
PUT
AH Realty Trust
AHRT
$529M
| $32K | ﹤0.01% |
3,200
-6,000
| -65% | -$65.2K |
|
6272
CALL
Ardagh Metal Packaging
AMBP
$2.83B
| $32K | ﹤0.01% |
10,900
-2,500
| -19% | -$9K |
|
6273
Artisan Partners
APAM
$2.79B
| $32K | ﹤0.01% |
+765
| New | +$34.9K |
|
6274
PUT
Digital Turbine
APPS
$975M
| $32K | ﹤0.01% |
19,500
+17,200
| +748% | +$38.3K |
|
|
BCYC
6275
CALL
Bicycle Therapeutics
BCYC
$269M
| $32K | ﹤0.01% |
2,300
-3,000
| -57% | -$64.3K |
|
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.