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 | |
|---|---|---|---|---|---|---|
1001
PUT
Whirlpool
WHR
$2.31B
| $12.3M | 0.01% |
102,700
+24,100
| +31% | +$2.69M |
|
1002
PUT
Trip.com Group
TCOM
$27.1B
| $12.2M | 0.01% |
277,600
+130,400
| +89% | +$5.3M |
|
1003
PUT
SL Green Realty
SLG
$3.81B
| $12.2M | 0.01% |
220,700
-126,100
| -36% | -$5.97M |
|
1004
Vale
VALE
$63.1B
| $12.2M | 0.01% |
997,615
+434,288
| +77% | +$5.86M |
|
1005
CALL
ProShares UltraShort Health Care
RXD
$3.3M
| $12.1M | 0.01% |
502,800
-64,200
| -11% | -$1.4M |
|
1006
PUT
Lithia Motors
LAD
$7.62B
| $12.1M | 0.01% |
40,300
-9,700
| -19% | -$2.87M |
|
1007
PUT
W.W. Grainger
GWW
$64.6B
| $12.1M | 0.01% |
11,900
+6,300
| +113% | +$5.87M |
|
1008
PUT
TripAdvisor
TRIP
$1.57B
| $12.1M | 0.01% |
435,200
+258,300
| +146% | +$6.27M |
|
1009
PUT
Paycom
PAYC
$6.47B
| $12.1M | 0.01% |
60,700
-68,500
| -53% | -$13.1M |
|
|
PARA
1010
CALL
DELISTED
Paramount Global Class B
PARA
| $12.1M | 0.01% |
1,024,200
-359,600
| -26% | -$4.52M |
|
1011
Adobe
ADBE
$84.3B
| $12M | 0.01% |
+23,854
| New | +$13.7M |
|
1012
PUT
Fox Class B
FOX
$20.7B
| $12M | 0.01% |
384,500
+348,700
| +974% | +$9.75M |
|
1013
PUT
Aptiv
APTV
$11.9B
| $12M | 0.01% |
150,700
+50,700
| +51% | +$4.09M |
|
1014
PUT
HubSpot
HUBS
$9.73B
| $12M | 0.01% |
19,100
-29,900
| -61% | -$18M |
|
1015
CALL
Harley-Davidson
HOG
$2.79B
| $12M | 0.01% |
273,500
+83,400
| +44% | +$3.08M |
|
1016
CALL
Ball Corp
BALL
$16.6B
| $11.9M | 0.01% |
177,300
+59,100
| +50% | +$3.59M |
|
1017
CALL
The Mosaic Company
MOS
$7.08B
| $11.9M | 0.01% |
367,500
-206,300
| -36% | -$6.57M |
|
1018
CALL
Toll Brothers
TOL
$13.7B
| $11.9M | 0.01% |
92,200
+14,900
| +19% | +$1.62M |
|
1019
Hilton Worldwide
HLT
$72.9B
| $11.9M | 0.01% |
55,856
+23,223
| +71% | +$4.57M |
|
1020
PUT
Transocean
RIG
$5.89B
| $11.9M | 0.01% |
1,896,700
+227,800
| +14% | +$1.24M |
|
1021
CALL
Illumina
ILMN
$29.8B
| $11.9M | 0.01% |
89,128
-46,362
| -34% | -$6.21M |
|
1022
PUT
Post Holdings
POST
$4.09B
| $11.9M | 0.01% |
111,800
+103,100
| +1,185% | +$10.3M |
|
|
DFS
1023
CALL
DELISTED
Discover Financial Services
DFS
| $11.8M | 0.01% |
90,300
-89,500
| -50% | -$10.3M |
|
1024
CALL
Norfolk Southern
NSC
$78.3B
| $11.8M | 0.01% |
46,400
-20,800
| -31% | -$5.15M |
|
1025
CALL
PBF Energy
PBF
$7.33B
| $11.8M | 0.01% |
205,100
-150,700
| -42% | -$7.38M |
|
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.