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 | |
|---|---|---|---|---|---|---|
2426
CALL
LPL Financial
LPLA
$26.3B
| $1.53M | ﹤0.01% |
4,700
-6,200
| -57% | -$1.83M |
|
2427
PUT
NextDecade
NEXT
$1.85B
| $1.53M | ﹤0.01% |
199,000
+134,900
| +210% | +$864K |
|
|
NGD
2428
CALL
DELISTED
New Gold Inc
NGD
| $1.53M | ﹤0.01% |
618,400
+550,300
| +808% | +$1.52M |
|
2429
PUT
Atour Lifestyle Holdings
ATAT
$4.35B
| $1.53M | ﹤0.01% |
57,000
+55,300
| +3,253% | +$1.49M |
|
2430
CALL
Asbury Automotive
ABG
$4.19B
| $1.53M | ﹤0.01% |
6,300
+1,500
| +31% | +$367K |
|
2431
PUT
AerCap
AER
$23.9B
| $1.53M | ﹤0.01% |
16,000
-131,500
| -89% | -$12.6M |
|
2432
Kroger
KR
$34.8B
| $1.53M | ﹤0.01% |
25,044
-81,580
| -77% | -$4.79M |
|
2433
BWX Technologies
BWXT
$16B
| $1.53M | ﹤0.01% |
13,730
-13,187
| -49% | -$1.61M |
|
2434
PUT
Freedom Holding
FRHC
$9.61B
| $1.53M | ﹤0.01% |
11,700
+1,000
| +9% | +$115K |
|
2435
Burlington
BURL
$22B
| $1.53M | ﹤0.01% |
5,362
+244
| +5% | +$65.9K |
|
|
SRG
2436
CALL
Seritage Growth Properties
SRG
$130M
| $1.53M | ﹤0.01% |
370,900
-14,300
| -4% | -$61.6K |
|
2437
PUT
Winnebago Industries
WGO
$870M
| $1.53M | ﹤0.01% |
32,000
-50,000
| -61% | -$2.83M |
|
2438
Methanex
MEOH
$4.32B
| $1.53M | ﹤0.01% |
30,567
+27,720
| +974% | +$1.22M |
|
|
CAN
2439
CALL
Canaan Creative
CAN
$176M
| $1.52M | ﹤0.01% |
743,900
+473,500
| +175% | +$800K |
|
2440
PUT
Capricor Therapeutics
CAPR
$1.14B
| $1.52M | ﹤0.01% |
110,400
+52,700
| +91% | +$923K |
|
2441
CALL
Century Aluminum
CENX
$4.57B
| $1.52M | ﹤0.01% |
83,500
+6,900
| +9% | +$136K |
|
2442
BHP
BHP
$213B
| $1.52M | ﹤0.01% |
31,137
-20,366
| -40% | -$1.11M |
|
2443
Exelixis
EXEL
$13.9B
| $1.52M | ﹤0.01% |
+45,618
| New | +$1.48M |
|
|
KOCG
2444
PUT
DELISTED
FIS Knights of Columbus Global Belief ETF
KOCG
| $1.52M | ﹤0.01% |
29,900
+20,300
| +211% | +$579K |
|
|
2445
CALL
NextDecade
NEXT
$1.85B
| $1.52M | ﹤0.01% |
197,000
-2,000
| -1% | -$12.8K |
|
2446
PUT
PBF Energy
PBF
$7.29B
| $1.52M | ﹤0.01% |
57,100
-6,500
| -10% | -$198K |
|
|
IPG
2447
DELISTED
Interpublic Group of Companies
IPG
| $1.51M | ﹤0.01% |
+54,094
| New | +$1.62M |
|
2448
PUT
Nkarta
NKTX
$162M
| $1.51M | ﹤0.01% |
608,100
+605,300
| +21,618% | +$1.87M |
|
2449
CALL
GeneDx Holdings
WGS
$1.75B
| $1.51M | ﹤0.01% |
19,700
+15,100
| +328% | +$1.05M |
|
2450
CALL
Freshworks
FRSH
$2.84B
| $1.51M | ﹤0.01% |
93,600
-10,900
| -10% | -$155K |
|
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.