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 | |
|---|---|---|---|---|---|---|
5776
CALL
Smartbird Inc
BIRD
$19.5M
| $51K | ﹤0.01% |
2,310
-3,165
| -58% | -$85.3K |
|
5777
CALL
Chemed
CHE
$7.07B
| $51K | ﹤0.01% |
+100
| New | +$52K |
|
|
5778
PUT
Chemed
CHE
$7.07B
| $51K | ﹤0.01% |
100
-100
| -50% | -$52K |
|
|
CSGS
5779
PUT
DELISTED
CSG Systems International
CSGS
| $51K | ﹤0.01% |
+1,000
| New | +$53.2K |
|
5780
Cue Biopharma
CUE
$113M
| $51K | ﹤0.01% |
+744
| New | +$72.6K |
|
5781
PUT
Exponent
EXPO
$3.24B
| $51K | ﹤0.01% |
+600
| New | +$54.3K |
|
|
LGO
5782
Largo
LGO
$59.8M
| $51K | ﹤0.01% |
18,234
+2,998
| +20% | +$11.3K |
|
5783
CALL
Nomad Foods
NOMD
$1.66B
| $51K | ﹤0.01% |
3,400
+2,200
| +183% | +$38.1K |
|
5784
CALL
Nerdy
NRDY
$106M
| $51K | ﹤0.01% |
13,800
-92,600
| -87% | -$401K |
|
5785
Portillo's
PTLO
$331M
| $51K | ﹤0.01% |
+3,363
| New | +$65.7K |
|
5786
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.34B
| $51K | ﹤0.01% |
1,305
+887
| +212% | +$36.6K |
|
5787
CALL
Sixth Street Specialty
TSLX
$1.63B
| $51K | ﹤0.01% |
2,500
-2,600
| -51% | -$51.9K |
|
5788
CALL
Townsquare Media
TSQ
$106M
| $51K | ﹤0.01% |
5,900
+5,800
| +5,800% | +$60.2K |
|
5789
PUT
Walker & Dunlop
WD
$1.71B
| $51K | ﹤0.01% |
+700
| New | +$59.2K |
|
|
HEP
5790
DELISTED
Holly Energy Partners, L.P.
HEP
| $51K | ﹤0.01% |
+2,356
| New | +$49.3K |
|
5791
American Financial Group
AFG
$11.8B
| $50K | ﹤0.01% |
+450
| New | +$51.9K |
|
|
AHT
5792
CALL
Ashford Hospitality Trust
AHT
$20.9M
| $50K | ﹤0.01% |
2,130
-2,820
| -57% | -$89.5K |
|
5793
CALL
Amphastar Pharmaceuticals
AMPH
$879M
| $50K | ﹤0.01% |
1,100
+700
| +175% | +$38.2K |
|
5794
Cognyte Software
CGNT
$659M
| $50K | ﹤0.01% |
10,566
-21,234
| -67% | -$108K |
|
5795
Copa Holdings
CPA
$5.76B
| $50K | ﹤0.01% |
565
-2,649
| -82% | -$275K |
|
5796
Dine Brands
DIN
$456M
| $50K | ﹤0.01% |
1,018
-1,221
| -55% | -$68.2K |
|
5797
PUT
Vaalco Energy
EGY
$570M
| $50K | ﹤0.01% |
11,400
-74,600
| -87% | -$324K |
|
5798
CALL
First Bancorp
FBNC
$2.6B
| $50K | ﹤0.01% |
+1,800
| New | +$55.2K |
|
5799
PUT
Gaming and Leisure Properties
GLPI
$12.7B
| $50K | ﹤0.01% |
1,100
-400
| -27% | -$19.1K |
|
5800
Kontoor Brands
KTB
$4.63B
| $50K | ﹤0.01% |
+1,151
| New | +$50.4K |
|
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.