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 | |
|---|---|---|---|---|---|---|
2951
SBA Communications
SBAC
$18.4B
| $763K | ﹤0.01% |
3,812
-12,145
| -76% | -$2.7M |
|
|
BLUE
2952
DELISTED
bluebird bio
BLUE
| $762K | ﹤0.01% |
12,535
+570
| +5% | +$40K |
|
2953
CALL
Revolution Medicines
RVMD
$39.8B
| $761K | ﹤0.01% |
27,500
+26,300
| +2,192% | +$780K |
|
2954
PUT
Zevra Therapeutics
ZVRA
$576M
| $761K | ﹤0.01% |
157,900
-15,000
| -9% | -$74.9K |
|
2955
CALL
Recursion Pharmaceuticals
RXRX
$1.63B
| $760K | ﹤0.01% |
99,400
+70,100
| +239% | +$699K |
|
2956
PUT
Arhaus
ARHS
$1.12B
| $759K | ﹤0.01% |
81,700
+55,300
| +209% | +$580K |
|
2957
ARK Blockchain & Fintech Innovation ETF
ARKF
$737M
| $759K | ﹤0.01% |
39,239
+10,750
| +38% | +$229K |
|
2958
CALL
Bread Financial
BFH
$4.33B
| $759K | ﹤0.01% |
22,200
-7,900
| -26% | -$290K |
|
2959
Tapestry
TPR
$29.4B
| $758K | ﹤0.01% |
+26,374
| New | +$966K |
|
|
VTNR
2960
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $758K | ﹤0.01% |
170,500
-416,500
| -71% | -$2.14M |
|
|
HT
2961
PUT
DELISTED
Hersha Hospitality Trust Priority Class A Common Shares of Beneficial Interest
HT
| $758K | ﹤0.01% |
+76,900
| New | +$589K |
|
2962
Republic Services
RSG
$67.3B
| $757K | ﹤0.01% |
5,312
-3,939
| -43% | -$585K |
|
2963
CALL
Vera Bradley
VRA
$107M
| $756K | ﹤0.01% |
114,400
-2,500
| -2% | -$16.6K |
|
2964
PUT
WillScot Mobile Mini Holdings
WSC
$4.79B
| $756K | ﹤0.01% |
18,200
+1,300
| +8% | +$57.2K |
|
|
DSKE
2965
PUT
DELISTED
Daseke, Inc. Common Stock
DSKE
| $754K | ﹤0.01% |
147,100
+66,800
| +83% | +$403K |
|
2966
Fortive
FTV
$19.1B
| $753K | ﹤0.01% |
+13,480
| New | +$775K |
|
|
AL
2967
CALL
DELISTED
Air Lease Corp
AL
| $752K | ﹤0.01% |
19,100
+13,100
| +218% | +$539K |
|
2968
CALL
Group 1 Automotive
GPI
$4.02B
| $752K | ﹤0.01% |
2,800
-11,300
| -80% | -$2.96M |
|
2969
CALL
Integer Holdings
ITGR
$3.35B
| $752K | ﹤0.01% |
9,600
+3,300
| +52% | +$280K |
|
2970
PUT
Lightspeed Commerce
LSPD
$1.35B
| $752K | ﹤0.01% |
53,600
-28,700
| -35% | -$464K |
|
2971
CALL
Sweetgreen
SG
$738M
| $752K | ﹤0.01% |
64,000
-43,800
| -41% | -$610K |
|
|
SNBR
2972
DELISTED
Sleep Number
SNBR
| $752K | ﹤0.01% |
30,610
-109,293
| -78% | -$3.06M |
|
2973
CALL
GrowGeneration
GRWG
$90.1M
| $751K | ﹤0.01% |
257,300
-41,500
| -14% | -$136K |
|
2974
PUT
IMAX
IMAX
$2.47B
| $751K | ﹤0.01% |
38,900
| – | – |
|
2975
PUT
Douglas Emmett
DEI
$2.04B
| $750K | ﹤0.01% |
58,800
+37,400
| +175% | +$506K |
|
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.