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 | |
|---|---|---|---|---|---|---|
3076
Alkermes
ALKS
$8.79B
| $672K | ﹤0.01% |
+23,995
| New | +$703K |
|
3077
Group 1 Automotive
GPI
$4.01B
| $672K | ﹤0.01% |
+2,501
| New | +$655K |
|
3078
PUT
Alliance Resource Partners
ARLP
$3.3B
| $671K | ﹤0.01% |
29,800
-900
| -3% | -$17.9K |
|
3079
Camping World
CWH
$389M
| $671K | ﹤0.01% |
32,909
+26,802
| +439% | +$706K |
|
3080
CALL
Wendy's
WEN
$1.39B
| $671K | ﹤0.01% |
32,900
-9,300
| -22% | -$194K |
|
3081
Banco Macro
BMA
$5.89B
| $670K | ﹤0.01% |
33,963
-9,155
| -21% | -$223K |
|
3082
Haleon
HLN
$43.8B
| $669K | ﹤0.01% |
80,372
+21,097
| +36% | +$176K |
|
3083
PUT
Rocket Companies
RKT
$38.2B
| $669K | ﹤0.01% |
81,800
-53,500
| -40% | -$541K |
|
3084
PUT
CleanSpark
CLSK
$3.6B
| $668K | ﹤0.01% |
175,500
+101,000
| +136% | +$533K |
|
3085
CALL
Masco
MAS
$16.4B
| $668K | ﹤0.01% |
12,500
-9,200
| -42% | -$530K |
|
3086
CALL
Blackstone Secured Lending
BXSL
$5.35B
| $667K | ﹤0.01% |
24,400
-11,800
| -33% | -$327K |
|
|
CMLS
3087
PUT
DELISTED
Cumulus Media Inc. Class A Common Stock
CMLS
| $667K | ﹤0.01% |
131,200
+100,500
| +327% | +$477K |
|
3088
CALL
LendingTree
TREE
$564M
| $666K | ﹤0.01% |
43,000
+26,300
| +157% | +$533K |
|
3089
CALL
Cavco Industries
CVCO
$4.46B
| $664K | ﹤0.01% |
2,500
+900
| +56% | +$252K |
|
3090
Leggett & Platt
LEG
$1.5B
| $664K | ﹤0.01% |
26,169
+15,592
| +147% | +$438K |
|
3091
PUT
Mettler-Toledo International
MTD
$27B
| $664K | ﹤0.01% |
600
| – | – |
|
3092
ArcBest
ARCB
$3.31B
| $663K | ﹤0.01% |
6,529
+6,155
| +1,646% | +$646K |
|
|
NVMI
3093
CALL
Nova
NVMI
$13.6B
| $663K | ﹤0.01% |
5,900
-4,200
| -42% | -$494K |
|
3094
CALL
Vanguard Total International Stock ETF
VXUS
$153B
| $663K | ﹤0.01% |
12,400
+7,800
| +170% | +$435K |
|
|
VISN
3095
Vistance Networks Inc
VISN
$2.67B
| $662K | ﹤0.01% |
197,097
-119,644
| -38% | -$490K |
|
3096
PUT
Perrigo
PRGO
$1.4B
| $661K | ﹤0.01% |
20,700
-12,800
| -38% | -$451K |
|
3097
CALL
Travel + Leisure Co
TNL
$4.68B
| $661K | ﹤0.01% |
18,000
+4,500
| +33% | +$180K |
|
3098
CALL
Telefônica Brasil
VIV
$22.5B
| $661K | ﹤0.01% |
78,700
-233,500
| -75% | -$2.03M |
|
3099
PUT
Packaging Corp of America
PKG
$22.5B
| $660K | ﹤0.01% |
4,300
+2,500
| +139% | +$365K |
|
3100
PUT
Hess Midstream
HESM
$5.11B
| $658K | ﹤0.01% |
22,600
-36,400
| -62% | -$1.1M |
|
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.