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 | |
|---|---|---|---|---|---|---|
5701
PUT
Gibraltar Industries
ROCK
$1.25B
| $62K | ﹤0.01% |
900
+400
| +80% | +$27.9K |
|
5702
CALL
Suzano
SUZ
$10.5B
| $62K | ﹤0.01% |
6,200
+6,000
| +3,000% | +$58.6K |
|
|
THS
5703
CALL
DELISTED
Treehouse Foods
THS
| $62K | ﹤0.01% |
1,500
-500
| -25% | -$19.8K |
|
|
VPU
5704
Vanguard Utilities ETF
VPU
$8.46B
| $62K | ﹤0.01% |
+360
| New | +$57.9K |
|
5705
PUT
Corpay
CPAY
$25B
| $62K | ﹤0.01% |
200
| – | – |
|
|
BIG
5706
PUT
DELISTED
Big Lots, Inc.
BIG
| $62K | ﹤0.01% |
545,300
-62,400
| -10% | -$65.2K |
|
5707
CALL
AC Immune
ACIU
$223M
| $61K | ﹤0.01% |
16,300
-63,200
| -79% | -$221K |
|
5708
Bruker
BRKR
$9.57B
| $61K | ﹤0.01% |
891
+418
| +88% | +$27K |
|
5709
Cognex
CGNX
$10.9B
| $61K | ﹤0.01% |
1,527
-2,152
| -58% | -$91.7K |
|
5710
PUT
Dana Inc
DAN
$2.9B
| $61K | ﹤0.01% |
5,800
-1,600
| -22% | -$17.6K |
|
5711
PUT
Encore Capital Group
ECPG
$2.02B
| $61K | ﹤0.01% |
1,300
-1,100
| -46% | -$52.2K |
|
5712
PUT
EnerSys
ENS
$6.78B
| $61K | ﹤0.01% |
+600
| New | +$60.5K |
|
5713
Ezcorp Inc
EZPW
$1.83B
| $61K | ﹤0.01% |
+5,449
| New | +$59.5K |
|
|
KYNB
5714
CALL
Kyntra Bio
KYNB
$27.2M
| $61K | ﹤0.01% |
6,120
+3,500
| +134% | +$52.8K |
|
|
HITI
5715
PUT
High Tide
HITI
$186M
| $61K | ﹤0.01% |
30,100
+13,800
| +85% | +$27.3K |
|
5716
CALL
Meritage Homes
MTH
$4.58B
| $61K | ﹤0.01% |
600
-1,600
| -73% | -$151K |
|
5717
Runway Growth Finance
RWAY
$232M
| $61K | ﹤0.01% |
+5,949
| New | +$65.3K |
|
5718
CALL
Boston Omaha
BOC
$428M
| $60K | ﹤0.01% |
4,100
+2,400
| +141% | +$33.4K |
|
|
CGAU
5719
PUT
Centerra Gold
CGAU
$3.36B
| $60K | ﹤0.01% |
8,400
+6,100
| +265% | +$41.9K |
|
5720
VictoryShares US Small Cap High Div Volatility Wtd ETF
CSB
$269M
| $60K | ﹤0.01% |
+1,029
| New | +$58.6K |
|
5721
CALL
Dakota Gold
DC
$608M
| $60K | ﹤0.01% |
25,700
-15,700
| -38% | -$35.9K |
|
5722
PUT
Hycroft Mining Holding Corp
HYMC
$1.82B
| $60K | ﹤0.01% |
24,000
+7,400
| +45% | +$17.9K |
|
5723
Immunic
IMUX
$190M
| $60K | ﹤0.01% |
3,651
-68
| -2% | -$968 |
|
5724
iShares S&P India Nifty 50 Index Fund
INDY
$562M
| $60K | ﹤0.01% |
1,076
-1,472
| -58% | -$80.5K |
|
5725
CALL
Kura Oncology
KURA
$800M
| $60K | ﹤0.01% |
3,100
+300
| +11% | +$6.08K |
|
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.