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 | |
|---|---|---|---|---|---|---|
|
TYNS
476
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $29.3M | 0.02% |
211,500
+43,800
| +26% | +$6.08M |
|
477
CALL
Dick's Sporting Goods
DKS
$18.8B
| $29.1M | 0.02% |
127,300
-62,600
| -33% | -$13.1M |
|
478
PUT
Workday
WDAY
$32.7B
| $29.1M | 0.02% |
112,900
-61,600
| -35% | -$15.7M |
|
479
PUT
Take-Two Interactive
TTWO
$43.4B
| $28.8M | 0.02% |
156,200
-69,000
| -31% | -$12M |
|
480
PUT
TJX Companies
TJX
$172B
| $28.7M | 0.02% |
237,200
-15,700
| -6% | -$1.87M |
|
481
PUT
Altria Group
MO
$121B
| $28.6M | 0.02% |
547,600
-61,800
| -10% | -$3.29M |
|
482
CALL
Fortinet
FTNT
$114B
| $28.6M | 0.02% |
302,800
-147,000
| -33% | -$13.1M |
|
483
PUT
Twilio
TWLO
$27.8B
| $28.3M | 0.02% |
262,200
-71,200
| -21% | -$6.51M |
|
484
CALL
KKR & Co
KKR
$85.8B
| $28.3M | 0.02% |
191,500
-19,900
| -9% | -$2.92M |
|
485
CALL
Roku
ROKU
$21.2B
| $28.3M | 0.02% |
380,800
-85,700
| -18% | -$6.49M |
|
486
CALL
Elevance Health
ELV
$84.4B
| $28.2M | 0.02% |
76,500
+26,000
| +51% | +$10.9M |
|
|
BNY
487
CALL
Bank of New York Mellon
BNY
$110B
| $28.2M | 0.02% |
366,800
+123,300
| +51% | +$9.53M |
|
|
B
488
Barrick Mining
B
$62.8B
| $28.2M | 0.02% |
1,817,987
+511,272
| +39% | +$9.3M |
|
489
CALL
Match Group
MTCH
$8.87B
| $28.1M | 0.02% |
860,200
+279,500
| +48% | +$9.58M |
|
490
PUT
Linde
LIN
$235B
| $28.1M | 0.02% |
67,200
-65,500
| -49% | -$29.8M |
|
491
PUT
Expedia Group
EXPE
$31.3B
| $27.9M | 0.02% |
149,900
+12,200
| +9% | +$2.1M |
|
492
CALL
Gilead Sciences
GILD
$162B
| $27.4M | 0.02% |
297,000
-111,100
| -27% | -$10M |
|
493
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$22B
| $27.3M | 0.02% |
1,000,338
+235,607
| +31% | +$7.5M |
|
494
State Street SPDR S&P Biotech ETF
XBI
$10.2B
| $27.3M | 0.02% |
+302,694
| New | +$29.3M |
|
495
PUT
Digital Realty Trust
DLR
$66B
| $27.3M | 0.02% |
153,700
-100
| -0.1% | -$17.7K |
|
496
CALL
Wynn Resorts
WYNN
$9.79B
| $27.1M | 0.02% |
314,400
-346,000
| -52% | -$32.7M |
|
497
PUT
Akamai
AKAM
$18.1B
| $26.8M | 0.02% |
280,700
+23,100
| +9% | +$2.27M |
|
498
PUT
Bilibili
BILI
$7.4B
| $26.8M | 0.02% |
1,482,100
+161,100
| +12% | +$3.37M |
|
499
PUT
ON Semiconductor
ON
$35.9B
| $26.8M | 0.02% |
425,200
+17,000
| +4% | +$1.17M |
|
500
CALL
Etsy
ETSY
$7.64B
| $26.7M | 0.02% |
505,600
+84,200
| +20% | +$4.49M |
|
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.