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 | |
|---|---|---|---|---|---|---|
1651
Direxion Daily FTSE China Bull 3X ETF
YINN
$660M
| $4.69M | ﹤0.01% |
+245,623
| New | +$4.32M |
|
1652
CALL
Armstrong World Industries
AWI
$6.86B
| $4.68M | ﹤0.01% |
37,700
+37,600
| +37,600% | +$4.15M |
|
1653
CALL
Quest Diagnostics
DGX
$25.1B
| $4.67M | ﹤0.01% |
35,100
+7,800
| +29% | +$1.01M |
|
1654
CALL
PennyMac Financial
PFSI
$4.38B
| $4.66M | ﹤0.01% |
51,200
-4,900
| -9% | -$428K |
|
1655
CALL
Alaska Air
ALK
$5.15B
| $4.65M | ﹤0.01% |
108,200
-43,900
| -29% | -$1.64M |
|
1656
PUT
Essex Property Trust
ESS
$18.9B
| $4.65M | ﹤0.01% |
19,000
+16,100
| +555% | +$3.83M |
|
1657
CALL
Deutsche Bank
DB
$66.3B
| $4.65M | ﹤0.01% |
294,700
-205,000
| -41% | -$2.8M |
|
1658
PUT
TE Connectivity
TEL
$58.8B
| $4.65M | ﹤0.01% |
32,000
+22,000
| +220% | +$3.08M |
|
1659
PUT
Wheaton Precious Metals
WPM
$50.6B
| $4.64M | ﹤0.01% |
98,500
+11,900
| +14% | +$538K |
|
|
HOLX
1660
CALL
DELISTED
Hologic
HOLX
| $4.64M | ﹤0.01% |
59,500
+33,300
| +127% | +$2.48M |
|
1661
CALL
Emcor
EME
$33.1B
| $4.62M | ﹤0.01% |
13,200
+5,200
| +65% | +$1.4M |
|
1662
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $4.62M | ﹤0.01% |
87,900
-240,700
| -73% | -$9.75M |
|
1663
CALL
Barclays
BCS
$94.1B
| $4.62M | ﹤0.01% |
488,400
-76,500
| -14% | -$626K |
|
1664
Salesforce
CRM
$134B
| $4.59M | ﹤0.01% |
15,255
-138,432
| -90% | -$39.9M |
|
1665
CALL
Cognex
CGNX
$10.3B
| $4.59M | ﹤0.01% |
108,200
-8,700
| -7% | -$339K |
|
1666
CALL
Bank OZK
OZK
$5.49B
| $4.59M | ﹤0.01% |
100,900
+35,600
| +55% | +$1.59M |
|
1667
PUT
Radware
RDWR
$1.24B
| $4.58M | ﹤0.01% |
244,900
+130,600
| +114% | +$2.37M |
|
1668
CALL
Stanley Black & Decker
SWK
$14.2B
| $4.58M | ﹤0.01% |
46,800
-11,000
| -19% | -$1.01M |
|
1669
CALL
Penumbra
PEN
$12.5B
| $4.58M | ﹤0.01% |
20,500
-8,500
| -29% | -$2.1M |
|
1670
PUT
Guardant Health
GH
$19.5B
| $4.57M | ﹤0.01% |
221,700
+181,100
| +446% | +$3.88M |
|
1671
Citizens Financial Group
CFG
$30.4B
| $4.57M | ﹤0.01% |
125,924
+112,453
| +835% | +$3.69M |
|
1672
PUT
Campbell Soup
CPB
$6.51B
| $4.57M | ﹤0.01% |
102,700
+68,600
| +201% | +$2.97M |
|
1673
PUT
Trupanion
TRUP
$1.05B
| $4.55M | ﹤0.01% |
165,000
+34,800
| +27% | +$971K |
|
1674
PUT
UDR
UDR
$12.9B
| $4.55M | ﹤0.01% |
121,700
+121,300
| +30,325% | +$4.46M |
|
1675
Walmart Inc
WMT
$871B
| $4.55M | ﹤0.01% |
75,652
-467,831
| -86% | -$26.8M |
|
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.