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 | |
|---|---|---|---|---|---|---|
2251
CALL
Bank of Hawaii
BOH
$3.33B
| $1.63M | ﹤0.01% |
32,800
-100
| -0.3% | -$5.14K |
|
2252
PUT
DHT Holdings
DHT
$2.97B
| $1.63M | ﹤0.01% |
158,100
+131,300
| +490% | +$1.23M |
|
2253
Ambarella
AMBA
$2.99B
| $1.63M | ﹤0.01% |
+30,690
| New | +$2.16M |
|
2254
PUT
Yum China
YUMC
$14.9B
| $1.63M | ﹤0.01% |
29,200
-8,900
| -23% | -$498K |
|
2255
Garrett Motion
GTX
$5.9B
| $1.63M | ﹤0.01% |
206,437
+22,679
| +12% | +$175K |
|
|
AKRO
2256
CALL
DELISTED
Akero Therapeutics
AKRO
| $1.62M | ﹤0.01% |
32,100
+25,900
| +418% | +$1.21M |
|
2257
Capri Holdings
CPRI
$1.77B
| $1.62M | ﹤0.01% |
30,845
-70,496
| -70% | -$3.2M |
|
2258
PUT
LGI Homes
LGIH
$1.4B
| $1.62M | ﹤0.01% |
16,300
+3,900
| +31% | +$484K |
|
2259
CALL
Madison Square Garden
MSGS
$9.54B
| $1.62M | ﹤0.01% |
9,200
+4,600
| +100% | +$866K |
|
|
BINI
2260
CALL
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
2261
CALL
Xerox
XRX
$337M
| $1.62M | ﹤0.01% |
103,300
+75,000
| +265% | +$1.18M |
|
2262
PUT
GXO Logistics
GXO
$6.06B
| $1.62M | ﹤0.01% |
27,600
+20,500
| +289% | +$1.28M |
|
2263
PUT
Syndax Pharmaceuticals
SNDX
$1.84B
| $1.62M | ﹤0.01% |
+111,300
| New | +$2.11M |
|
2264
PUT
Nutanix
NTNX
$14.9B
| $1.61M | ﹤0.01% |
46,300
-5,600
| -11% | -$176K |
|
2265
CALL
Trupanion
TRUP
$1.05B
| $1.61M | ﹤0.01% |
57,200
-84,800
| -60% | -$2.41M |
|
2266
PUT
Impinj
PI
$3.89B
| $1.61M | ﹤0.01% |
29,300
-4,800
| -14% | -$326K |
|
2267
SAP
SAP
$187B
| $1.61M | ﹤0.01% |
+12,469
| New | +$1.7M |
|
2268
CALL
Ametek
AME
$55.5B
| $1.61M | ﹤0.01% |
10,900
+9,300
| +581% | +$1.45M |
|
2269
DoubleVerify
DV
$1.62B
| $1.61M | ﹤0.01% |
+57,586
| New | +$1.97M |
|
2270
KBR
KBR
$4.68B
| $1.61M | ﹤0.01% |
27,287
+13,773
| +102% | +$849K |
|
|
SNCY
2271
DELISTED
Sun Country Airlines
SNCY
| $1.6M | ﹤0.01% |
108,092
+104,084
| +2,597% | +$1.84M |
|
2272
CALL
Nordic American Tanker
NAT
$1.37B
| $1.6M | ﹤0.01% |
388,000
+194,200
| +100% | +$776K |
|
2273
PUT
Organon & Co
OGN
$3.55B
| $1.6M | ﹤0.01% |
92,100
+57,900
| +169% | +$1.21M |
|
2274
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.22B
| $1.6M | ﹤0.01% |
33,162
-7,658
| -19% | -$486K |
|
2275
CALL
WEX
WEX
$6.11B
| $1.6M | ﹤0.01% |
8,500
+3,600
| +73% | +$695K |
|
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.