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 | |
|---|---|---|---|---|---|---|
|
NOVA
1501
CALL
DELISTED
Sunnova Energy
NOVA
| $5.79M | ﹤0.01% |
944,300
+411,000
| +77% | +$3.71M |
|
1502
PUT
SBA Communications
SBAC
$18.4B
| $5.79M | ﹤0.01% |
26,700
+11,500
| +76% | +$2.56M |
|
1503
PUT
Avantor
AVTR
$7.81B
| $5.78M | ﹤0.01% |
225,900
-24,000
| -10% | -$571K |
|
1504
CALL
CoStar Group
CSGP
$11.3B
| $5.78M | ﹤0.01% |
59,800
-23,300
| -28% | -$2.01M |
|
1505
PUT
Teradyne
TER
$54.8B
| $5.78M | ﹤0.01% |
51,200
+12,200
| +31% | +$1.27M |
|
1506
PUT
United States Natural Gas Fund
UNG
$470M
| $5.75M | ﹤0.01% |
394,600
+215,000
| +120% | +$3.92M |
|
1507
PUT
Groupon
GRPN
$980M
| $5.75M | ﹤0.01% |
430,800
+354,900
| +468% | +$5.41M |
|
1508
CALL
Goodyear
GT
$2.07B
| $5.74M | ﹤0.01% |
418,100
-21,200
| -5% | -$277K |
|
1509
NIO
NIO
$11.3B
| $5.73M | ﹤0.01% |
1,273,984
+584,992
| +85% | +$3.53M |
|
1510
CALL
Howmet Aerospace
HWM
$116B
| $5.71M | ﹤0.01% |
83,500
+49,500
| +146% | +$3.03M |
|
1511
CALL
Amplify Online Retail ETF
IBUY
$106M
| $5.71M | ﹤0.01% |
370,000
+320,700
| +651% | +$17.2M |
|
1512
PUT
Eversource Energy
ES
$28.2B
| $5.7M | ﹤0.01% |
95,400
-51,500
| -35% | -$2.96M |
|
1513
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $5.69M | ﹤0.01% |
52,800
+22,300
| +73% | +$2.01M |
|
1514
CALL
ResMed
RMD
$28.3B
| $5.68M | ﹤0.01% |
28,700
+2,700
| +10% | +$495K |
|
1515
ArcBest
ARCB
$3.44B
| $5.65M | ﹤0.01% |
39,657
+37,854
| +2,100% | +$4.96M |
|
|
WIRE
1516
CALL
DELISTED
Encore Wire Corp
WIRE
| $5.65M | ﹤0.01% |
21,500
| – | – |
|
1517
PUT
Itaú Unibanco
ITUB
$91.3B
| $5.64M | ﹤0.01% |
922,149
+168,477
| +22% | +$1.01M |
|
1518
PUT
Global Payments
GPN
$22.1B
| $5.61M | ﹤0.01% |
42,000
-48,900
| -54% | -$6.47M |
|
1519
ProShares UltraShort Bloomberg Natural Gas
KOLD
$110M
| $5.61M | ﹤0.01% |
71,582
+190
| +0.3% | +$11.6K |
|
1520
iShares MSCI EAFE ETF
EFA
$76.4B
| $5.6M | ﹤0.01% |
70,145
-73,222
| -51% | -$5.6M |
|
1521
CALL
Winnebago Industries
WGO
$870M
| $5.6M | ﹤0.01% |
75,700
+38,800
| +105% | +$2.64M |
|
1522
CALL
Rambus
RMBS
$10.4B
| $5.6M | ﹤0.01% |
90,600
+500
| +0.6% | +$31.6K |
|
1523
CALL
2x Long VIX Futures ETF
UVIX
$286M
| $5.59M | ﹤0.01% |
2,173
+201
| +10% | +$448K |
|
1524
PUT
SiriusXM
SIRI
$10B
| $5.59M | ﹤0.01% |
143,980
-116,340
| -45% | -$5.53M |
|
1525
CALL
Hyatt Hotels
H
$17.6B
| $5.57M | ﹤0.01% |
34,900
+9,600
| +38% | +$1.35M |
|
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.