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 | |
|---|---|---|---|---|---|---|
1426
Comcast
CMCSA
$79.1B
| $6.36M | ﹤0.01% |
+146,788
| New | +$6.33M |
|
1427
CALL
Monster Beverage
MNST
$91.4B
| $6.35M | ﹤0.01% |
107,100
-72,000
| -40% | -$4.14M |
|
1428
CALL
GlobalFoundries
GFS
$29.4B
| $6.35M | ﹤0.01% |
121,800
+33,100
| +37% | +$1.81M |
|
1429
CALL
CDW
CDW
$17.1B
| $6.34M | ﹤0.01% |
24,800
-7,100
| -22% | -$1.69M |
|
|
XIFR
1430
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $6.33M | ﹤0.01% |
210,500
-10,900
| -5% | -$310K |
|
|
GTLS
1431
PUT
DELISTED
Chart Industries
GTLS
| $6.31M | ﹤0.01% |
38,300
+3,300
| +9% | +$443K |
|
1432
CALL
Middleby
MIDD
$6.05B
| $6.3M | ﹤0.01% |
39,200
-4,700
| -11% | -$692K |
|
|
CGC
1433
PUT
Canopy Growth
CGC
$375M
| $6.3M | ﹤0.01% |
729,700
+257,700
| +55% | +$1.11M |
|
1434
PUT
California Resources
CRC
$4.75B
| $6.28M | ﹤0.01% |
114,000
+48,000
| +73% | +$2.51M |
|
1435
CALL
Equinor
EQNR
$95.9B
| $6.28M | ﹤0.01% |
232,300
-165,300
| -42% | -$4.53M |
|
1436
PUT
Public Storage
PSA
$60.2B
| $6.26M | ﹤0.01% |
21,600
-8,600
| -28% | -$2.47M |
|
1437
QuantumScape Corp
QS
$3B
| $6.26M | ﹤0.01% |
995,634
+564,578
| +131% | +$3.8M |
|
1438
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $6.26M | ﹤0.01% |
102,200
-155,600
| -60% | -$9.71M |
|
1439
CALL
Agilent Technologies
A
$39.1B
| $6.26M | ﹤0.01% |
43,000
-3,100
| -7% | -$425K |
|
|
JWN
1440
CALL
DELISTED
Nordstrom
JWN
| $6.25M | ﹤0.01% |
308,600
+12,900
| +4% | +$244K |
|
1441
Vanguard Mid-Cap ETF
VO
$106B
| $6.25M | ﹤0.01% |
100,060
+41,868
| +72% | +$2.47M |
|
1442
PUT
CSX Corp
CSX
$98.6B
| $6.24M | ﹤0.01% |
168,200
+42,800
| +34% | +$1.56M |
|
1443
PUT
BioMarin Pharmaceuticals
BMRN
$11.5B
| $6.21M | ﹤0.01% |
71,100
-5,400
| -7% | -$483K |
|
1444
CALL
YPF
YPF
$20.2B
| $6.2M | ﹤0.01% |
313,000
-268,000
| -46% | -$4.65M |
|
|
ITCI
1445
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $6.19M | ﹤0.01% |
89,400
+66,900
| +297% | +$4.6M |
|
1446
Vodafone
VOD
$34.9B
| $6.18M | ﹤0.01% |
694,480
+164,238
| +31% | +$1.43M |
|
|
AD
1447
CALL
Array Digital Infrastructure
AD
$3.02B
| $6.16M | ﹤0.01% |
168,900
-29,800
| -15% | -$1.16M |
|
1448
CALL
Vornado Realty Trust
VNO
$7.47B
| $6.16M | ﹤0.01% |
214,100
-237,000
| -53% | -$6.33M |
|
1449
CALL
Signet Jewelers
SIG
$3.55B
| $6.15M | ﹤0.01% |
61,500
-63,900
| -51% | -$6.39M |
|
1450
CALL
Northern Oil and Gas
NOG
$2.3B
| $6.15M | ﹤0.01% |
155,000
+53,900
| +53% | +$1.91M |
|
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.