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 | |
|---|---|---|---|---|---|---|
|
SHOE
4526
CALL
Shoe Station Group
SHOE
$424M
| $170K | ﹤0.01% |
+7,100
| New | +$168K |
|
4527
TransAlta
TAC
$3.93B
| $170K | ﹤0.01% |
+19,632
| New | +$191K |
|
|
UCB
4528
CALL
United Community Banks
UCB
$4.26B
| $170K | ﹤0.01% |
6,700
+5,000
| +294% | +$135K |
|
4529
PUT
Federal Agricultural Mortgage Class A
AGM.A
$1.66B
| $169K | ﹤0.01% |
1,100
-500
| -31% | -$67.2K |
|
4530
PUT
Brookdale Senior Living
BKD
$3.55B
| $169K | ﹤0.01% |
41,000
-68,600
| -63% | -$275K |
|
4531
CALL
Genco Shipping & Trading
GNK
$1.1B
| $169K | ﹤0.01% |
12,100
-9,200
| -43% | -$127K |
|
4532
PUT
Oil States International
OIS
$466M
| $169K | ﹤0.01% |
20,300
+8,600
| +74% | +$69.7K |
|
4533
CALL
Portillo's
PTLO
$345M
| $169K | ﹤0.01% |
11,000
-30,800
| -74% | -$601K |
|
|
ATSG
4534
PUT
DELISTED
Air Transport Services Group
ATSG
| $169K | ﹤0.01% |
8,100
-11,200
| -58% | -$233K |
|
4535
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1B
| $168K | ﹤0.01% |
7,495
+2,164
| +41% | +$46.5K |
|
4536
PUT
Goldman Sachs ActiveBeta International Equity ETF
GSIE
$5.9B
| $168K | ﹤0.01% |
+3,900
| New | +$122K |
|
4537
PUT
Lufax Holding
LU
$1.33B
| $168K | ﹤0.01% |
39,725
-4,425
| -10% | -$24.5K |
|
4538
Miller Industries
MLR
$577M
| $168K | ﹤0.01% |
4,303
+372
| +9% | +$14.3K |
|
4539
PUT
Simplify US Equity PLUS Convexity ETF
SPYC
$109M
| $168K | ﹤0.01% |
6,200
+2,700
| +77% | +$78.5K |
|
|
TUP
4540
DELISTED
Tupperware Brands Corporation
TUP
| $168K | ﹤0.01% |
+120,067
| New | +$269K |
|
|
AGNT
4541
PUT
AGNT Inc
AGNT
$629M
| $167K | ﹤0.01% |
10,300
+5,200
| +102% | +$107K |
|
4542
Fidus Investment
FDUS
$759M
| $167K | ﹤0.01% |
+8,737
| New | +$172K |
|
4543
PUT
Tenaris
TS
$28.2B
| $167K | ﹤0.01% |
5,300
-6,100
| -54% | -$197K |
|
4544
PUT
Tetra Tech
TTEK
$8.77B
| $167K | ﹤0.01% |
5,500
+5,000
| +1,000% | +$162K |
|
4545
Autoliv
ALV
$9.14B
| $166K | ﹤0.01% |
1,724
-11,817
| -87% | -$1.13M |
|
4546
PUT
Digital Turbine
APPS
$982M
| $166K | ﹤0.01% |
27,500
-51,200
| -65% | -$456K |
|
4547
Comcast
CMCSA
$87.3B
| $166K | ﹤0.01% |
3,752
-135,100
| -97% | -$6.03M |
|
4548
CALL
Dolby
DLB
$4.97B
| $166K | ﹤0.01% |
2,100
-21,700
| -91% | -$1.82M |
|
4549
iShares MSCI Chile ETF
ECH
$1,000M
| $166K | ﹤0.01% |
6,359
+5,984
| +1,596% | +$173K |
|
4550
Guidewire Software
GWRE
$13.9B
| $166K | ﹤0.01% |
1,849
-2,153
| -54% | -$180K |
|
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.