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 | |
|---|---|---|---|---|---|---|
276
CALL
Spotify
SPOT
$98.1B
| $58.6M | 0.03% |
131,000
-109,400
| -46% | -$46.8M |
|
277
PUT
NextEra Energy
NEE
$185B
| $58.2M | 0.03% |
811,700
-915,800
| -53% | -$71.1M |
|
278
PUT
Fortinet
FTNT
$114B
| $57.9M | 0.03% |
613,200
-2,900
| -0.5% | -$258K |
|
279
PUT
Humana
HUM
$48B
| $57.8M | 0.03% |
227,900
-34,000
| -13% | -$9.12M |
|
280
PUT
PepsiCo
PEP
$185B
| $57.8M | 0.03% |
379,900
-55,700
| -13% | -$9.13M |
|
281
CALL
GameStop
GME
$9.74B
| $56.5M | 0.03% |
1,802,300
+20,600
| +1% | +$528K |
|
282
CALL
Lennar Class A
LEN
$19.7B
| $56M | 0.03% |
424,150
+177,263
| +72% | +$28.8M |
|
283
PUT
Coca-Cola
KO
$355B
| $55.7M | 0.03% |
895,000
+103,400
| +13% | +$6.75M |
|
284
CALL
Warner Bros
WBD
$64.8B
| $55.6M | 0.03% |
5,260,400
+2,267,900
| +76% | +$21.1M |
|
285
CALL
Caterpillar
CAT
$415B
| $55.3M | 0.03% |
152,400
-72,400
| -32% | -$28.1M |
|
286
PUT
Newmont
NEM
$103B
| $55.3M | 0.03% |
1,484,500
+403,200
| +37% | +$18.4M |
|
287
PUT
GE Aerospace
GE
$357B
| $55.2M | 0.03% |
394,800
-186,500
| -32% | -$33.3M |
|
288
PUT
T-Mobile US
TMUS
$206B
| $54.6M | 0.03% |
247,300
-50,100
| -17% | -$11.4M |
|
|
B
289
CALL
Barrick Mining
B
$62.9B
| $54.5M | 0.03% |
3,518,100
+627,800
| +22% | +$11.4M |
|
290
CALL
Hershey
HSY
$34.9B
| $54.4M | 0.03% |
321,300
+127,500
| +66% | +$22.9M |
|
|
291
NVIDIA
NVDA
$5.16T
| $54.2M | 0.03% |
403,972
-967,442
| -71% | -$133M |
|
292
CALL
DoorDash
DASH
$77.9B
| $54.1M | 0.03% |
322,600
+92,300
| +40% | +$15.2M |
|
293
PUT
Trump Media & Technology Group
DJT
$2.68B
| $53.3M | 0.03% |
1,561,600
-329,700
| -17% | -$10.5M |
|
294
CALL
Union Pacific
UNP
$174B
| $52.9M | 0.03% |
232,000
-33,300
| -13% | -$7.88M |
|
295
CALL
Marriott International
MAR
$97.5B
| $52.3M | 0.03% |
187,600
+107,300
| +134% | +$29.5M |
|
296
CALL
Danaher
DHR
$125B
| $52.3M | 0.03% |
239,500
-52,100
| -18% | -$12.8M |
|
|
297
CALL
T-Mobile US
TMUS
$206B
| $52M | 0.03% |
235,700
-30,100
| -11% | -$6.85M |
|
298
PUT
Datadog
DDOG
$88.3B
| $51.6M | 0.03% |
361,100
-189,600
| -34% | -$26M |
|
299
PUT
United Parcel Service
UPS
$99.1B
| $51.5M | 0.03% |
408,700
-73,600
| -15% | -$9.69M |
|
300
CALL
3M
MMM
$89.7B
| $51.2M | 0.03% |
1,011,500
+128,400
| +15% | +$16.8M |
|
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.