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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6726
MGIC Investment
MTG
$6.44B
| $19K | ﹤0.01% |
+821
| New | +$20.5K |
|
6727
CALL
Paymentus
PAY
$4.39B
| $19K | ﹤0.01% |
600
-200
| -25% | -$5.94K |
|
6728
CALL
Progress Software
PRGS
$1.65B
| $19K | ﹤0.01% |
300
-6,700
| -96% | -$448K |
|
6729
PUT
Quad
QUAD
$509M
| $19K | ﹤0.01% |
2,800
-500
| -15% | -$3.38K |
|
6730
Global X Nasdaq 100 Covered Call & Growth ETF
QYLG
$154M
| $19K | ﹤0.01% |
+686
| New | +$22.4K |
|
6731
CALL
RXO
RXO
$3.39B
| $19K | ﹤0.01% |
800
-2,300
| -74% | -$64.2K |
|
6732
CALL
Banco Santander
SAN
$202B
| $19K | ﹤0.01% |
4,300
-9,700
| -69% | -$46.6K |
|
6733
CALL
Suzano
SUZ
$10.4B
| $19K | ﹤0.01% |
1,900
-4,300
| -69% | -$44K |
|
6734
CALL
TTM Technologies
TTMI
$12B
| $19K | ﹤0.01% |
800
-18,700
| -96% | -$424K |
|
6735
Vista Energy
VIST
$7.63B
| $19K | ﹤0.01% |
369
+161
| +77% | +$8.3K |
|
|
VMEO
6736
PUT
DELISTED
Vimeo
VMEO
| $19K | ﹤0.01% |
3,000
+1,200
| +67% | +$7.22K |
|
6737
CALL
WidePoint Corp
WYY
$97M
| $19K | ﹤0.01% |
+4,100
| New | +$17.7K |
|
|
EQLT
6738
PUT
iShares MSCI Emerging Markets Quality Factor ETF
EQLT
$11.8M
| $19K | ﹤0.01% |
+800
| New | +$19.8K |
|
|
SILA
6739
PUT
DELISTED
Sila Realty Trust
SILA
| $19K | ﹤0.01% |
800
+500
| +167% | +$12.6K |
|
|
ENLC
6740
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $19K | ﹤0.01% |
135,000
-32,500
| -19% | -$485K |
|
6741
AbCellera Biologics
ABCL
$1.74B
| $18K | ﹤0.01% |
6,176
-58,007
| -90% | -$162K |
|
6742
PUT
Aegon
AEG
$14B
| $18K | ﹤0.01% |
+3,100
| New | +$19.4K |
|
6743
Sphere 3D
ANY
$18M
| $18K | ﹤0.01% |
1,954
-2,288
| -54% | -$26.6K |
|
6744
PUT
Avista
AVA
$3.39B
| $18K | ﹤0.01% |
500
| – | – |
|
6745
Breakwave Dry Bulk Shipping ETF
BDRY
$29.4M
| $18K | ﹤0.01% |
3,044
+2,852
| +1,485% | +$21.7K |
|
6746
PUT
Popular Inc
BPOP
$11.2B
| $18K | ﹤0.01% |
200
| – | – |
|
|
BRT
6747
CALL
BRT Apartments
BRT
$284M
| $18K | ﹤0.01% |
1,000
-1,300
| -57% | -$23.6K |
|
6748
CALL
Community Bank
CBU
$3.42B
| $18K | ﹤0.01% |
300
+100
| +50% | +$6.4K |
|
6749
ChargePoint
CHPT
$142M
| $18K | ﹤0.01% |
868
-5,720
| -87% | -$142K |
|
6750
PUT
Caledonia Mining Corp
CMCL
$364M
| $18K | ﹤0.01% |
2,000
+1,800
| +900% | +$23K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.