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 | |
|---|---|---|---|---|---|---|
1076
CALL
Public Storage
PSA
$58.8B
| $7.54M | 0.01% |
28,600
+9,700
| +51% | +$2.72M |
|
1077
CALL
SAP
SAP
$171B
| $7.53M | 0.01% |
58,200
-4,500
| -7% | -$613K |
|
1078
CALL
Penumbra
PEN
$12.5B
| $7.5M | 0.01% |
31,000
+17,800
| +135% | +$4.94M |
|
1079
PUT
Travelers Companies
TRV
$78.5B
| $7.5M | 0.01% |
45,900
+32,600
| +245% | +$5.44M |
|
1080
SLB Ltd
SLB
$70.6B
| $7.48M | 0.01% |
+128,342
| New | +$7.44M |
|
1081
CALL
Realty Income
O
$60.4B
| $7.47M | 0.01% |
149,900
-7,400
| -5% | -$426K |
|
1082
CALL
Vornado Realty Trust
VNO
$7.34B
| $7.47M | 0.01% |
329,300
+240,800
| +272% | +$5.32M |
|
1083
CALL
Tilray
TLRY
$493M
| $7.45M | 0.01% |
311,910
+45,790
| +17% | +$1.08M |
|
1084
Agnico Eagle Mines
AEM
$72.3B
| $7.45M | 0.01% |
163,846
+14,810
| +10% | +$726K |
|
1085
PUT
BridgeBio Pharma
BBIO
$16.2B
| $7.44M | 0.01% |
282,300
+66,600
| +31% | +$1.89M |
|
1086
CALL
Tapestry
TPR
$28.1B
| $7.44M | 0.01% |
258,700
+61,600
| +31% | +$2.26M |
|
1087
PUT
Waters Corp
WAT
$37.5B
| $7.43M | 0.01% |
27,100
+15,700
| +138% | +$4.34M |
|
1088
PUT
Coty
COTY
$2.29B
| $7.42M | 0.01% |
676,900
+530,000
| +361% | +$6.25M |
|
1089
PUT
SiriusXM
SIRI
$10.1B
| $7.41M | 0.01% |
163,900
+16,460
| +11% | +$765K |
|
1090
PUT
NRG Energy
NRG
$30.2B
| $7.41M | 0.01% |
192,300
-120,900
| -39% | -$4.58M |
|
1091
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$246M
| $7.39M | 0.01% |
179,000
+97,500
| +120% | +$4.01M |
|
1092
CALL
Pan American Silver
PAAS
$18.6B
| $7.38M | 0.01% |
567,400
-40,200
| -7% | -$629K |
|
1093
PUT
Duke Energy
DUK
$101B
| $7.36M | 0.01% |
83,400
-23,800
| -22% | -$2.18M |
|
|
IRBT
1094
PUT
DELISTED
iRobot
IRBT
| $7.35M | 0.01% |
194,000
+155,100
| +399% | +$6.23M |
|
1095
PUT
Qorvo
QRVO
$7.65B
| $7.35M | 0.01% |
77,000
-2,500
| -3% | -$255K |
|
|
1096
Advanced Micro Devices
AMD
$880B
| $7.34M | 0.01% |
71,430
-167,485
| -70% | -$18.2M |
|
1097
PUT
Crown Castle
CCI
$32.6B
| $7.34M | 0.01% |
79,800
+42,300
| +113% | +$4.38M |
|
1098
CALL
KE Holdings
BEKE
$17B
| $7.34M | 0.01% |
472,800
+20,100
| +4% | +$319K |
|
1099
CALL
Ecolab
ECL
$74.1B
| $7.32M | 0.01% |
43,200
+34,800
| +414% | +$6.33M |
|
1100
CALL
First Citizens BancShares
FCNCA
$25.2B
| $7.31M | 0.01% |
5,300
-2,400
| -31% | -$3.3M |
|
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.