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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3051
PUT
Carriage Services
CSV
$618M
| $866K | ﹤0.01% |
26,400
-3,700
| -12% | -$114K |
|
3052
CALL
Yelp
YELP
$1.38B
| $866K | ﹤0.01% |
24,700
+8,000
| +48% | +$279K |
|
3053
Energy Fuels
UUUU
$2.82B
| $865K | ﹤0.01% |
157,617
+108,955
| +224% | +$567K |
|
3054
CALL
Aviat Networks
AVNW
$262M
| $863K | ﹤0.01% |
39,900
-8,800
| -18% | -$235K |
|
3055
PUT
Schrodinger
SDGR
$1.12B
| $862K | ﹤0.01% |
46,500
-2,900
| -6% | -$59.6K |
|
3056
PUT
Martin Marietta Materials
MLM
$33.6B
| $861K | ﹤0.01% |
1,600
-100
| -6% | -$54.1K |
|
3057
Blue Owl Capital
OBDC
$5.35B
| $861K | ﹤0.01% |
+59,150
| New | +$888K |
|
|
ANSS
3058
PUT
DELISTED
Ansys
ANSS
| $860K | ﹤0.01% |
2,700
+800
| +42% | +$254K |
|
3059
PUT
Ambev
ABEV
$47.3B
| $859K | ﹤0.01% |
352,300
+307,500
| +686% | +$690K |
|
3060
PUT
Axcelis
ACLS
$4.12B
| $859K | ﹤0.01% |
8,200
-2,300
| -22% | -$269K |
|
3061
CALL
Nexstar Media Group
NXST
$5.6B
| $859K | ﹤0.01% |
5,200
-4,700
| -47% | -$795K |
|
3062
Helix Energy Solutions
HLX
$1.46B
| $858K | ﹤0.01% |
+77,387
| New | +$852K |
|
3063
CALL
Genius Sports
GENI
$1.73B
| $857K | ﹤0.01% |
109,400
+89,400
| +447% | +$621K |
|
3064
PUT
Ramaco Resources Class A
METC
$676M
| $857K | ﹤0.01% |
75,762
-33,282
| -31% | -$397K |
|
3065
PUT
CVR Energy
CVI
$3.36B
| $854K | ﹤0.01% |
37,100
+11,100
| +43% | +$274K |
|
3066
PUT
CRH
CRH
$66.7B
| $853K | ﹤0.01% |
9,200
+2,300
| +33% | +$193K |
|
3067
iShares MSCI Canada ETF
EWC
$6.04B
| $853K | ﹤0.01% |
+20,546
| New | +$805K |
|
3068
Uber
UBER
$134B
| $852K | ﹤0.01% |
+11,337
| New | +$798K |
|
|
AZEK
3069
CALL
DELISTED
The AZEK Co
AZEK
| $851K | ﹤0.01% |
18,200
-61,500
| -77% | -$2.64M |
|
3070
CALL
American Coastal Insurance
ACIC
$498M
| $849K | ﹤0.01% |
75,400
-19,900
| -21% | -$222K |
|
3071
CALL
EPR Properties
EPR
$4.86B
| $848K | ﹤0.01% |
17,300
-5,600
| -24% | -$256K |
|
3072
PUT
Goosehead Insurance
GSHD
$1.39B
| $848K | ﹤0.01% |
9,500
+9,300
| +4,650% | +$736K |
|
3073
CALL
TMC The Metals Company
TMC
$1.59B
| $848K | ﹤0.01% |
800,800
+424,000
| +113% | +$474K |
|
3074
PUT
Viper Energy
VNOM
$8.81B
| $848K | ﹤0.01% |
18,800
+5,600
| +42% | +$246K |
|
3075
CALL
Braze
BRZE
$2.45B
| $847K | ﹤0.01% |
26,200
-2,600
| -9% | -$103K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.