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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.34% |
| 2 | Technology | 0.38% |
| 3 | Healthcare | 0.28% |
| 4 | Consumer Discretionary | 0.25% |
| 5 | Industrials | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
451
Starbucks
SBUX
$119B
| $35.5M | 0.02% |
388,024
+296,303
| +323% | +$27.6M |
|
452
CALL
PENN Entertainment
PENN
$2.29B
| $35.5M | 0.02% |
1,947,100
+1,375,300
| +241% | +$28.4M |
|
453
PUT
Rivian
RIVN
$22.8B
| $35.2M | 0.02% |
3,211,300
+606,100
| +23% | +$8.74M |
|
454
CALL
Seagate
STX
$192B
| $35.1M | 0.02% |
377,300
+262,600
| +229% | +$23.1M |
|
455
PUT
Hershey
HSY
$34.8B
| $35M | 0.02% |
180,100
-3,500
| -2% | -$675K |
|
456
Broadcom
AVGO
$1.7T
| $35M | 0.02% |
264,170
+46,990
| +22% | +$5.82M |
|
457
PUT
United Rentals
URI
$62.9B
| $35M | 0.02% |
48,500
-193,300
| -80% | -$124M |
|
458
CALL
American International
AIG
$39.8B
| $34.8M | 0.02% |
445,500
+240,000
| +117% | +$17.1M |
|
459
CALL
Wingstop
WING
$2.97B
| $34.8M | 0.02% |
94,900
+48,800
| +106% | +$15.2M |
|
460
CALL
General Dynamics
GD
$97.2B
| $34.7M | 0.02% |
123,000
+21,600
| +21% | +$5.78M |
|
461
PUT
Capital One
COF
$135B
| $34.6M | 0.02% |
232,200
-118,700
| -34% | -$16.1M |
|
462
PUT
Vistra
VST
$50.1B
| $34.6M | 0.02% |
496,300
+310,600
| +167% | +$15.4M |
|
463
Micron Technology
MU
$1.15T
| $34.5M | 0.02% |
292,496
-84,212
| -22% | -$7.62M |
|
464
CALL
Abbott
ABT
$187B
| $34.4M | 0.02% |
302,700
-27,700
| -8% | -$3.18M |
|
465
PUT
3M
MMM
$86.9B
| $34.2M | 0.02% |
385,232
-8,611
| -2% | -$714K |
|
466
PUT
Marathon Petroleum
MPC
$109B
| $34.2M | 0.02% |
169,500
-97,900
| -37% | -$16.7M |
|
467
CALL
Applovin
APP
$107B
| $34M | 0.02% |
491,100
+303,400
| +162% | +$16.1M |
|
468
CALL
D.R. Horton
DHI
$39.9B
| $33.7M | 0.02% |
204,700
+7,500
| +4% | +$1.12M |
|
469
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$727M
| $33.6M | 0.02% |
751,200
+75,000
| +11% | +$1.59M |
|
470
PUT
Autodesk
ADSK
$45.5B
| $33.5M | 0.02% |
128,700
-47,400
| -27% | -$12M |
|
471
iShares Silver Trust
SLV
$32.2B
| $33.4M | 0.02% |
+1,469,127
| New | +$31.4M |
|
472
PUT
Cleveland-Cliffs
CLF
$7.13B
| $33.2M | 0.02% |
1,460,800
+312,400
| +27% | +$6.19M |
|
473
Marathon Digital Holdings
MARA
$4.37B
| $33M | 0.02% |
+1,460,702
| New | +$31.9M |
|
474
CALL
Gilead Sciences
GILD
$187B
| $33M | 0.02% |
450,200
+100,500
| +29% | +$7.73M |
|
|
475
CALL
Autodesk
ADSK
$45.5B
| $33M | 0.02% |
126,600
+10,000
| +9% | +$2.53M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,674 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.