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 | |
|---|---|---|---|---|---|---|
1626
PUT
Teradyne
TER
$54.8B
| $3M | ﹤0.01% |
27,900
+17,500
| +168% | +$1.79M |
|
1627
Madrigal Pharmaceuticals
MDGL
$12.6B
| $3M | ﹤0.01% |
+12,364
| New | +$3.37M |
|
1628
PUT
Itaú Unibanco
ITUB
$91.3B
| $2.99M | ﹤0.01% |
696,115
-16,202
| -2% | -$68.7K |
|
1629
PUT
GDS Holdings
GDS
$6.34B
| $2.99M | ﹤0.01% |
160,100
+127,200
| +387% | +$2.69M |
|
1630
PUT
Freshpet
FRPT
$2.83B
| $2.98M | ﹤0.01% |
45,100
+23,400
| +108% | +$1.44M |
|
1631
PUT
Franklin Resources
BEN
$16.9B
| $2.98M | ﹤0.01% |
110,800
+74,700
| +207% | +$2.18M |
|
1632
CALL
Alamos Gold
AGI
$12.4B
| $2.98M | ﹤0.01% |
243,900
+181,500
| +291% | +$1.97M |
|
|
JNPR
1633
CALL
DELISTED
Juniper Networks
JNPR
| $2.98M | ﹤0.01% |
86,600
-1,900
| -2% | -$60.1K |
|
1634
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $2.98M | ﹤0.01% |
41,100
-70,800
| -63% | -$5.12M |
|
1635
PUT
Qorvo
QRVO
$7.63B
| $2.98M | ﹤0.01% |
29,300
-31,800
| -52% | -$3.23M |
|
1636
PUT
Murphy Oil
MUR
$5.58B
| $2.97M | ﹤0.01% |
80,400
+29,700
| +59% | +$1.19M |
|
1637
CALL
American Eagle Outfitters
AEO
$2.85B
| $2.97M | ﹤0.01% |
220,900
-96,000
| -30% | -$1.41M |
|
1638
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $2.96M | ﹤0.01% |
36,500
-14,000
| -28% | -$1.21M |
|
1639
iShares TIPS Bond ETF
TIP
$14.5B
| $2.96M | ﹤0.01% |
26,832
+26,677
| +17,211% | +$2.89M |
|
1640
CALL
W.P. Carey
WPC
$17.1B
| $2.96M | ﹤0.01% |
39,002
+18,480
| +90% | +$1.47M |
|
1641
PUT
monday.com
MNDY
$3.27B
| $2.95M | ﹤0.01% |
20,700
+16,200
| +360% | +$2.19M |
|
1642
CALL
Lamar Advertising Co
LAMR
$16.2B
| $2.93M | ﹤0.01% |
29,300
+14,100
| +93% | +$1.43M |
|
|
AY
1643
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $2.92M | ﹤0.01% |
98,819
+95,436
| +2,821% | +$2.59M |
|
1644
PUT
Aclaris Therapeutics
ACRS
$730M
| $2.91M | ﹤0.01% |
360,300
+360,100
| +180,050% | +$4.57M |
|
1645
PUT
Invitation Homes
INVH
$17.7B
| $2.91M | ﹤0.01% |
93,100
-117,900
| -56% | -$3.69M |
|
1646
PUT
Noble Corp
NE
$6.9B
| $2.9M | ﹤0.01% |
73,500
+68,200
| +1,287% | +$2.73M |
|
1647
CALL
Gartner
IT
$9.41B
| $2.9M | ﹤0.01% |
8,900
+4,000
| +82% | +$1.32M |
|
1648
CALL
Samsara
IOT
$19.3B
| $2.9M | ﹤0.01% |
146,900
+71,700
| +95% | +$1.14M |
|
1649
PUT
VeriSign
VRSN
$25.5B
| $2.9M | ﹤0.01% |
13,700
+2,900
| +27% | +$598K |
|
|
1650
CALL
Itaú Unibanco
ITUB
$91.3B
| $2.89M | ﹤0.01% |
671,756
-42,601
| -6% | -$181K |
|
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.