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 | |
|---|---|---|---|---|---|---|
6101
CALL
Chegg
CHGG
$118M
| $39K | ﹤0.01% |
22,400
+4,000
| +22% | +$9.8K |
|
6102
PUT
H.B. Fuller
FUL
$2.98B
| $39K | ﹤0.01% |
500
+300
| +150% | +$24.4K |
|
6103
Fidelity MSCI Utilities Index ETF
FUTY
$2.33B
| $39K | ﹤0.01% |
+761
| New | +$36.4K |
|
6104
CALL
GeoPark
GPRK
$622M
| $39K | ﹤0.01% |
+5,000
| New | +$45.8K |
|
6105
Gran Tierra Energy
GTE
$237M
| $39K | ﹤0.01% |
+6,271
| New | +$50.3K |
|
6106
PUT
IES Holdings
IESC
$11.4B
| $39K | ﹤0.01% |
200
-200
| -50% | -$32.4K |
|
|
LAND
6107
Gladstone Land Corp
LAND
$357M
| $39K | ﹤0.01% |
+2,825
| New | +$39.8K |
|
6108
Alliant Energy
LNT
$18.3B
| $39K | ﹤0.01% |
657
-3,358
| -84% | -$191K |
|
6109
PUT
NBT Bancorp
NBTB
$2.75B
| $39K | ﹤0.01% |
900
+300
| +50% | +$13.5K |
|
6110
CALL
Otter Tail
OTTR
$3.75B
| $39K | ﹤0.01% |
500
+100
| +25% | +$8.65K |
|
6111
CALL
Spok Holdings
SPOK
$225M
| $39K | ﹤0.01% |
2,600
-1,300
| -33% | -$19.8K |
|
|
SVC
6112
Service Properties Trust
SVC
$1.04B
| $39K | ﹤0.01% |
1,715
-1,452
| -46% | -$36.1K |
|
|
UMH
6113
PUT
UMH Properties
UMH
$1.3B
| $39K | ﹤0.01% |
2,000
+200
| +11% | +$3.72K |
|
|
PRSU
6114
CALL
Pursuit Attractions and Hospitality Inc
PRSU
$1.4B
| $39K | ﹤0.01% |
+1,100
| New | +$37.4K |
|
|
AKYA
6115
CALL
DELISTED
Akoya BioSciences
AKYA
| $38K | ﹤0.01% |
14,100
+7,100
| +101% | +$17.3K |
|
6116
Sphere 3D
ANY
$18M
| $38K | ﹤0.01% |
+4,242
| New | +$40.4K |
|
6117
CALL
Astronics
ATRO
$3.38B
| $38K | ﹤0.01% |
2,400
| – | – |
|
6118
Anavex Life Sciences
AVXL
$250M
| $38K | ﹤0.01% |
+6,756
| New | +$39K |
|
|
CRESY
6119
Cresud
CRESY
$823M
| $38K | ﹤0.01% |
4,495
-1,087
| -19% | -$8.78K |
|
6120
CVB Financial
CVBF
$4B
| $38K | ﹤0.01% |
+2,155
| New | +$38.4K |
|
6121
PUT
Dolby
DLB
$4.9B
| $38K | ﹤0.01% |
+500
| New | +$37.2K |
|
|
DSL
6122
PUT
DoubleLine Income Solutions Fund
DSL
$1.23B
| $38K | ﹤0.01% |
3,000
+800
| +36% | +$10.2K |
|
6123
PUT
FIGS
FIGS
$1.75B
| $38K | ﹤0.01% |
5,700
+1,700
| +43% | +$9.91K |
|
6124
PUT
Gladstone Capital
GLAD
$426M
| $38K | ﹤0.01% |
1,600
+800
| +100% | +$18.6K |
|
6125
Hagerty
HGTY
$1.17B
| $38K | ﹤0.01% |
+3,793
| New | +$42K |
|
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.