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 | |
|---|---|---|---|---|---|---|
1701
PUT
Natera
NTRA
$37.5B
| $3.69M | ﹤0.01% |
23,300
+20,000
| +606% | +$2.91M |
|
1702
CALL
Tilray
TLRY
$479M
| $3.69M | ﹤0.01% |
277,290
+66,860
| +32% | +$981K |
|
1703
CALL
CVR Partners
UAN
$1.3B
| $3.68M | ﹤0.01% |
48,500
+6,100
| +14% | +$442K |
|
1704
PUT
Commault Systems
CVLT
$5.89B
| $3.68M | ﹤0.01% |
24,400
+20,500
| +526% | +$3.3M |
|
|
DAY
1705
PUT
DELISTED
Dayforce
DAY
| $3.67M | ﹤0.01% |
50,600
+5,800
| +13% | +$420K |
|
1706
PUT
Baxter International
BAX
$11.6B
| $3.66M | ﹤0.01% |
125,400
+15,000
| +14% | +$505K |
|
|
FLG
1707
Flagstar Bank National Association
FLG
$5.77B
| $3.65M | ﹤0.01% |
391,686
+32,631
| +9% | +$356K |
|
1708
Etsy
ETSY
$7.65B
| $3.65M | ﹤0.01% |
68,994
+66,433
| +2,594% | +$3.54M |
|
1709
CALL
GDS Holdings
GDS
$6.34B
| $3.65M | ﹤0.01% |
153,500
+58,300
| +61% | +$1.23M |
|
1710
PUT
M&T Bank
MTB
$36.2B
| $3.65M | ﹤0.01% |
19,400
-29,000
| -60% | -$5.76M |
|
1711
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $3.65M | ﹤0.01% |
209,400
+72,700
| +53% | +$1.34M |
|
1712
CALL
HF Sinclair
DINO
$15.9B
| $3.65M | ﹤0.01% |
104,000
+79,000
| +316% | +$3.23M |
|
1713
CALL
VICI Properties
VICI
$29.4B
| $3.64M | ﹤0.01% |
124,700
-132,300
| -51% | -$4.18M |
|
1714
First Citizens BancShares
FCNCA
$24.6B
| $3.63M | ﹤0.01% |
1,720
-2,487
| -59% | -$5.21M |
|
1715
CALL
Darling Ingredients
DAR
$9.93B
| $3.63M | ﹤0.01% |
107,800
+16,300
| +18% | +$616K |
|
1716
PUT
Golar LNG
GLNG
$4.95B
| $3.63M | ﹤0.01% |
85,700
-118,500
| -58% | -$4.62M |
|
1717
PUT
Hyatt Hotels
H
$17.6B
| $3.63M | ﹤0.01% |
23,100
-15,000
| -39% | -$2.33M |
|
1718
CALL
IQVIA
IQV
$34.7B
| $3.62M | ﹤0.01% |
18,400
+8,600
| +88% | +$1.81M |
|
1719
CALL
Molson Coors Class B
TAP
$7.68B
| $3.61M | ﹤0.01% |
63,000
-95,300
| -60% | -$5.56M |
|
1720
CALL
MasTec
MTZ
$26.7B
| $3.61M | ﹤0.01% |
26,500
-39,500
| -60% | -$5.3M |
|
1721
PUT
Semtech
SMTC
$11.7B
| $3.58M | ﹤0.01% |
57,900
+31,100
| +116% | +$1.64M |
|
1722
PUT
Douglas Emmett
DEI
$2.06B
| $3.56M | ﹤0.01% |
192,000
-15,400
| -7% | -$287K |
|
1723
Solventum
SOLV
$13.5B
| $3.56M | ﹤0.01% |
53,950
+36,560
| +210% | +$2.56M |
|
1724
CALL
Trupanion
TRUP
$1.05B
| $3.54M | ﹤0.01% |
73,500
-10,000
| -12% | -$513K |
|
1725
CALL
Harley-Davidson
HOG
$2.68B
| $3.54M | ﹤0.01% |
117,500
-27,300
| -19% | -$904K |
|
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.