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 | |
|---|---|---|---|---|---|---|
351
CALL
PepsiCo
PEP
$185B
| $43.1M | 0.02% |
283,300
-183,700
| -39% | -$30.1M |
|
352
CALL
On Holding
ONON
$12.2B
| $42.9M | 0.02% |
784,100
+43,900
| +6% | +$2.33M |
|
353
PUT
Boston Scientific
BSX
$63.9B
| $42.8M | 0.02% |
479,600
-38,900
| -8% | -$3.42M |
|
354
PUT
Hershey
HSY
$35B
| $42.8M | 0.02% |
252,800
+155,500
| +160% | +$27.9M |
|
355
CALL
Snap
SNAP
$7.52B
| $42.7M | 0.02% |
3,964,500
+638,300
| +19% | +$7.2M |
|
356
PUT
Blackrock
BLK
$164B
| $42.3M | 0.02% |
41,300
-24,400
| -37% | -$24.8M |
|
357
PUT
Upstart Holdings
UPST
$2.74B
| $42.3M | 0.02% |
687,600
-29,900
| -4% | -$1.86M |
|
358
CALL
TJX Companies
TJX
$172B
| $42.3M | 0.02% |
349,800
-79,200
| -18% | -$9.45M |
|
359
CALL
Riot Platforms
RIOT
$8.84B
| $42.2M | 0.02% |
4,133,400
+1,820,200
| +79% | +$19.8M |
|
360
PUT
SLB Ltd
SLB
$71.3B
| $42.1M | 0.02% |
1,099,200
+385,800
| +54% | +$16.2M |
|
361
PUT
Merck
MRK
$315B
| $42.1M | 0.02% |
423,600
+43,100
| +11% | +$4.44M |
|
362
Pfizer
PFE
$141B
| $41.6M | 0.02% |
1,566,653
+1,303,687
| +496% | +$35.4M |
|
363
CALL
Teva Pharmaceuticals
TEVA
$35.1B
| $41.4M | 0.02% |
1,879,000
+87,900
| +5% | +$1.6M |
|
364
PUT
Baidu
BIDU
$36.6B
| $41.2M | 0.02% |
488,600
-52,200
| -10% | -$4.77M |
|
365
PUT
Norwegian Cruise Line
NCLH
$8.87B
| $41.1M | 0.02% |
1,595,700
+25,800
| +2% | +$652K |
|
366
CALL
Humana
HUM
$47.7B
| $41M | 0.02% |
161,500
-78,500
| -33% | -$21.1M |
|
367
PUT
e.l.f. Beauty
ELF
$4.66B
| $41M | 0.02% |
326,300
-46,200
| -12% | -$5.54M |
|
368
CALL
Eaton
ETN
$158B
| $40.9M | 0.02% |
123,300
-16,900
| -12% | -$5.93M |
|
369
PUT
Amgen
AMGN
$198B
| $40.8M | 0.02% |
156,500
-80,300
| -34% | -$23.8M |
|
370
PUT
Gilead Sciences
GILD
$162B
| $40.7M | 0.02% |
440,800
-167,500
| -28% | -$15.1M |
|
371
CALL
Halliburton
HAL
$27.6B
| $40.3M | 0.02% |
1,506,800
-13,200
| -0.9% | -$386K |
|
372
PUT
SoundHound AI
SOUN
$2.81B
| $40.1M | 0.02% |
2,022,800
+1,576,900
| +354% | +$15.2M |
|
373
Invesco QQQ Trust
QQQ
$469B
| $39.4M | 0.02% |
+77,023
| New | +$39M |
|
374
CALL
Dollar Tree
DLTR
$23.5B
| $39.3M | 0.02% |
525,000
-163,800
| -24% | -$11.2M |
|
375
CALL
Nu Holdings
NU
$70.1B
| $39.3M | 0.02% |
3,792,000
+560,300
| +17% | +$7.45M |
|
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.