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 | |
|---|---|---|---|---|---|---|
|
BPMC
2101
PUT
DELISTED
Blueprint Medicines
BPMC
| $1.94M | ﹤0.01% |
38,600
+5,100
| +15% | +$273K |
|
2102
Bath & Body Works
BBWI
$4.01B
| $1.94M | ﹤0.01% |
57,336
-8,124
| -12% | -$295K |
|
2103
Canadian Pacific Kansas City
CP
$82B
| $1.94M | ﹤0.01% |
+26,012
| New | +$2.06M |
|
2104
CALL
Kinross Gold
KGC
$28.5B
| $1.93M | ﹤0.01% |
424,200
-187,000
| -31% | -$917K |
|
2105
CALL
Alliance Resource Partners
ARLP
$3.18B
| $1.93M | ﹤0.01% |
85,800
-39,100
| -31% | -$780K |
|
2106
CALL
Unum
UNM
$13.8B
| $1.93M | ﹤0.01% |
39,300
+12,100
| +44% | +$592K |
|
2107
PUT
Leonardo DRS
DRS
$12.8B
| $1.93M | ﹤0.01% |
115,600
+23,100
| +25% | +$390K |
|
2108
CALL
Aehr Test Systems
AEHR
$2.48B
| $1.93M | ﹤0.01% |
42,200
-11,600
| -22% | -$538K |
|
2109
BlackLine
BL
$1.69B
| $1.93M | ﹤0.01% |
34,772
+25,490
| +275% | +$1.4M |
|
2110
PUT
Galicia Financial Group
GGAL
$7.92B
| $1.93M | ﹤0.01% |
147,700
+108,200
| +274% | +$1.76M |
|
2111
CALL
Impinj
PI
$3.89B
| $1.93M | ﹤0.01% |
35,000
+23,900
| +215% | +$1.62M |
|
2112
PUT
Wyndham Hotels & Resorts
WH
$5.46B
| $1.93M | ﹤0.01% |
27,700
-63,700
| -70% | -$4.72M |
|
|
SPR
2113
CALL
DELISTED
Spirit AeroSystems
SPR
| $1.93M | ﹤0.01% |
119,300
-83,400
| -41% | -$1.92M |
|
2114
PUT
TransUnion
TRU
$14.8B
| $1.92M | ﹤0.01% |
26,800
-22,100
| -45% | -$1.73M |
|
2115
PUT
Maplebear
CART
$9.92B
| $1.92M | ﹤0.01% |
+64,700
| New | +$1.96M |
|
2116
PUT
PTC
PTC
$13.7B
| $1.91M | ﹤0.01% |
13,500
+7,600
| +129% | +$1.09M |
|
2117
CALL
Hecla Mining
HL
$10.2B
| $1.91M | ﹤0.01% |
489,000
-84,600
| -15% | -$405K |
|
2118
CALL
Erie Indemnity
ERIE
$11.7B
| $1.91M | ﹤0.01% |
6,500
+6,400
| +6,400% | +$1.66M |
|
2119
CALL
Comfort Systems
FIX
$61B
| $1.91M | ﹤0.01% |
11,200
+10,400
| +1,300% | +$1.82M |
|
2120
PUT
Penske Automotive Group
PAG
$14.3B
| $1.9M | ﹤0.01% |
11,400
+6,900
| +153% | +$1.15M |
|
|
DCH
2121
CALL
Dauch Corp
DCH
$1.3B
| $1.9M | ﹤0.01% |
261,600
+220,700
| +540% | +$1.77M |
|
2122
PUT
Arcus Biosciences
RCUS
$3.57B
| $1.9M | ﹤0.01% |
105,800
-39,800
| -27% | -$800K |
|
2123
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
| $1.9M | ﹤0.01% |
+76,014
| New | +$1.86M |
|
2124
CALL
Ionis Pharmaceuticals
IONS
$9.35B
| $1.9M | ﹤0.01% |
41,800
+26,600
| +175% | +$1.1M |
|
|
CHGX
2125
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $1.9M | ﹤0.01% |
48,100
-31,900
| -40% | -$989K |
|
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.