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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.27% |
| 2 | Technology | 0.53% |
| 3 | Consumer Discretionary | 0.29% |
| 4 | Healthcare | 0.21% |
| 5 | Financials | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PUT
Chewy
CHWY
$9.69B
| $41.5M | 0.03% |
1,523,000
+251,600
| +20% | +$4.79M |
|
352
PUT
Gilead Sciences
GILD
$187B
| $41.3M | 0.03% |
602,600
+114,700
| +24% | +$7.65M |
|
353
CALL
Invesco Aerospace & Defense ETF
PPA
$7.91B
| $41.3M | 0.03% |
266,100
-23,400
| -8% | -$2.4M |
|
354
CALL
NRG Energy
NRG
$25B
| $41M | 0.03% |
526,600
+101,900
| +24% | +$7.89M |
|
355
PUT
DoorDash
DASH
$91.7B
| $41M | 0.03% |
376,800
-80,400
| -18% | -$9.68M |
|
356
PUT
Digital Realty Trust
DLR
$69.9B
| $40.9M | 0.03% |
269,000
-67,600
| -20% | -$9.71M |
|
357
CALL
Coupang
CPNG
$27.5B
| $40.9M | 0.03% |
1,952,300
+251,900
| +15% | +$5.46M |
|
358
CALL
Enphase Energy
ENPH
$4.81B
| $40.9M | 0.03% |
409,900
-97,100
| -19% | -$11.3M |
|
359
PUT
Snap
SNAP
$9.25B
| $40.6M | 0.03% |
2,447,300
-678,700
| -22% | -$9.74M |
|
360
PUT
Cameco
CCJ
$43.9B
| $40.6M | 0.03% |
824,900
-144,000
| -15% | -$7.3M |
|
361
CALL
Marathon Petroleum
MPC
$109B
| $40.2M | 0.02% |
231,900
-51,900
| -18% | -$9.65M |
|
|
362
PUT
Enphase Energy
ENPH
$4.81B
| $40.1M | 0.02% |
402,300
-321,700
| -44% | -$37.5M |
|
363
PUT
DexCom
DXCM
$33.2B
| $39.8M | 0.02% |
350,900
-70,100
| -17% | -$8.86M |
|
364
CALL
Southern Company
SO
$101B
| $39.5M | 0.02% |
509,400
+283,100
| +125% | +$21.5M |
|
365
PUT
Trump Media & Technology Group
DJT
$2.51B
| $39.3M | 0.02% |
1,199,600
+558,000
| +87% | +$23.4M |
|
366
PUT
Celsius Holdings
CELH
$7.76B
| $39.1M | 0.02% |
684,800
+175,800
| +35% | +$13.3M |
|
367
CALL
3M
MMM
$86.9B
| $39M | 0.02% |
846,400
-93,536
| -10% | -$9.12M |
|
368
CALL
SLB Ltd
SLB
$85.3B
| $38.7M | 0.02% |
821,200
-103,900
| -11% | -$5.02M |
|
369
PUT
Best Buy
BBY
$19B
| $38.7M | 0.02% |
459,000
+177,200
| +63% | +$14.1M |
|
370
PUT
Abbott
ABT
$187B
| $38.7M | 0.02% |
372,300
-4,200
| -1% | -$445K |
|
371
PUT
Trade Desk
TTD
$6.78B
| $38.6M | 0.02% |
395,000
-133,700
| -25% | -$12.1M |
|
372
PUT
MongoDB
MDB
$29.7B
| $38.4M | 0.02% |
153,800
-60,300
| -28% | -$19M |
|
373
PUT
Live Nation Entertainment
LYV
$40.4B
| $38.3M | 0.02% |
409,100
-39,700
| -9% | -$3.75M |
|
374
CALL
Analog Devices
ADI
$176B
| $38.1M | 0.02% |
167,100
-116,500
| -41% | -$24.9M |
|
375
PUT
Fortinet
FTNT
$115B
| $38.1M | 0.02% |
631,900
+196,500
| +45% | +$12.2M |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2024 filing shows 1,358 new, 3,196 increased, 4,061 reduced and 1,431 closed positions. Its largest new stake was Citigroup: 1,213,247 shares worth $77M. The largest sale was State Street Energy Select Sector SPDR ETF, an estimated $94.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.