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 | |
|---|---|---|---|---|---|---|
5051
Arch Capital
ACGL
$34.4B
| $119K | ﹤0.01% |
1,066
+450
| +73% | +$46.8K |
|
5052
CALL
Assurant
AIZ
$14B
| $119K | ﹤0.01% |
600
-1,700
| -74% | -$310K |
|
|
BCYC
5053
CALL
Bicycle Therapeutics
BCYC
$272M
| $119K | ﹤0.01% |
5,300
-100
| -2% | -$2.31K |
|
5054
PUT
BWX Technologies
BWXT
$15.4B
| $119K | ﹤0.01% |
1,100
-3,600
| -77% | -$358K |
|
5055
PUT
Gerdau
GGB
$9.64B
| $119K | ﹤0.01% |
34,000
-3,800
| -10% | -$12.4K |
|
|
TMHC
5056
CALL
DELISTED
Taylor Morrison
TMHC
| $119K | ﹤0.01% |
1,700
+1,400
| +467% | +$89.7K |
|
5057
CALL
Travel + Leisure Co
TNL
$4.61B
| $119K | ﹤0.01% |
2,600
-24,800
| -91% | -$1.1M |
|
5058
CALL
Xometry
XMTR
$4.72B
| $119K | ﹤0.01% |
6,500
+4,100
| +171% | +$67.3K |
|
5059
PUT
Armstrong World Industries
AWI
$7.36B
| $118K | ﹤0.01% |
900
| – | – |
|
5060
CALL
Eastern Bankshares
EBC
$5.25B
| $118K | ﹤0.01% |
7,200
+6,900
| +2,300% | +$109K |
|
|
OTLY
5061
Oatly Group
OTLY
$451M
| $118K | ﹤0.01% |
6,928
+3,255
| +89% | +$61.1K |
|
5062
Sally Beauty Holdings
SBH
$1.45B
| $118K | ﹤0.01% |
+8,732
| New | +$104K |
|
|
GRAL
5063
CALL
GRAIL Inc
GRAL
$2.97B
| $118K | ﹤0.01% |
+8,600
| New | +$130K |
|
|
AMPS
5064
CALL
DELISTED
Altus Power
AMPS
| $118K | ﹤0.01% |
37,400
-31,100
| -45% | -$111K |
|
|
ENLC
5065
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $118K | ﹤0.01% |
+8,186
| New | +$113K |
|
|
AZUL
5066
PUT
DELISTED
Azul
AZUL
| $117K | ﹤0.01% |
34,300
+16,900
| +97% | +$63.5K |
|
5067
Methanex
MEOH
$4.26B
| $117K | ﹤0.01% |
2,847
-553
| -16% | -$24.7K |
|
5068
PUT
Spire Global
SPIR
$444M
| $117K | ﹤0.01% |
11,800
-6,700
| -36% | -$69.9K |
|
|
STKL
5069
PUT
DELISTED
SunOpta
STKL
| $117K | ﹤0.01% |
18,400
-132,400
| -88% | -$776K |
|
5070
CALL
XPEL
XPEL
$1.2B
| $117K | ﹤0.01% |
2,700
+1,800
| +200% | +$72.6K |
|
|
ZIMV
5071
DELISTED
ZimVie
ZIMV
| $117K | ﹤0.01% |
+7,384
| New | +$133K |
|
|
ARC
5072
DELISTED
ARC Document Solutions, Inc.
ARC
| $117K | ﹤0.01% |
+34,626
| New | +$108K |
|
5073
PUT
Fortrea Holdings
FTRE
$1.79B
| $116K | ﹤0.01% |
5,800
-4,800
| -45% | -$113K |
|
|
ONTF
5074
CALL
DELISTED
ON24
ONTF
| $116K | ﹤0.01% |
19,000
+17,000
| +850% | +$105K |
|
|
PEO
5075
CALL
Adams Natural Resources Fund
PEO
$736M
| $116K | ﹤0.01% |
5,197
+5,093
| +4,897% | +$114K |
|
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.