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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
CALL
C3.ai
AI
$1.27B
| $25.1M | 0.02% |
747,400
+516,600
| +224% | +$10.6M |
|
502
PUT
RTX Corp
RTX
$262B
| $25M | 0.02% |
255,600
-7,400
| -3% | -$729K |
|
503
CALL
Peloton Interactive
PTON
$2.71B
| $25M | 0.02% |
2,203,500
-82,600
| -4% | -$993K |
|
504
PUT
Prudential Financial
PRU
$41.3B
| $25M | 0.02% |
301,700
+13,600
| +5% | +$1.3M |
|
505
CALL
American International
AIG
$41.5B
| $24.9M | 0.02% |
495,000
+209,200
| +73% | +$12.2M |
|
506
CALL
Colgate-Palmolive
CL
$73.3B
| $24.9M | 0.02% |
331,700
+237,200
| +251% | +$17.6M |
|
507
CALL
Western Digital
WDC
$192B
| $24.8M | 0.02% |
870,137
+46,702
| +6% | +$1.37M |
|
508
PUT
Academy Sports + Outdoors
ASO
$3.03B
| $24.7M | 0.02% |
379,200
+35,100
| +10% | +$2.07M |
|
509
UnitedHealth
UNH
$392B
| $24.7M | 0.02% |
+52,281
| New | +$25.2M |
|
510
CALL
Generac Holdings
GNRC
$12.6B
| $24.5M | 0.02% |
226,800
-127,800
| -36% | -$14.8M |
|
511
PUT
Altria Group
MO
$121B
| $24.4M | 0.02% |
547,800
-7,600
| -1% | -$349K |
|
512
PUT
Caesars Entertainment
CZR
$6.1B
| $24.3M | 0.02% |
498,600
-73,400
| -13% | -$3.6M |
|
513
PUT
Rivian
RIVN
$24.9B
| $24.3M | 0.02% |
1,569,300
+722,500
| +85% | +$12.2M |
|
514
CALL
SolarEdge
SEDG
$2.91B
| $24.3M | 0.02% |
79,800
+35,400
| +80% | +$10.8M |
|
515
PUT
Builders FirstSource
BLDR
$7.64B
| $24.1M | 0.02% |
272,000
+161,400
| +146% | +$12.8M |
|
516
CALL
VanEck Durable High Dividend ETF
DURA
$38.5M
| $24.1M | 0.02% |
99,900
-102,700
| -51% | -$3.23M |
|
517
PUT
United States Oil Fund
USO
$2.36B
| $24.1M | 0.02% |
362,200
-140,900
| -28% | -$9.39M |
|
|
SHNY
518
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $24.1M | 0.02% |
1,277,800
+955,900
| +297% | +$18M |
|
519
PUT
General Dynamics
GD
$101B
| $23.8M | 0.02% |
104,500
-10,800
| -9% | -$2.5M |
|
520
CALL
Northrop Grumman
NOC
$74.6B
| $23.8M | 0.02% |
51,600
-52,100
| -50% | -$24.2M |
|
521
CALL
Nutrien
NTR
$32.9B
| $23.8M | 0.02% |
321,700
+55,200
| +21% | +$4.26M |
|
522
CALL
McKesson
MCK
$95.3B
| $23.7M | 0.02% |
66,700
+600
| +0.9% | +$217K |
|
523
Pinduoduo
PDD
$119B
| $23.7M | 0.02% |
312,591
+312,391
| +156,196% | +$28.2M |
|
524
CALL
Sony
SONY
$123B
| $23.6M | 0.02% |
1,302,500
+174,500
| +15% | +$3.02M |
|
525
CALL
Ally Financial
ALLY
$13.7B
| $23.5M | 0.02% |
922,300
+751,200
| +439% | +$21.5M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.