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 | |
|---|---|---|---|---|---|---|
1476
PUT
Fastenal
FAST
$54B
| $5.02M | ﹤0.01% |
139,600
-62,000
| -31% | -$2.42M |
|
1477
Bloom Energy
BE
$52.6B
| $5.02M | ﹤0.01% |
+225,901
| New | +$3.96M |
|
1478
CALL
Invesco
IVZ
$13.3B
| $5.01M | ﹤0.01% |
286,400
+46,900
| +20% | +$835K |
|
1479
CALL
Range Resources
RRC
$9.11B
| $5M | ﹤0.01% |
138,900
+13,100
| +10% | +$433K |
|
1480
PUT
Vornado Realty Trust
VNO
$7.47B
| $4.99M | ﹤0.01% |
118,700
-66,400
| -36% | -$2.81M |
|
1481
CALL
Grab
GRAB
$13.5B
| $4.99M | ﹤0.01% |
1,056,700
+737,600
| +231% | +$3.36M |
|
1482
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $4.99M | ﹤0.01% |
126,700
+15,900
| +14% | +$751K |
|
1483
PUT
Blackstone Mortgage Trust
BXMT
$2.82B
| $4.96M | ﹤0.01% |
285,000
+41,100
| +17% | +$760K |
|
1484
Lamb Weston
LW
$6.85B
| $4.95M | ﹤0.01% |
74,129
-236,993
| -76% | -$17.7M |
|
1485
PUT
Manchester United
MANU
$3.91B
| $4.94M | ﹤0.01% |
285,000
-30,500
| -10% | -$514K |
|
1486
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $4.94M | ﹤0.01% |
62,843
+13,320
| +27% | +$1.08M |
|
1487
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $4.94M | ﹤0.01% |
667,100
+381,600
| +134% | +$3.54M |
|
1488
PUT
Illumina
ILMN
$29.4B
| $4.93M | ﹤0.01% |
60,400
+20,500
| +51% | +$2.92M |
|
1489
CALL
FIGS
FIGS
$1.59B
| $4.93M | ﹤0.01% |
796,900
+451,500
| +131% | +$2.63M |
|
1490
ARK Innovation ETF
ARKK
$5.89B
| $4.93M | ﹤0.01% |
86,790
+14,717
| +20% | +$788K |
|
1491
XPO
XPO
$25B
| $4.91M | ﹤0.01% |
37,406
+3,094
| +9% | +$418K |
|
1492
PUT
Exelixis
EXEL
$13.9B
| $4.89M | ﹤0.01% |
147,000
-18,200
| -11% | -$590K |
|
|
EXAS
1493
PUT
DELISTED
Exact Sciences
EXAS
| $4.89M | ﹤0.01% |
87,100
-134,600
| -61% | -$8.38M |
|
1494
Macy's
M
$6.15B
| $4.89M | ﹤0.01% |
289,095
-17,865
| -6% | -$285K |
|
1495
CALL
Weibo
WB
$1.9B
| $4.89M | ﹤0.01% |
512,400
-136,900
| -21% | -$1.31M |
|
|
SPR
1496
PUT
DELISTED
Spirit AeroSystems
SPR
| $4.88M | ﹤0.01% |
143,300
-33,500
| -19% | -$1.08M |
|
1497
PUT
Texas Pacific Land
TPL
$28.9B
| $4.87M | ﹤0.01% |
13,200
+12,900
| +4,300% | +$5.27M |
|
|
BLUE
1498
CALL
DELISTED
bluebird bio
BLUE
| $4.86M | ﹤0.01% |
582,700
+570,165
| +4,549% | +$4.98M |
|
|
ABK
1499
CALL
DELISTED
Ambac Financial Group
ABK
| $4.85M | ﹤0.01% |
383,400
+69,100
| +22% | +$874K |
|
1500
CALL
Novavax
NVAX
$1.23B
| $4.83M | ﹤0.01% |
600,300
+96,900
| +19% | +$934K |
|
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.