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 | |
|---|---|---|---|---|---|---|
4501
Saic
SAIC
$4.95B
| $174K | ﹤0.01% |
+1,652
| New | +$190K |
|
4502
PUT
Tecnoglass
TGLS
$1.99B
| $174K | ﹤0.01% |
5,300
-4,400
| -45% | -$180K |
|
4503
PUT
EXL Service
EXLS
$5.5B
| $173K | ﹤0.01% |
6,200
+5,200
| +520% | +$152K |
|
4504
CALL
Global Partners
GLP
$1.65B
| $173K | ﹤0.01% |
4,900
-3,600
| -42% | -$115K |
|
4505
CALL
Haleon
HLN
$45.3B
| $173K | ﹤0.01% |
20,800
-26,000
| -56% | -$217K |
|
4506
CALL
Monarch Casino & Resort
MCRI
$2.2B
| $173K | ﹤0.01% |
+2,800
| New | +$189K |
|
4507
CALL
Ocular Therapeutix
OCUL
$1.83B
| $173K | ﹤0.01% |
55,200
+7,400
| +15% | +$30.3K |
|
4508
Pembina Pipeline
PBA
$29.3B
| $173K | ﹤0.01% |
+5,761
| New | +$177K |
|
4509
PUT
Sensata Technologies
ST
$6.69B
| $173K | ﹤0.01% |
4,600
+3,600
| +360% | +$145K |
|
|
SUPV
4510
CALL
Grupo Supervielle
SUPV
$823M
| $173K | ﹤0.01% |
78,000
-105,500
| -57% | -$303K |
|
4511
Credit Acceptance
CACC
$5.82B
| $172K | ﹤0.01% |
374
-433
| -54% | -$219K |
|
4512
PUT
Equinox Gold
EQX
$7.07B
| $172K | ﹤0.01% |
40,700
-7,100
| -15% | -$34.3K |
|
|
LITS
4513
Lite Strategy Inc
LITS
$32.4M
| $172K | ﹤0.01% |
24,628
+20,302
| +469% | +$133K |
|
4514
CALL
ThredUp
TDUP
$765M
| $172K | ﹤0.01% |
+42,900
| New | +$146K |
|
4515
PUT
Trimble
TRMB
$13.6B
| $172K | ﹤0.01% |
3,200
-100
| -3% | -$5.3K |
|
|
ARCE
4516
PUT
DELISTED
Arco Platform Limited Class A Common Shares
ARCE
| $172K | ﹤0.01% |
12,500
| – | – |
|
4517
CALL
iShares Core Dividend ETF
DIVB
$1.71B
| $171K | ﹤0.01% |
4,900
+200
| +4% | +$7.75K |
|
4518
PUT
Expeditors International
EXPD
$22.3B
| $171K | ﹤0.01% |
1,500
-5,900
| -80% | -$701K |
|
4519
FS KKR Capital
FSK
$3.01B
| $171K | ﹤0.01% |
+8,689
| New | +$174K |
|
4520
PUT
LoveSac
LOVE
$242M
| $171K | ﹤0.01% |
8,600
-2,300
| -21% | -$56.7K |
|
4521
CALL
Navigator Holdings
NVGS
$1.35B
| $171K | ﹤0.01% |
11,600
+1,100
| +10% | +$15.2K |
|
|
SILV
4522
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $171K | ﹤0.01% |
38,800
-19,500
| -33% | -$99.2K |
|
4523
CALL
Butterfly Network
BFLY
$1.86B
| $170K | ﹤0.01% |
144,100
-45,700
| -24% | -$88.5K |
|
4524
CALL
Crescent Energy
CRGY
$3.65B
| $170K | ﹤0.01% |
13,500
+10,800
| +400% | +$132K |
|
|
GOOS
4525
PUT
Canada Goose Holdings
GOOS
$903M
| $170K | ﹤0.01% |
11,600
-5,200
| -31% | -$84.8K |
|
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.