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 | |
|---|---|---|---|---|---|---|
1826
PUT
Olin
OLN
$2.64B
| $2.74M | ﹤0.01% |
54,800
+43,600
| +389% | +$2.35M |
|
|
AD
1827
CALL
Array Digital Infrastructure
AD
$3.02B
| $2.73M | ﹤0.01% |
+63,600
| New | +$2.06M |
|
1828
PUT
Kinder Morgan
KMI
$73.1B
| $2.72M | ﹤0.01% |
164,300
-33,900
| -17% | -$584K |
|
1829
Baxter International
BAX
$11.6B
| $2.7M | ﹤0.01% |
71,660
+2,312
| +3% | +$98.5K |
|
1830
PUT
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $2.7M | ﹤0.01% |
17,100
-13,600
| -44% | -$257K |
|
1831
CALL
Dave & Buster's
PLAY
$343M
| $2.7M | ﹤0.01% |
72,800
+25,800
| +55% | +$1.05M |
|
1832
PUT
Insulet
PODD
$11.3B
| $2.69M | ﹤0.01% |
16,900
+12,700
| +302% | +$2.84M |
|
|
TEN
1833
CALL
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $2.69M | ﹤0.01% |
129,700
+107,200
| +476% | +$2.12M |
|
1834
Camtek
CAMT
$6.9B
| $2.69M | ﹤0.01% |
43,168
-1,620
| -4% | -$80K |
|
1835
CALL
RB Global
RBA
$20.8B
| $2.69M | ﹤0.01% |
43,000
+26,800
| +165% | +$1.65M |
|
|
CPE
1836
PUT
DELISTED
Callon Petroleum Company
CPE
| $2.68M | ﹤0.01% |
68,500
-14,800
| -18% | -$547K |
|
1837
PUT
Icahn Enterprises
IEP
$5.17B
| $2.68M | ﹤0.01% |
135,300
-223,800
| -62% | -$5.65M |
|
1838
Williams-Sonoma
WSM
$26.7B
| $2.67M | ﹤0.01% |
+34,388
| New | +$2.37M |
|
1839
CALL
Charles River Laboratories
CRL
$10.9B
| $2.67M | ﹤0.01% |
13,600
+7,800
| +134% | +$1.6M |
|
1840
PUT
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $2.66M | ﹤0.01% |
26,600
+12,000
| +82% | +$730K |
|
1841
CALL
Planet Fitness
PLNT
$4.23B
| $2.66M | ﹤0.01% |
54,100
+44,600
| +469% | +$2.7M |
|
1842
PUT
Brookfield Infrastructure
BIPC
$5.11B
| $2.66M | ﹤0.01% |
75,200
+63,100
| +521% | +$2.61M |
|
1843
PUT
Toronto Dominion Bank
TD
$198B
| $2.66M | ﹤0.01% |
44,100
-11,800
| -21% | -$736K |
|
1844
PUT
Bio-Rad Laboratories Class A
BIO
$8.42B
| $2.65M | ﹤0.01% |
7,400
-30,200
| -80% | -$11.7M |
|
|
NUVL
1845
CALL
DELISTED
Nuvalent
NUVL
| $2.65M | ﹤0.01% |
57,700
+57,600
| +57,600% | +$2.56M |
|
1846
Sunrun
RUN
$2.37B
| $2.65M | ﹤0.01% |
211,155
+211,125
| +703,750% | +$3.47M |
|
|
TIGR
1847
CALL
UP Fintech Holding
TIGR
$845M
| $2.65M | ﹤0.01% |
518,100
+396,200
| +325% | +$1.6M |
|
1848
PUT
Revvity
RVTY
$12.3B
| $2.65M | ﹤0.01% |
23,900
+15,400
| +181% | +$1.81M |
|
|
LOGC
1849
CALL
DELISTED
ContextLogic
LOGC
| $2.65M | ﹤0.01% |
599,900
-85,900
| -13% | -$535K |
|
1850
PUT
Costamare
CMRE
$1.9B
| $2.63M | ﹤0.01% |
273,800
+154,600
| +130% | +$1.57M |
|
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.