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 | |
|---|---|---|---|---|---|---|
4926
CALL
Rigetti Computing
RGTI
$4.94B
| $118K | ﹤0.01% |
88,900
+51,400
| +137% | +$98.6K |
|
|
HIBB
4927
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $118K | ﹤0.01% |
2,500
-700
| -22% | -$29.8K |
|
|
CCC
4928
CALL
CCC Intelligent Solutions
CCC
$3.56B
| $117K | ﹤0.01% |
8,800
+4,700
| +115% | +$51.6K |
|
4929
CALL
Dana Inc
DAN
$2.91B
| $117K | ﹤0.01% |
8,000
+5,300
| +196% | +$88.4K |
|
|
GOGL
4930
CALL
DELISTED
Golden Ocean Group
GOGL
| $117K | ﹤0.01% |
14,900
-400
| -3% | -$3K |
|
|
HOUS
4931
PUT
DELISTED
Anywhere Real Estate
HOUS
| $117K | ﹤0.01% |
18,200
+18,000
| +9,000% | +$131K |
|
4932
Maravai LifeSciences
MRVI
$996M
| $117K | ﹤0.01% |
11,770
-138,580
| -92% | -$1.52M |
|
4933
CALL
SunCoke Energy
SXC
$717M
| $117K | ﹤0.01% |
11,600
+8,700
| +300% | +$78.7K |
|
4934
CALL
Coeur Mining
CDE
$15.9B
| $116K | ﹤0.01% |
52,500
+4,500
| +9% | +$11.7K |
|
|
CVAC
4935
PUT
DELISTED
CureVac
CVAC
| $116K | ﹤0.01% |
17,100
+11,300
| +195% | +$99.8K |
|
4936
Evolus
EOLS
$396M
| $116K | ﹤0.01% |
12,775
-4,634
| -27% | -$41.6K |
|
|
MCHB
4937
Mechanics Bancorp
MCHB
$3.68B
| $116K | ﹤0.01% |
+14,939
| New | +$133K |
|
4938
N-able
NABL
$821M
| $116K | ﹤0.01% |
9,025
+1,485
| +20% | +$20.2K |
|
4939
PUT
Allegiant Air
ALGT
$2.66B
| $115K | ﹤0.01% |
1,500
-92,000
| -98% | -$9.45M |
|
4940
PUT
First Financial Bankshares
FFIN
$5B
| $115K | ﹤0.01% |
4,600
-1,300
| -22% | -$37.7K |
|
4941
PUT
FNB Corp
FNB
$6.76B
| $115K | ﹤0.01% |
10,700
-2,300
| -18% | -$27.1K |
|
4942
CALL
Lifestance Health
LFST
$4.1B
| $115K | ﹤0.01% |
16,800
-300
| -2% | -$2.43K |
|
4943
PUT
Sypris Solutions
SYPR
$44.2M
| $115K | ﹤0.01% |
60,500
-52,300
| -46% | -$103K |
|
|
LOGC
4944
DELISTED
ContextLogic
LOGC
| $115K | ﹤0.01% |
26,294
+26,290
| +657,250% | +$164K |
|
|
SOVO
4945
PUT
DELISTED
Sovos Brands, Inc. Common Stock
SOVO
| $115K | ﹤0.01% |
+5,100
| New | +$107K |
|
4946
CALL
Alignment Healthcare
ALHC
$3.85B
| $114K | ﹤0.01% |
16,500
-100
| -0.6% | -$603 |
|
|
EFOR
4947
PUT
Everforth Inc
EFOR
$1.13B
| $114K | ﹤0.01% |
1,400
-1,800
| -56% | -$143K |
|
|
BPT
4948
CALL
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $114K | ﹤0.01% |
16,000
+4,700
| +42% | +$29.8K |
|
4949
Cooper-Standard Automotive
CPS
$514M
| $114K | ﹤0.01% |
8,551
-39
| -0.5% | -$618 |
|
4950
CALL
Cue Biopharma
CUE
$128M
| $114K | ﹤0.01% |
1,657
-2,513
| -60% | -$245K |
|
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.