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 | |
|---|---|---|---|---|---|---|
2376
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.38M | ﹤0.01% |
139,800
-28,700
| -17% | -$333K |
|
2377
CALL
Mohawk Industries
MHK
$6.9B
| $1.38M | ﹤0.01% |
16,100
+2,600
| +19% | +$262K |
|
|
SAVE
2378
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $1.38M | ﹤0.01% |
83,700
+58,500
| +232% | +$996K |
|
2379
PUT
ACM Research
ACMR
$5.83B
| $1.38M | ﹤0.01% |
76,200
+58,200
| +323% | +$865K |
|
2380
CALL
Hubbell
HUBB
$25.7B
| $1.38M | ﹤0.01% |
4,400
+2,100
| +91% | +$669K |
|
2381
CALL
Nabors Industries
NBR
$1.23B
| $1.38M | ﹤0.01% |
11,200
+2,500
| +29% | +$291K |
|
2382
Wheaton Precious Metals
WPM
$50.6B
| $1.38M | ﹤0.01% |
+34,022
| New | +$1.47M |
|
2383
CALL
Archer Aviation
ACHR
$3.64B
| $1.38M | ﹤0.01% |
271,900
+126,000
| +86% | +$723K |
|
2384
PUT
Ametek
AME
$55.5B
| $1.37M | ﹤0.01% |
9,300
+8,000
| +615% | +$1.25M |
|
2385
PVH
PVH
$3.71B
| $1.37M | ﹤0.01% |
+17,952
| New | +$1.49M |
|
2386
PUT
Ventas
VTR
$48.9B
| $1.37M | ﹤0.01% |
32,600
-7,600
| -19% | -$342K |
|
|
DEN
2387
CALL
DELISTED
Denbury Inc.
DEN
| $1.37M | ﹤0.01% |
14,000
-2,200
| -14% | -$199K |
|
|
IRBT
2388
DELISTED
iRobot
IRBT
| $1.37M | ﹤0.01% |
36,160
+29,990
| +486% | +$1.2M |
|
2389
CALL
Banco Bradesco
BBD
$38.1B
| $1.37M | ﹤0.01% |
480,560
+10,200
| +2% | +$32.3K |
|
2390
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $1.37M | ﹤0.01% |
8,800
-5,300
| -38% | -$859K |
|
2391
CALL
Extra Space Storage
EXR
$31.2B
| $1.36M | ﹤0.01% |
11,200
+9,200
| +460% | +$1.24M |
|
2392
CALL
Westrock Coffee
WEST
$741M
| $1.36M | ﹤0.01% |
153,600
+13,500
| +10% | +$141K |
|
2393
CALL
Gerdau
GGB
$9.44B
| $1.36M | ﹤0.01% |
342,120
+145,560
| +74% | +$647K |
|
2394
PUT
Invitation Homes
INVH
$17.7B
| $1.36M | ﹤0.01% |
42,900
+26,600
| +163% | +$914K |
|
2395
PUT
Freshworks
FRSH
$2.84B
| $1.36M | ﹤0.01% |
68,200
+51,900
| +318% | +$1.03M |
|
2396
CALL
Teradata
TDC
$2.68B
| $1.35M | ﹤0.01% |
30,100
-5,500
| -15% | -$269K |
|
|
BCYC
2397
PUT
Bicycle Therapeutics
BCYC
$270M
| $1.35M | ﹤0.01% |
67,400
+6,800
| +11% | +$155K |
|
2398
PUT
Terex
TEX
$7.98B
| $1.35M | ﹤0.01% |
23,500
+7,100
| +43% | +$423K |
|
2399
PUT
TAL Education Group
TAL
$5.71B
| $1.35M | ﹤0.01% |
148,200
-174,400
| -54% | -$1.22M |
|
|
BORR
2400
PUT
Borr Drilling
BORR
$1.31B
| $1.35M | ﹤0.01% |
190,100
+700
| +0.4% | +$5.33K |
|
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.