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 | |
|---|---|---|---|---|---|---|
1451
British American Tobacco
BTI
$132B
| $6.15M | ﹤0.01% |
201,539
+124,616
| +162% | +$3.75M |
|
1452
PUT
Diageo
DEO
$46.2B
| $6.14M | ﹤0.01% |
41,300
+22,000
| +114% | +$3.22M |
|
1453
Wolfspeed
WOLF
$1.2B
| $6.13M | ﹤0.01% |
207,659
+137,208
| +195% | +$4.14M |
|
1454
CALL
Fair Isaac
FICO
$28.7B
| $6.12M | ﹤0.01% |
4,900
+1,200
| +32% | +$1.5M |
|
1455
PUT
Fastly Inc
FSLY
$3.17B
| $6.12M | ﹤0.01% |
471,900
+94,600
| +25% | +$1.6M |
|
1456
Edwards Lifesciences
EW
$47.6B
| $6.12M | ﹤0.01% |
64,004
+36,021
| +129% | +$3.03M |
|
1457
CALL
Thor Industries
THO
$3.99B
| $6.11M | ﹤0.01% |
52,100
-3,100
| -6% | -$355K |
|
1458
PUT
AerCap
AER
$23.9B
| $6.08M | ﹤0.01% |
70,000
-12,300
| -15% | -$966K |
|
1459
PUT
Enterprise Products Partners
EPD
$83.8B
| $6.08M | ﹤0.01% |
208,400
+14,600
| +8% | +$401K |
|
|
1460
CALL
British American Tobacco
BTI
$132B
| $6.08M | ﹤0.01% |
199,300
-122,900
| -38% | -$3.7M |
|
1461
PUT
Southern Copper
SCCO
$141B
| $6.06M | ﹤0.01% |
61,379
+647
| +1% | +$51.7K |
|
1462
PUT
Madrigal Pharmaceuticals
MDGL
$12.6B
| $6.04M | ﹤0.01% |
22,600
+14,200
| +169% | +$3.35M |
|
|
DOOR
1463
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $6.01M | ﹤0.01% |
45,730
+36,530
| +397% | +$4.12M |
|
1464
CALL
Factset
FDS
$9.05B
| $6M | ﹤0.01% |
13,200
+12,900
| +4,300% | +$6.01M |
|
1465
CALL
Mattel
MAT
$4.17B
| $5.99M | ﹤0.01% |
302,600
+109,500
| +57% | +$2.07M |
|
1466
PUT
Waters Corp
WAT
$36.8B
| $5.99M | ﹤0.01% |
17,400
-21,500
| -55% | -$7.07M |
|
1467
PUT
argenx
ARGX
$57.4B
| $5.98M | ﹤0.01% |
15,200
-9,400
| -38% | -$3.64M |
|
1468
PUT
XP
XP
$8.62B
| $5.98M | ﹤0.01% |
233,200
+188,500
| +422% | +$4.73M |
|
1469
PUT
ZIM Integrated Shipping Services
ZIM
$3B
| $5.97M | ﹤0.01% |
590,100
+124,800
| +27% | +$1.52M |
|
1470
PUT
WEC Energy
WEC
$37.7B
| $5.97M | ﹤0.01% |
72,700
+9,400
| +15% | +$756K |
|
1471
CALL
AGCO
AGCO
$8.78B
| $5.97M | ﹤0.01% |
48,500
+18,500
| +62% | +$2.15M |
|
|
AGTI
1472
PUT
DELISTED
Agiliti Inc
AGTI
| $5.96M | ﹤0.01% |
+589,500
| New | +$4.94M |
|
|
MDC
1473
PUT
DELISTED
M.D.C. Holdings, Inc.
MDC
| $5.96M | ﹤0.01% |
94,800
+4,500
| +5% | +$275K |
|
1474
CALL
SharkNinja
SN
$21B
| $5.96M | ﹤0.01% |
95,700
+84,700
| +770% | +$4.48M |
|
1475
CALL
Semtech
SMTC
$11.7B
| $5.96M | ﹤0.01% |
216,800
+124,100
| +134% | +$2.65M |
|
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.