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 | |
|---|---|---|---|---|---|---|
1426
CALL
Monolithic Power Systems
MPWR
$65.5B
| $5.44M | ﹤0.01% |
9,200
+3,800
| +70% | +$2.75M |
|
1427
PUT
Dynatrace
DT
$12.1B
| $5.43M | ﹤0.01% |
99,900
-76,800
| -43% | -$4.19M |
|
1428
PUT
Zoetis
ZTS
$31.6B
| $5.42M | ﹤0.01% |
33,300
+3,900
| +13% | +$697K |
|
1429
TG Therapeutics
TGTX
$8.58B
| $5.42M | ﹤0.01% |
180,098
+148,339
| +467% | +$4.26M |
|
1430
PUT
PACCAR
PCAR
$69.6B
| $5.42M | ﹤0.01% |
52,100
+28,200
| +118% | +$3.09M |
|
1431
NIO
NIO
$11.3B
| $5.41M | ﹤0.01% |
1,241,947
+152,975
| +14% | +$778K |
|
1432
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $5.39M | ﹤0.01% |
55,300
+20,700
| +60% | +$2.27M |
|
1433
CALL
Shift4
FOUR
$3.84B
| $5.39M | ﹤0.01% |
51,900
-5,300
| -9% | -$526K |
|
1434
CALL
Vital Farms
VITL
$558M
| $5.38M | ﹤0.01% |
142,800
+8,500
| +6% | +$302K |
|
1435
PUT
Cirrus Logic
CRUS
$6.74B
| $5.37M | ﹤0.01% |
53,900
+36,700
| +213% | +$4.03M |
|
1436
CALL
2x Long VIX Futures ETF
UVIX
$286M
| $5.33M | ﹤0.01% |
2,829
+654
| +30% | +$557K |
|
1437
CALL
F5
FFIV
$22.1B
| $5.33M | ﹤0.01% |
21,200
-13,300
| -39% | -$3.18M |
|
1438
PUT
Alpha Metallurgical Resources
AMR
$1.82B
| $5.32M | ﹤0.01% |
26,600
-1,800
| -6% | -$403K |
|
|
PPL
1439
PUT
PPL Corp
PPL
$27.3B
| $5.32M | ﹤0.01% |
163,800
+10,500
| +7% | +$346K |
|
1440
iShares MSCI Japan ETF
EWJ
$21.7B
| $5.3M | ﹤0.01% |
79,041
+16,551
| +26% | +$1.14M |
|
|
VTLE
1441
CALL
DELISTED
Vital Energy
VTLE
| $5.29M | ﹤0.01% |
171,100
+39,900
| +30% | +$1.18M |
|
1442
Trump Media & Technology Group
DJT
$2.37B
| $5.29M | ﹤0.01% |
155,033
+1,715
| +1% | +$54.5K |
|
1443
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $5.27M | ﹤0.01% |
43,900
+7,300
| +20% | +$472K |
|
1444
CALL
Rubrik
RBRK
$15.1B
| $5.26M | ﹤0.01% |
80,500
+52,300
| +185% | +$2.58M |
|
1445
CALL
Zions Bancorporation
ZION
$10.1B
| $5.25M | ﹤0.01% |
96,700
-123,000
| -56% | -$6.74M |
|
1446
CALL
Nasdaq
NDAQ
$52.1B
| $5.24M | ﹤0.01% |
67,800
+6,500
| +11% | +$503K |
|
1447
CALL
PG&E
PCG
$47.8B
| $5.23M | ﹤0.01% |
259,200
-130,000
| -33% | -$2.64M |
|
1448
CALL
Pentair
PNR
$10.2B
| $5.22M | ﹤0.01% |
51,900
+21,900
| +73% | +$2.25M |
|
1449
CALL
Uranium Energy
UEC
$4.71B
| $5.22M | ﹤0.01% |
779,700
+303,500
| +64% | +$2.32M |
|
1450
PUT
First Majestic Silver
AG
$8.05B
| $5.21M | ﹤0.01% |
950,000
-178,900
| -16% | -$1.16M |
|
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.