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 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PUT
Roku
ROKU
$21.2B
| $48.5M | 0.03% |
743,800
-5,500
| -0.7% | -$428K |
|
352
PUT
Union Pacific
UNP
$174B
| $48M | 0.03% |
195,100
-209,400
| -52% | -$51.5M |
|
353
PUT
Alcoa
AA
$12.2B
| $47.8M | 0.03% |
1,415,700
+154,300
| +12% | +$4.51M |
|
354
CALL
Celsius Holdings
CELH
$7.28B
| $47.7M | 0.03% |
575,200
+101,800
| +22% | +$6.98M |
|
355
PUT
Wayfair
W
$11.1B
| $47.5M | 0.03% |
700,500
-561,600
| -44% | -$31.8M |
|
356
PUT
Live Nation Entertainment
LYV
$41.4B
| $47.5M | 0.03% |
448,800
+111,400
| +33% | +$10.5M |
|
357
CALL
Li Auto
LI
$12B
| $47.3M | 0.03% |
1,562,700
-689,400
| -31% | -$22.8M |
|
358
CALL
Dow Inc
DOW
$22.5B
| $47.3M | 0.03% |
815,700
+200,300
| +33% | +$11.1M |
|
359
CALL
Apollo Global Management
APO
$68.6B
| $46.6M | 0.03% |
414,700
-57,400
| -12% | -$6.06M |
|
360
CALL
ConocoPhillips
COP
$145B
| $46.6M | 0.03% |
366,100
-201,600
| -36% | -$23M |
|
361
CALL
Dollar Tree
DLTR
$23.5B
| $46.3M | 0.03% |
347,600
-24,500
| -7% | -$3.37M |
|
362
PUT
Trade Desk
TTD
$8.26B
| $46.2M | 0.03% |
528,700
+185,500
| +54% | +$14.1M |
|
363
PUT
Pinterest
PINS
$12.6B
| $46.2M | 0.03% |
1,332,900
+185,900
| +16% | +$6.76M |
|
364
CALL
Invesco Aerospace & Defense ETF
PPA
$8.03B
| $45.9M | 0.03% |
289,500
-175,300
| -38% | -$16.6M |
|
|
365
Alibaba
BABA
$279B
| $45.6M | 0.03% |
630,426
-1,129,842
| -64% | -$82.8M |
|
366
PUT
PNC Financial Services
PNC
$101B
| $45.6M | 0.03% |
282,000
+105,200
| +60% | +$15.9M |
|
367
JD.com
JD
$40.7B
| $45.4M | 0.03% |
1,656,014
-418,232
| -20% | -$10.2M |
|
368
PUT
Lennar Class A
LEN
$19.8B
| $45.2M | 0.03% |
271,679
-153,297
| -36% | -$23M |
|
|
WBA
369
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $44.7M | 0.03% |
2,060,000
+681,100
| +49% | +$15.1M |
|
370
PayPal
PYPL
$49B
| $44.4M | 0.03% |
663,227
+160,648
| +32% | +$9.86M |
|
371
PUT
Proshares UltraShort Technology
REW
$3.3M
| $44.4M | 0.03% |
246,650
+33,550
| +16% | +$1.97M |
|
372
PUT
Edwards Lifesciences
EW
$48.6B
| $44.2M | 0.03% |
462,600
+46,700
| +11% | +$3.92M |
|
373
PUT
Cytokinetics
CYTK
$11.2B
| $44M | 0.03% |
627,000
+167,000
| +36% | +$12.9M |
|
374
Advanced Micro Devices
AMD
$901B
| $43.9M | 0.03% |
+243,264
| New | +$42.5M |
|
375
PUT
Medtronic
MDT
$105B
| $43.7M | 0.03% |
501,700
-64,500
| -11% | -$5.5M |
|
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, 3,675 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 Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- 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.