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 | |
|---|---|---|---|---|---|---|
|
OPTU
2801
CALL
Optimum Communications Inc
OPTU
$316M
| $1.15M | ﹤0.01% |
469,500
+464,200
| +8,758% | +$897K |
|
2802
iQIYI
IQ
$1.18B
| $1.15M | ﹤0.01% |
+403,372
| New | +$1.17M |
|
2803
Talos Energy
TALO
$2.49B
| $1.15M | ﹤0.01% |
+111,495
| New | +$1.27M |
|
|
OPTU
2804
PUT
Optimum Communications Inc
OPTU
$316M
| $1.15M | ﹤0.01% |
467,700
+429,700
| +1,131% | +$830K |
|
2805
CALL
Impinj
PI
$3.89B
| $1.15M | ﹤0.01% |
5,300
+700
| +15% | +$119K |
|
2806
PUT
Rithm Capital
RITM
$5.09B
| $1.15M | ﹤0.01% |
101,100
+66,500
| +192% | +$757K |
|
|
SRCL
2807
CALL
DELISTED
Stericycle Inc
SRCL
| $1.15M | ﹤0.01% |
18,800
-9,300
| -33% | -$552K |
|
2808
CALL
Asbury Automotive
ABG
$4.19B
| $1.15M | ﹤0.01% |
4,800
-7,500
| -61% | -$1.77M |
|
2809
Hewlett Packard
HPE
$63.2B
| $1.14M | ﹤0.01% |
55,930
-358,749
| -87% | -$6.86M |
|
|
TEM
2810
PUT
Tempus AI
TEM
$7.69B
| $1.14M | ﹤0.01% |
20,200
+14,500
| +254% | +$678K |
|
2811
PUT
Nano X Imaging
NNOX
$62.4M
| $1.14M | ﹤0.01% |
187,900
-11,800
| -6% | -$83.8K |
|
2812
CALL
Harrow
HROW
$1.43B
| $1.14M | ﹤0.01% |
25,400
+15,300
| +151% | +$517K |
|
2813
PUT
Dentsply Sirona
XRAY
$2.59B
| $1.14M | ﹤0.01% |
42,100
+41,800
| +13,933% | +$1.07M |
|
|
LSXMA
2814
CALL
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $1.14M | ﹤0.01% |
15,300
-163,900
| -91% | -$3.7M |
|
2815
NextNav
NN
$1.7B
| $1.13M | ﹤0.01% |
151,478
-84,522
| -36% | -$652K |
|
2816
Vicor
VICR
$9.62B
| $1.13M | ﹤0.01% |
+26,919
| New | +$1M |
|
2817
PUT
CBRE Group
CBRE
$40.8B
| $1.13M | ﹤0.01% |
9,100
-3,500
| -28% | -$382K |
|
2818
PUT
Banco Macro
BMA
$5.7B
| $1.13M | ﹤0.01% |
17,800
-3,400
| -16% | -$196K |
|
2819
CALL
Corcept Therapeutics
CORT
$10.2B
| $1.13M | ﹤0.01% |
24,400
-75,200
| -76% | -$2.67M |
|
|
LOGC
2820
CALL
DELISTED
ContextLogic
LOGC
| $1.13M | ﹤0.01% |
207,200
+800
| +0.4% | +$4.41K |
|
2821
PUT
Simpson Manufacturing
SSD
$7.98B
| $1.13M | ﹤0.01% |
5,900
+4,900
| +490% | +$880K |
|
2822
PUT
Reliance Steel & Aluminium
RS
$20.8B
| $1.13M | ﹤0.01% |
3,900
+600
| +18% | +$172K |
|
2823
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $1.12M | ﹤0.01% |
15,000
-32,900
| -69% | -$1.99M |
|
2824
PUT
Republic Services
RSG
$66.7B
| $1.12M | ﹤0.01% |
5,600
-3,800
| -40% | -$765K |
|
2825
Allegiant Air
ALGT
$2.64B
| $1.12M | ﹤0.01% |
20,397
+18,105
| +790% | +$816K |
|
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.