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 | |
|---|---|---|---|---|---|---|
201
PUT
JD.com
JD
$41.1B
| $80.7M | 0.05% |
2,326,300
-104,000
| -4% | -$4.03M |
|
|
NVO
202
PUT
Novo Nordisk
NVO
$218B
| $79.6M | 0.04% |
925,400
+123,100
| +15% | +$13.3M |
|
203
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $79.5M | 0.04% |
3,271,500
-599,700
| -15% | -$15.4M |
|
204
CALL
GE Aerospace
GE
$353B
| $79.3M | 0.04% |
491,800
-102,700
| -17% | -$18.3M |
|
205
PUT
Verizon
VZ
$183B
| $78.7M | 0.04% |
1,967,300
+363,500
| +23% | +$15.3M |
|
206
PUT
Freeport-McMoran
FCX
$89.9B
| $78.5M | 0.04% |
2,062,100
+162,800
| +9% | +$7.28M |
|
|
207
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $78.5M | 0.04% |
3,278,600
-764,800
| -19% | -$19.7M |
|
208
PUT
General Motors
GM
$71.7B
| $78M | 0.04% |
1,464,900
+50,300
| +4% | +$2.63M |
|
209
PUT
McDonald's
MCD
$188B
| $77.5M | 0.04% |
267,300
+300
| +0.1% | +$89.5K |
|
210
PUT
Vistra
VST
$54.7B
| $77.5M | 0.04% |
562,000
-726,200
| -56% | -$101M |
|
211
PUT
SoFi Technologies
SOFI
$22.6B
| $76.4M | 0.04% |
4,963,700
+1,859,200
| +60% | +$24.1M |
|
212
CALL
United Parcel Service
UPS
$98.9B
| $76.3M | 0.04% |
605,200
+135,000
| +29% | +$17.8M |
|
213
PUT
Proshares UltraShort Technology
REW
$3.27M
| $76.3M | 0.04% |
685,250
+168,275
| +33% | +$6.97M |
|
214
PUT
Applied Materials
AMAT
$448B
| $76.2M | 0.04% |
468,700
-107,800
| -19% | -$19.5M |
|
215
CALL
Mastercard
MA
$476B
| $75.7M | 0.04% |
143,800
-34,000
| -19% | -$17.6M |
|
216
CALL
Zoom
ZM
$26.3B
| $75.6M | 0.04% |
926,200
+263,900
| +40% | +$20.7M |
|
217
PUT
FedEx
FDX
$73.1B
| $75.3M | 0.04% |
267,700
-92,700
| -26% | -$25.9M |
|
218
CALL
Invesco Aerospace & Defense ETF
PPA
$7.97B
| $75.2M | 0.04% |
450,700
+288,900
| +179% | +$34.1M |
|
219
CALL
MongoDB
MDB
$24.7B
| $74.9M | 0.04% |
321,700
+86,500
| +37% | +$24.4M |
|
220
CALL
RTX Corp
RTX
$261B
| $74.6M | 0.04% |
645,000
-241,500
| -27% | -$29.2M |
|
221
PUT
Johnson & Johnson
JNJ
$603B
| $73.8M | 0.04% |
510,100
-105,700
| -17% | -$16.4M |
|
222
PUT
American Express
AXP
$239B
| $73.2M | 0.04% |
246,500
-2,400
| -1% | -$690K |
|
223
CALL
Texas Instruments
TXN
$265B
| $71.7M | 0.04% |
382,300
-162,400
| -30% | -$32.5M |
|
|
224
Intel
INTC
$530B
| $71.6M | 0.04% |
3,570,940
+2,012,704
| +129% | +$45.4M |
|
225
CALL
Datadog
DDOG
$90.7B
| $71.5M | 0.04% |
500,100
+65,000
| +15% | +$8.93M |
|
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.