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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5676
PUT
Cohu
COHU
$2.26B
| $74K | ﹤0.01% |
2,100
+1,400
| +200% | +$46.5K |
|
5677
PUT
Corsair Gaming
CRSR
$1.13B
| $74K | ﹤0.01% |
5,300
-600
| -10% | -$8.04K |
|
|
CUK
5678
PUT
DELISTED
Carnival PLC
CUK
| $74K | ﹤0.01% |
4,400
-19,300
| -81% | -$253K |
|
|
CVGW
5679
DELISTED
Calavo Growers
CVGW
| $74K | ﹤0.01% |
+2,533
| New | +$65.3K |
|
5680
Crexendo
CXDO
$223M
| $74K | ﹤0.01% |
+15,297
| New | +$40.2K |
|
|
DRD
5681
CALL
DRDGold
DRD
$1.77B
| $74K | ﹤0.01% |
9,400
+9,000
| +2,250% | +$77.2K |
|
5682
PUT
indie Semiconductor
INDI
$682M
| $74K | ﹤0.01% |
9,200
-54,700
| -86% | -$357K |
|
5683
CALL
Lamar Advertising Co
LAMR
$16.2B
| $74K | ﹤0.01% |
700
-12,400
| -95% | -$1.17M |
|
|
PRA
5684
CALL
DELISTED
ProAssurance
PRA
| $74K | ﹤0.01% |
+5,400
| New | +$82.6K |
|
|
QIPT
5685
DELISTED
Quipt Home Medical
QIPT
| $74K | ﹤0.01% |
14,608
+2,154
| +17% | +$10.3K |
|
|
SII
5686
CALL
Sprott
SII
$2.66B
| $74K | ﹤0.01% |
2,200
+1,700
| +340% | +$52.6K |
|
5687
PUT
Champion Homes
SKY
$4.37B
| $74K | ﹤0.01% |
1,000
-20,100
| -95% | -$1.26M |
|
5688
CALL
TransAlta
TAC
$3.95B
| $74K | ﹤0.01% |
9,000
+2,600
| +41% | +$21K |
|
5689
CALL
Telefônica Brasil
VIV
$20.6B
| $74K | ﹤0.01% |
8,800
-69,900
| -89% | -$697K |
|
5690
PUT
Veralto
VLTO
$23B
| $74K | ﹤0.01% |
+900
| New | +$67.2K |
|
|
FUSN
5691
PUT
DELISTED
Fusion Pharmaceuticals Inc. Common Shares
FUSN
| $74K | ﹤0.01% |
+7,800
| New | +$37.9K |
|
5692
PUT
Acumen Pharmaceuticals
ABOS
$155M
| $73K | ﹤0.01% |
19,100
-7,300
| -28% | -$21.7K |
|
5693
Alta Equipment Group
ALTG
$214M
| $73K | ﹤0.01% |
5,937
-15,726
| -73% | -$170K |
|
5694
Amcor
AMCR
$20.8B
| $73K | ﹤0.01% |
1,530
-171
| -10% | -$7.85K |
|
|
BCTX
5695
Briacell Therapeutics
BCTX
$29.9M
| $73K | ﹤0.01% |
+83
| New | +$59.6K |
|
5696
PUT
Beam Global
BEEM
$23.3M
| $73K | ﹤0.01% |
10,300
-2,200
| -18% | -$13.8K |
|
5697
PUT
Coca-Cola Europacific Partners
CCEP
$48.3B
| $73K | ﹤0.01% |
1,100
-1,800
| -62% | -$110K |
|
|
CRESY
5698
PUT
Cresud
CRESY
$795M
| $73K | ﹤0.01% |
7,866
+6,746
| +602% | +$55.1K |
|
|
FFWM
5699
DELISTED
First Foundation Inc
FFWM
| $73K | ﹤0.01% |
7,625
+7,316
| +2,368% | +$46.6K |
|
5700
Fluence Energy
FLNC
$1.85B
| $73K | ﹤0.01% |
3,098
-277
| -8% | -$5.83K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.