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 | |
|---|---|---|---|---|---|---|
5976
CALL
CubeSmart
CUBE
$9.39B
| $41K | ﹤0.01% |
1,100
-600
| -35% | -$25.3K |
|
5977
Comfort Systems
FIX
$60.9B
| $41K | ﹤0.01% |
244
-9
| -4% | -$1.58K |
|
5978
Geospace Technologies
GEOS
$94.6M
| $41K | ﹤0.01% |
+3,169
| New | +$29.9K |
|
5979
CALL
Gossamer Bio
GOSS
$82.9M
| $41K | ﹤0.01% |
339,700
+218,600
| +181% | +$252K |
|
5980
PUT
LiveWire
LVWR
$371M
| $41K | ﹤0.01% |
6,000
+4,000
| +200% | +$42.6K |
|
5981
CALL
Northwest Natural Holdings
NWN
$2.06B
| $41K | ﹤0.01% |
1,100
+200
| +22% | +$8.22K |
|
5982
PUT
Regenxbio
RGNX
$620M
| $41K | ﹤0.01% |
2,500
-2,800
| -53% | -$50.7K |
|
5983
PUT
Red Rock Resorts
RRR
$3.77B
| $41K | ﹤0.01% |
1,000
-1,100
| -52% | -$49.7K |
|
5984
CALL
Rackspace Technology
RXT
$1.05B
| $41K | ﹤0.01% |
17,600
-700
| -4% | -$1.59K |
|
|
FIRY
5985
Firy Inc
FIRY
$148M
| $41K | ﹤0.01% |
8,150
+4,471
| +122% | +$39.7K |
|
5986
PUT
Veru
VERU
$36M
| $41K | ﹤0.01% |
5,830
-19,800
| -77% | -$216K |
|
5987
PUT
Vir Biotechnology
VIR
$1.46B
| $41K | ﹤0.01% |
4,400
-91,900
| -95% | -$1.31M |
|
5988
PUT
VTEX
VTEX
$735M
| $41K | ﹤0.01% |
+8,200
| New | +$43.8K |
|
5989
Direxion Daily Consumer Discretionary Bull 3X ETF
WANT
$16.2M
| $41K | ﹤0.01% |
1,580
+789
| +100% | +$24.8K |
|
|
TWOU
5990
CALL
DELISTED
2U Inc
TWOU
| $41K | ﹤0.01% |
563
-247
| -30% | -$25.2K |
|
|
CTG
5991
CALL
DELISTED
Computer Task Group, Inc.
CTG
| $41K | ﹤0.01% |
4,000
+1,000
| +33% | +$9.21K |
|
|
CCV
5992
PUT
DELISTED
Churchill Capital Corp V
CCV
| $41K | ﹤0.01% |
+4,000
| New | +$41.2K |
|
5993
PUT
ABM Industries
ABM
$2.81B
| $40K | ﹤0.01% |
1,000
-1,200
| -55% | -$52K |
|
5994
CALL
Amneal Pharmaceuticals
AMRX
$5.85B
| $40K | ﹤0.01% |
+9,500
| New | +$35.4K |
|
5995
Arlo Technologies
ARLO
$1.6B
| $40K | ﹤0.01% |
3,932
-23,723
| -86% | -$252K |
|
|
KEEL
5996
Keel Infrastructure Corp
KEEL
$2.4B
| $40K | ﹤0.01% |
+37,737
| New | +$55.1K |
|
|
BRFS
5997
PUT
DELISTED
BRF SA
BRFS
| $40K | ﹤0.01% |
19,700
+9,900
| +101% | +$19.3K |
|
5998
Heartland Express
HTLD
$948M
| $40K | ﹤0.01% |
2,789
+1,894
| +212% | +$29.4K |
|
5999
CALL
Everspin Technologies
MRAM
$341M
| $40K | ﹤0.01% |
4,100
+1,000
| +32% | +$9.67K |
|
|
PLG
6000
PUT
Platinum Group Metals
PLG
$164M
| $40K | ﹤0.01% |
35,500
-1,600
| -4% | -$2.06K |
|
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.