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 | |
|---|---|---|---|---|---|---|
3551
PUT
Redwire
RDW
$2.05B
| $435K | ﹤0.01% |
150,600
+85,100
| +130% | +$274K |
|
|
SAND
3552
CALL
DELISTED
Sandstorm Gold
SAND
| $435K | ﹤0.01% |
93,500
+11,600
| +14% | +$60.9K |
|
3553
PUT
Seanergy Maritime Holdings
SHIP
$348M
| $435K | ﹤0.01% |
78,900
+78,400
| +15,680% | +$417K |
|
|
BIOR
3554
CALL
DELISTED
Biora Therapeutics, Inc. Common Stock
BIOR
| $435K | ﹤0.01% |
20,060
+60
| +0.3% | +$1.92K |
|
3555
PUT
Manhattan Associates
MANH
$9.95B
| $434K | ﹤0.01% |
2,200
+2,100
| +2,100% | +$410K |
|
3556
J.M. Smucker
SJM
$13.2B
| $434K | ﹤0.01% |
+3,537
| New | +$502K |
|
3557
CALL
Sun Life Financial
SLF
$46.6B
| $434K | ﹤0.01% |
8,900
+2,300
| +35% | +$115K |
|
3558
Doximity
DOCS
$3.85B
| $433K | ﹤0.01% |
20,447
-51,632
| -72% | -$1.41M |
|
|
LTC
3559
CALL
LTC Properties
LTC
$2.14B
| $433K | ﹤0.01% |
13,500
-400
| -3% | -$13.2K |
|
3560
CALL
SandRidge Energy
SD
$485M
| $433K | ﹤0.01% |
27,700
+100
| +0.4% | +$1.6K |
|
3561
Direxion Daily Technology Bull 3x ETF
TECL
$4.77B
| $433K | ﹤0.01% |
10,057
-16,764
| -63% | -$849K |
|
3562
PUT
AST SpaceMobile
ASTS
$16.9B
| $432K | ﹤0.01% |
113,700
-105,100
| -48% | -$424K |
|
|
P
3563
Everpure Inc
P
$24.3B
| $432K | ﹤0.01% |
+12,137
| New | +$450K |
|
|
ITCI
3564
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $432K | ﹤0.01% |
8,300
+6,400
| +337% | +$373K |
|
3565
PUT
Century Aluminum
CENX
$4.35B
| $430K | ﹤0.01% |
59,900
+11,400
| +24% | +$91.8K |
|
3566
TD Synnex
SNX
$19.8B
| $430K | ﹤0.01% |
4,313
+3,934
| +1,038% | +$389K |
|
|
ATVI
3567
PUT
DELISTED
Activision Blizzard
ATVI
| $430K | ﹤0.01% |
456,800
+159,500
| +54% | +$14.6M |
|
|
DCH
3568
Dauch Corp
DCH
$1.33B
| $429K | ﹤0.01% |
59,217
+40,269
| +213% | +$324K |
|
3569
Teucrium Corn Fund
CORN
$180M
| $429K | ﹤0.01% |
19,522
-7,110
| -27% | -$161K |
|
3570
PUT
Mohawk Industries
MHK
$7.14B
| $429K | ﹤0.01% |
5,000
-300
| -6% | -$30.2K |
|
3571
PUT
Nextpower Inc
NXT
$14.5B
| $429K | ﹤0.01% |
10,700
-3,000
| -22% | -$121K |
|
|
WCN
3572
CALL
Waste Connections
WCN
$42.7B
| $429K | ﹤0.01% |
3,200
-3,300
| -51% | -$462K |
|
3573
PUT
Delek US
DK
$3.85B
| $428K | ﹤0.01% |
15,100
+1,800
| +14% | +$48.6K |
|
3574
PUT
Knight Transportation
KNX
$11.4B
| $426K | ﹤0.01% |
8,500
-102,400
| -92% | -$5.68M |
|
3575
Moody's
MCO
$83.9B
| $426K | ﹤0.01% |
1,348
-3,195
| -70% | -$1.09M |
|
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.