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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4026
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.7M
| $273K | ﹤0.01% |
18,200
+18,000
| +9,000% | +$356K |
|
4027
Klaviyo
KVYO
$5.72B
| $273K | ﹤0.01% |
+7,928
| New | +$272K |
|
4028
Westrock Coffee
WEST
$807M
| $273K | ﹤0.01% |
30,862
+30,861
| +3,086,100% | +$321K |
|
4029
PUT
W.R. Berkley
WRB
$28.2B
| $273K | ﹤0.01% |
6,450
-16,500
| -72% | -$684K |
|
4030
CALL
Xeris Biopharma Holdings
XERS
$1.44B
| $273K | ﹤0.01% |
146,800
+1,500
| +1% | +$3.44K |
|
4031
CALL
Blue Owl Capital
OWL
$6.53B
| $272K | ﹤0.01% |
21,000
-2,000
| -9% | -$23.9K |
|
4032
CALL
Globalstar
GSAT
$10.2B
| $271K | ﹤0.01% |
13,827
-6,073
| -31% | -$109K |
|
|
MOMO
4033
Hello Group
MOMO
$878M
| $271K | ﹤0.01% |
+38,881
| New | +$357K |
|
4034
Children's Place
PLCE
$56.5M
| $271K | ﹤0.01% |
+10,040
| New | +$272K |
|
4035
iShares Broad USD High Yield Corporate Bond ETF
USHY
$29.2B
| $271K | ﹤0.01% |
7,833
+1,461
| +23% | +$51.3K |
|
|
ONC
4036
BeOne Medicines Ltd
ONC
$34B
| $271K | ﹤0.01% |
1,509
+741
| +96% | +$147K |
|
|
DSKE
4037
DELISTED
Daseke, Inc. Common Stock
DSKE
| $271K | ﹤0.01% |
+52,870
| New | +$319K |
|
4038
CALL
Allegion
ALLE
$13.6B
| $270K | ﹤0.01% |
2,600
+800
| +44% | +$90.1K |
|
4039
CALL
Repligen
RGEN
$7.33B
| $270K | ﹤0.01% |
1,700
-4,000
| -70% | -$654K |
|
4040
BorgWarner
BWA
$13.1B
| $269K | ﹤0.01% |
+6,671
| New | +$283K |
|
|
4041
PUT
Globalstar
GSAT
$10.2B
| $269K | ﹤0.01% |
13,707
+6,854
| +100% | +$123K |
|
4042
Otis Worldwide
OTIS
$27.8B
| $269K | ﹤0.01% |
+3,350
| New | +$286K |
|
4043
PUT
TORM
TRMD
$3.07B
| $269K | ﹤0.01% |
9,800
-900
| -8% | -$22.9K |
|
4044
KE Holdings
BEKE
$17.8B
| $268K | ﹤0.01% |
+17,302
| New | +$275K |
|
4045
CALL
M/I Homes
MHO
$3.99B
| $268K | ﹤0.01% |
3,200
+2,700
| +540% | +$250K |
|
|
4046
PUT
M/I Homes
MHO
$3.99B
| $268K | ﹤0.01% |
3,200
+2,800
| +700% | +$259K |
|
4047
PUT
Middleby
MIDD
$6.02B
| $268K | ﹤0.01% |
2,100
-27,200
| -93% | -$3.86M |
|
|
SFIX
4048
PUT
Stitch Fix
SFIX
$567M
| $268K | ﹤0.01% |
77,800
+11,700
| +18% | +$46.8K |
|
4049
CALL
InfraCap MLP ETF
AMZA
$473M
| $267K | ﹤0.01% |
8,600
+1,100
| +15% | +$37.6K |
|
|
KNDI
4050
CALL
Kandi Technologies Group
KNDI
$62.1M
| $267K | ﹤0.01% |
77,400
-18,600
| -19% | -$65.4K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.