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 | |
|---|---|---|---|---|---|---|
401
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $32.3M | 0.03% |
895,400
+408,800
| +84% | +$8.21M |
|
402
PUT
General Mills
GIS
$19.7B
| $32.2M | 0.03% |
376,900
-115,200
| -23% | -$9.2M |
|
403
PUT
Waste Management
WM
$94.9B
| $32.2M | 0.03% |
197,300
+117,100
| +146% | +$17.9M |
|
404
CALL
American Tower
AMT
$77.4B
| $32.1M | 0.03% |
156,900
+42,900
| +38% | +$9M |
|
405
CALL
Aon
AON
$75.2B
| $32M | 0.03% |
101,500
+44,500
| +78% | +$13.8M |
|
406
CALL
Cameco
CCJ
$39.4B
| $31.9M | 0.03% |
1,218,700
+384,900
| +46% | +$10.2M |
|
407
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $31.9M | 0.03% |
17,147
+31
| +0.2% | +$44.2K |
|
408
PUT
Newmont
NEM
$102B
| $31.8M | 0.03% |
704,000
-508,700
| -42% | -$24.7M |
|
409
Starbucks
SBUX
$119B
| $31.7M | 0.03% |
+303,977
| New | +$31.6M |
|
410
CALL
Emerson Electric
EMR
$78.2B
| $31.6M | 0.03% |
363,100
+67,200
| +23% | +$5.87M |
|
411
PUT
Estee Lauder
EL
$29.9B
| $31.6M | 0.03% |
128,300
+26,100
| +26% | +$6.63M |
|
412
CALL
Wheaton Precious Metals
WPM
$50.6B
| $31.5M | 0.03% |
654,800
+302,700
| +86% | +$13.2M |
|
413
CALL
Cheniere Energy
LNG
$56B
| $31.5M | 0.03% |
199,900
+55,500
| +38% | +$8.38M |
|
414
PUT
Ally Financial
ALLY
$13.7B
| $31.5M | 0.03% |
1,235,100
+853,700
| +224% | +$24.5M |
|
|
SPLK
415
PUT
DELISTED
Splunk Inc
SPLK
| $31.2M | 0.03% |
325,100
+27,000
| +9% | +$2.59M |
|
416
PUT
Avis
CAR
$5.81B
| $31.1M | 0.03% |
159,500
+103,200
| +183% | +$20.7M |
|
417
PUT
Workday
WDAY
$32.7B
| $30.6M | 0.03% |
148,400
-87,000
| -37% | -$15.8M |
|
418
KraneShares CSI China Internet ETF
KWEB
$5.23B
| $30.6M | 0.03% |
982,110
+730,387
| +290% | +$23.4M |
|
419
CALL
Bilibili
BILI
$7.4B
| $30.6M | 0.03% |
1,302,200
+22,500
| +2% | +$535K |
|
420
CALL
On Holding
ONON
$12.2B
| $30.6M | 0.03% |
985,100
+676,300
| +219% | +$15.3M |
|
|
LSI
421
PUT
DELISTED
Life Storage, Inc.
LSI
| $30.6M | 0.03% |
233,100
+232,900
| +116,450% | +$26.9M |
|
422
PUT
Prologis
PLD
$135B
| $30.4M | 0.03% |
244,000
-4,700
| -2% | -$578K |
|
423
PUT
Alcoa
AA
$12.2B
| $30.4M | 0.03% |
714,600
+68,900
| +11% | +$3.32M |
|
424
PUT
Take-Two Interactive
TTWO
$43.4B
| $30.4M | 0.03% |
254,500
-222,800
| -47% | -$24.8M |
|
425
PUT
Petrobras
PBR
$122B
| $30.3M | 0.03% |
2,912,200
-438,400
| -13% | -$4.77M |
|
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.