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 | Miscellaneous | 98.49% |
| 2 | Technology | 0.4% |
| 3 | Consumer Discretionary | 0.29% |
| 4 | Healthcare | 0.15% |
| 5 | Industrials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1701
CALL
Urban Outfitters
URBN
$6.84B
| $3.83M | ﹤0.01% |
100,100
+66,800
| +201% | +$2.71M |
|
1702
CALL
Academy Sports + Outdoors
ASO
$2.78B
| $3.83M | ﹤0.01% |
65,600
+24,800
| +61% | +$1.35M |
|
1703
Norwegian Cruise Line
NCLH
$7.12B
| $3.82M | ﹤0.01% |
186,120
+6,932
| +4% | +$126K |
|
|
NKLA
1704
CALL
DELISTED
Nikola Corporation Common Stock
NKLA
| $3.82M | ﹤0.01% |
833,600
+83,100
| +11% | +$615K |
|
|
JWN
1705
CALL
DELISTED
Nordstrom
JWN
| $3.81M | ﹤0.01% |
169,600
-45,300
| -21% | -$1.01M |
|
1706
CALL
Honda
HMC
$40.5B
| $3.81M | ﹤0.01% |
120,200
+111,500
| +1,282% | +$3.54M |
|
1707
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.31B
| $3.8M | ﹤0.01% |
85,096
+55,606
| +189% | +$2.34M |
|
1708
PUT
iShares Convertible Bond ETF
ICVT
$7.96B
| $3.8M | ﹤0.01% |
113,600
-7,500
| -6% | -$602K |
|
|
MAG
1709
CALL
DELISTED
MAG Silver
MAG
| $3.8M | ﹤0.01% |
270,400
+70,700
| +35% | +$932K |
|
1710
CALL
American Superconductor
AMSC
$1.48B
| $3.79M | ﹤0.01% |
160,600
+33,200
| +26% | +$765K |
|
|
FL
1711
DELISTED
Foot Locker
FL
| $3.79M | ﹤0.01% |
146,694
-74,308
| -34% | -$2.05M |
|
1712
CALL
Entegris
ENTG
$21.7B
| $3.77M | ﹤0.01% |
33,500
-35,700
| -52% | -$4.23M |
|
1713
PUT
BRC Group Holdings
RILY
$281M
| $3.75M | ﹤0.01% |
715,300
+435,700
| +156% | +$4.83M |
|
1714
XPeng
XPEV
$10.4B
| $3.75M | ﹤0.01% |
307,981
+18,043
| +6% | +$150K |
|
1715
Elanco Animal Health
ELAN
$12B
| $3.75M | ﹤0.01% |
+255,342
| New | +$3.56M |
|
1716
PUT
Mid-America Apartment Communities
MAA
$14.9B
| $3.75M | ﹤0.01% |
23,600
-900
| -4% | -$137K |
|
1717
PUT
Tilray
TLRY
$603M
| $3.74M | ﹤0.01% |
212,660
+36,960
| +21% | +$665K |
|
1718
Roku
ROKU
$23B
| $3.74M | ﹤0.01% |
50,046
-120,041
| -71% | -$7.69M |
|
1719
CALL
Itaú Unibanco
ITUB
$92.7B
| $3.73M | ﹤0.01% |
635,726
+326,077
| +105% | +$1.84M |
|
|
BCPC
1720
CALL
Balchem Corp
BCPC
$5.45B
| $3.73M | ﹤0.01% |
21,200
+15,900
| +300% | +$2.71M |
|
1721
CALL
Pagaya Technologies
PGY
$1.87B
| $3.72M | ﹤0.01% |
352,400
+133,700
| +61% | +$1.76M |
|
1722
PUT
TAL Education Group
TAL
$6.6B
| $3.72M | ﹤0.01% |
314,300
+85,900
| +38% | +$791K |
|
1723
PUT
Plains All American Pipeline
PAA
$18.2B
| $3.72M | ﹤0.01% |
214,000
+87,700
| +69% | +$1.57M |
|
1724
PUT
Bloom Energy
BE
$81.5B
| $3.72M | ﹤0.01% |
351,900
+180,600
| +105% | +$2.14M |
|
1725
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$47.7M
| $3.71M | ﹤0.01% |
201,800
+23,800
| +13% | +$456K |
|
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 Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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.