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 | |
|---|---|---|---|---|---|---|
|
BHR
6026
CALL
Braemar Hotels & Resorts
BHR
$160M
| $42K | ﹤0.01% |
+13,900
| New | +$43.7K |
|
6027
PUT
Chefs' Warehouse
CHEF
$4.58B
| $42K | ﹤0.01% |
1,000
+100
| +11% | +$4.04K |
|
6028
CALL
CMS Energy
CMS
$22.7B
| $42K | ﹤0.01% |
600
-300
| -33% | -$19.7K |
|
6029
Castor Maritime
CTRM
$18.9M
| $42K | ﹤0.01% |
10,138
+3,238
| +47% | +$15K |
|
6030
PUT
Clearway Energy Class C
CWEN
$4.94B
| $42K | ﹤0.01% |
1,400
-400
| -22% | -$11.1K |
|
|
DADA
6031
CALL
DELISTED
Dada Nexus
DADA
| $42K | ﹤0.01% |
22,500
-11,200
| -33% | -$14.7K |
|
6032
FingerMotion
FNGR
$14.5M
| $42K | ﹤0.01% |
19,516
+8,424
| +76% | +$17.4K |
|
6033
Gold Royalty Corp
GROY
$621M
| $42K | ﹤0.01% |
+31,039
| New | +$42.2K |
|
6034
Horizon Technology Finance
HRZN
$300M
| $42K | ﹤0.01% |
+3,999
| New | +$45.7K |
|
|
ILPT
6035
Industrial Logistics Properties Trust
ILPT
$565M
| $42K | ﹤0.01% |
8,897
+5,424
| +156% | +$25.5K |
|
6036
PUT
Immunome
IMNM
$2.61B
| $42K | ﹤0.01% |
2,900
-3,900
| -57% | -$55.4K |
|
6037
CALL
KRONOS Worldwide
KRO
$717M
| $42K | ﹤0.01% |
3,400
-1,700
| -33% | -$19.7K |
|
6038
CALL
Newegg Commerce
NEGG
$270M
| $42K | ﹤0.01% |
2,860
+1,220
| +74% | +$20.9K |
|
6039
CALL
Avita Medical
RCEL
$138M
| $42K | ﹤0.01% |
4,000
+3,800
| +1,900% | +$35.7K |
|
|
SNCY
6040
DELISTED
Sun Country Airlines
SNCY
| $42K | ﹤0.01% |
3,801
-13,800
| -78% | -$156K |
|
6041
PUT
Spok Holdings
SPOK
$225M
| $42K | ﹤0.01% |
2,800
-100
| -3% | -$1.52K |
|
6042
CALL
US Gold Corp
USAU
$223M
| $42K | ﹤0.01% |
7,300
+5,100
| +232% | +$28.6K |
|
6043
Utz Brands
UTZ
$1.25B
| $42K | ﹤0.01% |
+2,385
| New | +$39.6K |
|
6044
PUT
Vivani Medical
VANI
$112M
| $42K | ﹤0.01% |
36,400
+14,900
| +69% | +$18.6K |
|
6045
PUT
Yext
YEXT
$552M
| $42K | ﹤0.01% |
6,200
-28,000
| -82% | -$156K |
|
6046
YieldMax MSTR Option Income Strategy ETF
MSTY
$734M
| $42K | ﹤0.01% |
342
-1,940
| -85% | -$241K |
|
|
ODVWW
6047
PUT
DELISTED
Osisko Development Corp. Warrant
ODVWW
| $42K | ﹤0.01% |
19,900
| – | – |
|
6048
PUT
Adaptive Biotechnologies
ADPT
$3.85B
| $41K | ﹤0.01% |
8,100
-25,200
| -76% | -$110K |
|
6049
PUT
Atlas Lithium Corp
ATLX
$80.2M
| $41K | ﹤0.01% |
6,100
+5,900
| +2,950% | +$59.9K |
|
6050
CALL
Customers Bancorp
CUBI
$2.65B
| $41K | ﹤0.01% |
900
+700
| +350% | +$36.4K |
|
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.