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 | |
|---|---|---|---|---|---|---|
|
JPGE
1676
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $3.17M | ﹤0.01% |
59,200
-18,600
| -24% | -$996K |
|
|
PACW
1677
PUT
DELISTED
PacWest Bancorp
PACW
| $3.17M | ﹤0.01% |
400,300
-420,200
| -51% | -$3.51M |
|
1678
PUT
Iron Mountain
IRM
$38.2B
| $3.16M | ﹤0.01% |
53,200
-72,200
| -58% | -$4.41M |
|
1679
CALL
Under Armour Class C
UA
$2.92B
| $3.16M | ﹤0.01% |
467,000
+189,400
| +68% | +$1.3M |
|
1680
PUT
Sinclair Inc
SBGI
$974M
| $3.15M | ﹤0.01% |
281,200
-29,100
| -9% | -$375K |
|
1681
Lantheus
LNTH
$6.82B
| $3.15M | ﹤0.01% |
45,319
+39,094
| +628% | +$2.86M |
|
1682
CALL
MGP Ingredients
MGPI
$378M
| $3.14M | ﹤0.01% |
+29,800
| New | +$3.38M |
|
|
DISH
1683
CALL
DELISTED
DISH Network Corp.
DISH
| $3.14M | ﹤0.01% |
536,100
-301,200
| -36% | -$2.05M |
|
1684
PUT
Shift4
FOUR
$3.84B
| $3.14M | ﹤0.01% |
56,700
+39,500
| +230% | +$2.41M |
|
1685
PUT
Franco-Nevada
FNV
$41.4B
| $3.14M | ﹤0.01% |
23,500
-33,900
| -59% | -$4.79M |
|
1686
PUT
Citizens Financial Group
CFG
$30.4B
| $3.13M | ﹤0.01% |
116,900
-156,200
| -57% | -$4.47M |
|
1687
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $3.13M | ﹤0.01% |
11,000
-43,300
| -80% | -$12.3M |
|
1688
CALL
Herbalife
HLF
$1.23B
| $3.13M | ﹤0.01% |
223,500
+201,600
| +921% | +$3.05M |
|
1689
PUT
Tapestry
TPR
$28.8B
| $3.12M | ﹤0.01% |
108,500
-64,200
| -37% | -$2.35M |
|
1690
CALL
Bio-Rad Laboratories Class A
BIO
$8.42B
| $3.12M | ﹤0.01% |
8,700
-6,200
| -42% | -$2.39M |
|
|
PR
1691
PUT
Permian Resources
PR
$17.9B
| $3.12M | ﹤0.01% |
223,400
+29,700
| +15% | +$374K |
|
1692
CALL
QuantumScape Corp
QS
$3B
| $3.12M | ﹤0.01% |
466,100
-72,700
| -13% | -$592K |
|
1693
CALL
TKO Group
TKO
$13.5B
| $3.12M | ﹤0.01% |
+37,100
| New | +$3.44M |
|
1694
PUT
Barclays
BCS
$94.1B
| $3.12M | ﹤0.01% |
400,000
-68,100
| -15% | -$528K |
|
1695
CALL
Wingstop
WING
$3.68B
| $3.11M | ﹤0.01% |
17,300
-23,700
| -58% | -$4.1M |
|
1696
PUT
Caleres
CAL
$396M
| $3.11M | ﹤0.01% |
108,000
+1,400
| +1% | +$37.1K |
|
1697
PUT
TechnipFMC
FTI
$30.6B
| $3.1M | ﹤0.01% |
152,700
-77,000
| -34% | -$1.45M |
|
1698
PUT
Teladoc Health
TDOC
$1.58B
| $3.1M | ﹤0.01% |
167,000
-14,600
| -8% | -$341K |
|
1699
CALL
Commercial Metals
CMC
$7.63B
| $3.1M | ﹤0.01% |
62,800
-400
| -0.6% | -$21.8K |
|
1700
PUT
Pool Corp
POOL
$6.7B
| $3.1M | ﹤0.01% |
8,700
-16,300
| -65% | -$5.93M |
|
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.