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 | |
|---|---|---|---|---|---|---|
3751
HealthEquity
HQY
$8.47B
| $409K | ﹤0.01% |
4,273
+1,137
| +36% | +$106K |
|
3752
PUT
nCino
NCNO
$2.05B
| $409K | ﹤0.01% |
12,200
+400
| +3% | +$14.9K |
|
3753
PUT
TPG
TPG
$6.99B
| $408K | ﹤0.01% |
6,500
-1,700
| -21% | -$112K |
|
3754
CALL
AXIS Capital
AXS
$8.77B
| $407K | ﹤0.01% |
4,600
-300
| -6% | -$25.7K |
|
3755
PUT
SBA Communications
SBAC
$18.9B
| $407K | ﹤0.01% |
2,000
-5,300
| -73% | -$1.19M |
|
3756
PUT
Tennant Co
TNC
$1.5B
| $407K | ﹤0.01% |
5,000
| – | – |
|
3757
Cemex
CX
$17.3B
| $406K | ﹤0.01% |
+72,032
| New | +$409K |
|
3758
CALL
Axcelis
ACLS
$3.58B
| $405K | ﹤0.01% |
5,800
-22,000
| -79% | -$1.83M |
|
3759
CALL
Carlisle Companies
CSL
$14B
| $405K | ﹤0.01% |
1,100
+700
| +175% | +$305K |
|
3760
CALL
Manchester United
MANU
$4.01B
| $405K | ﹤0.01% |
23,400
-26,000
| -53% | -$439K |
|
3761
SL Green Realty
SLG
$3.76B
| $405K | ﹤0.01% |
+5,974
| New | +$442K |
|
3762
B&G Foods
BGS
$299M
| $404K | ﹤0.01% |
58,757
+20,850
| +55% | +$157K |
|
|
BLD
3763
CALL
DELISTED
TopBuild
BLD
| $404K | ﹤0.01% |
1,300
+500
| +63% | +$183K |
|
3764
PUT
Navient
NAVI
$823M
| $404K | ﹤0.01% |
30,400
-25,700
| -46% | -$384K |
|
3765
CALL
National Grid
NGG
$81.7B
| $404K | ﹤0.01% |
7,099
+2,536
| +56% | +$153K |
|
3766
CALL
Douglas Elliman
DOUG
$160M
| $402K | ﹤0.01% |
241,000
+239,600
| +17,114% | +$461K |
|
3767
FS KKR Capital
FSK
$3.05B
| $402K | ﹤0.01% |
18,553
+4,411
| +31% | +$92.6K |
|
|
LX
3768
CALL
LexinFintech Holdings
LX
$237M
| $402K | ﹤0.01% |
69,400
+51,000
| +277% | +$214K |
|
3769
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.33B
| $402K | ﹤0.01% |
10,077
-120,262
| -92% | -$5.72M |
|
3770
TransAlta
TAC
$4.02B
| $401K | ﹤0.01% |
28,360
-35,239
| -55% | -$402K |
|
3771
PUT
Telus
TU
$16.7B
| $401K | ﹤0.01% |
29,600
+13,800
| +87% | +$213K |
|
|
BTC
3772
Grayscale Bitcoin Mini Trust ETF
BTC
$3.37B
| $400K | ﹤0.01% |
+9,564
| New | +$352K |
|
3773
CALL
Ascendis Pharma A/S
ASND
$16.3B
| $399K | ﹤0.01% |
2,900
-1,000
| -26% | -$131K |
|
3774
PUT
Celldex Therapeutics
CLDX
$2.79B
| $399K | ﹤0.01% |
15,800
-63,600
| -80% | -$1.73M |
|
3775
CALL
Quantum-Si Incorporated
QSI
$166M
| $399K | ﹤0.01% |
147,900
+87,700
| +146% | +$103K |
|
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.