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 | |
|---|---|---|---|---|---|---|
1376
CALL
The Mosaic Company
MOS
$7.09B
| $5.79M | ﹤0.01% |
235,500
-102,400
| -30% | -$2.68M |
|
1377
TSMC
TSM
$2.09T
| $5.77M | ﹤0.01% |
29,217
-86,095
| -75% | -$16.7M |
|
1378
PUT
Insulet
PODD
$11.3B
| $5.77M | ﹤0.01% |
22,100
-24,100
| -52% | -$6.07M |
|
1379
Darden Restaurants
DRI
$22.5B
| $5.77M | ﹤0.01% |
+30,892
| New | +$5.18M |
|
1380
CALL
Vornado Realty Trust
VNO
$7.47B
| $5.76M | ﹤0.01% |
137,100
+46,100
| +51% | +$1.95M |
|
1381
PUT
D-Wave Quantum
QBTS
$6B
| $5.75M | ﹤0.01% |
684,800
+578,100
| +542% | +$1.73M |
|
1382
CALL
CRISPR Therapeutics
CRSP
$4.58B
| $5.75M | ﹤0.01% |
146,000
-1,300
| -0.9% | -$61.4K |
|
1383
AST SpaceMobile
ASTS
$16.8B
| $5.74M | ﹤0.01% |
272,248
-3,244
| -1% | -$79.2K |
|
1384
CALL
CoStar Group
CSGP
$11.3B
| $5.71M | ﹤0.01% |
79,800
-121,900
| -60% | -$9.21M |
|
1385
CALL
Ventas
VTR
$48.9B
| $5.71M | ﹤0.01% |
97,000
+78,400
| +422% | +$4.93M |
|
1386
PUT
Symbotic
SYM
$5.11B
| $5.71M | ﹤0.01% |
240,800
+14,700
| +7% | +$418K |
|
1387
CALL
Zoetis
ZTS
$31.6B
| $5.7M | ﹤0.01% |
35,000
-25,500
| -42% | -$4.56M |
|
1388
CALL
Ecolab
ECL
$75.6B
| $5.69M | ﹤0.01% |
24,300
+10,200
| +72% | +$2.54M |
|
1389
PUT
Citizens Financial Group
CFG
$30.4B
| $5.69M | ﹤0.01% |
130,000
-87,600
| -40% | -$3.87M |
|
1390
PUT
Nextpower Inc
NXT
$15.2B
| $5.68M | ﹤0.01% |
155,400
-41,100
| -21% | -$1.51M |
|
1391
CALL
Asana
ASAN
$1.58B
| $5.67M | ﹤0.01% |
279,800
+118,200
| +73% | +$1.87M |
|
1392
CALL
UBS Group
UBS
$170B
| $5.66M | ﹤0.01% |
576,400
-7,100
| -1% | -$225K |
|
1393
CALL
Enbridge
ENB
$124B
| $5.66M | ﹤0.01% |
133,400
-108,200
| -45% | -$4.53M |
|
1394
ARK 21Shares Bitcoin ETF
ARKB
$2.45B
| $5.66M | ﹤0.01% |
+181,896
| New | +$5.02M |
|
1395
CALL
Exelixis
EXEL
$13.9B
| $5.63M | ﹤0.01% |
169,200
+72,700
| +75% | +$2.36M |
|
1396
UiPath
PATH
$5.62B
| $5.63M | ﹤0.01% |
442,951
+173,940
| +65% | +$2.3M |
|
1397
CALL
Lumentum
LITE
$59.4B
| $5.62M | ﹤0.01% |
67,000
-39,900
| -37% | -$3.11M |
|
1398
CALL
Sensata Technologies
ST
$6.65B
| $5.62M | ﹤0.01% |
205,100
+202,500
| +7,788% | +$6.58M |
|
|
HUT
1399
PUT
Hut 8
HUT
$12.4B
| $5.61M | ﹤0.01% |
273,900
-45,700
| -14% | -$933K |
|
|
EH
1400
PUT
EHang Holdings
EH
$372M
| $5.6M | ﹤0.01% |
355,900
+212,100
| +147% | +$3.41M |
|
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.