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 | |
|---|---|---|---|---|---|---|
|
BCLI
6601
PUT
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $20K | ﹤0.01% |
6,713
+3,513
| +110% | +$79.9K |
|
6602
VanEck BDC Income ETF
BIZD
$1.6B
| $20K | ﹤0.01% |
1,257
+1,211
| +2,633% | +$19K |
|
6603
BioXcel Therapeutics
BTAI
$24.5M
| $20K | ﹤0.01% |
+505
| New | +$51K |
|
|
BURU
6604
PUT
DELISTED
NUBURU INC
BURU
| $20K | ﹤0.01% |
295
+287
| +3,588% | +$28.7K |
|
6605
CALL
Bioventus
BVS
$893M
| $20K | ﹤0.01% |
6,300
-64,400
| -91% | -$226K |
|
6606
Castor Maritime
CTRM
$18.9M
| $20K | ﹤0.01% |
4,630
+266
| +6% | +$1.18K |
|
6607
CVB Financial
CVBF
$4B
| $20K | ﹤0.01% |
+1,225
| New | +$20.8K |
|
|
EARN
6608
CALL
Ellington Residential Mortgage REIT
EARN
$168M
| $20K | ﹤0.01% |
3,300
-3,100
| -48% | -$21.1K |
|
6609
PUT
Ero Copper
ERO
$2.82B
| $20K | ﹤0.01% |
1,200
+400
| +50% | +$8.17K |
|
6610
Federated Hermes
FHI
$4.51B
| $20K | ﹤0.01% |
599
-92
| -13% | -$3.17K |
|
6611
CALL
Fortrea Holdings
FTRE
$1.8B
| $20K | ﹤0.01% |
+700
| New | +$20.7K |
|
6612
First Watch Restaurant Group
FWRG
$822M
| $20K | ﹤0.01% |
1,210
-183
| -13% | -$3.38K |
|
6613
Galectin Therapeutics
GALT
$213M
| $20K | ﹤0.01% |
10,697
+1,883
| +21% | +$3.1K |
|
6614
CALL
iShares S&P GSCI Commodity-Indexed Trust
GSG
$995M
| $20K | ﹤0.01% |
900
+200
| +29% | +$4.3K |
|
6615
PUT
Humacyte
HUMA
$181M
| $20K | ﹤0.01% |
7,000
+2,200
| +46% | +$7.28K |
|
6616
CALL
IDEX
IEX
$17.3B
| $20K | ﹤0.01% |
+100
| New | +$21.7K |
|
|
MZTI
6617
The Marzetti Company
MZTI
$2.95B
| $20K | ﹤0.01% |
+122
| New | +$22K |
|
6618
PUT
Lloyds Banking Group
LYG
$90.7B
| $20K | ﹤0.01% |
9,500
+1,000
| +12% | +$2.17K |
|
6619
CALL
MediciNova
MNOV
$66M
| $20K | ﹤0.01% |
9,600
| – | – |
|
6620
Movado Group
MOV
$849M
| $20K | ﹤0.01% |
743
+552
| +289% | +$15K |
|
|
NAK
6621
CALL
Northern Dynasty Minerals
NAK
$779M
| $20K | ﹤0.01% |
62,400
-91,300
| -59% | -$25.8K |
|
6622
CALL
OppFi
OPFI
$804M
| $20K | ﹤0.01% |
8,000
-11,100
| -58% | -$25.8K |
|
6623
CALL
Organogenesis Holdings
ORGO
$315M
| $20K | ﹤0.01% |
6,300
-13,800
| -69% | -$43.9K |
|
6624
CALL
Vaxcyte
PCVX
$8.08B
| $20K | ﹤0.01% |
400
-20,400
| -98% | -$1.01M |
|
|
6625
PUT
Vaxcyte
PCVX
$8.08B
| $20K | ﹤0.01% |
400
-25,700
| -98% | -$1.27M |
|
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.