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 | |
|---|---|---|---|---|---|---|
5526
CALL
Ezcorp Inc
EZPW
$1.83B
| $87K | ﹤0.01% |
10,000
+8,900
| +809% | +$74.7K |
|
5527
PUT
Global Net Lease
GNL
$1.84B
| $87K | ﹤0.01% |
8,800
+2,800
| +47% | +$24.5K |
|
|
MFA
5528
CALL
MFA Financial
MFA
$926M
| $87K | ﹤0.01% |
9,000
-86,900
| -91% | -$878K |
|
5529
CALL
Oceaneering
OII
$4.86B
| $87K | ﹤0.01% |
4,100
-7,200
| -64% | -$160K |
|
5530
CALL
Saic
SAIC
$4.95B
| $87K | ﹤0.01% |
700
+600
| +600% | +$69.8K |
|
|
TGB
5531
Trekor Metals
TGB
$2.48B
| $87K | ﹤0.01% |
62,828
+1,562
| +3% | +$1.92K |
|
5532
PUT
Petco
WOOF
$797M
| $87K | ﹤0.01% |
27,700
-22,300
| -45% | -$77K |
|
|
JOYY
5533
PUT
JOYY Inc
JOYY
$3.71B
| $87K | ﹤0.01% |
2,200
-3,400
| -61% | -$135K |
|
|
AFCG
5534
CALL
AFC Gamma
AFCG
$61.4M
| $86K | ﹤0.01% |
10,519
+8,327
| +380% | +$65.6K |
|
5535
Actinium Pharmaceuticals
ATNM
$26.3M
| $86K | ﹤0.01% |
17,089
+4,106
| +32% | +$21.1K |
|
5536
CALL
Coca-Cola Europacific Partners
CCEP
$48.3B
| $86K | ﹤0.01% |
1,300
-2,900
| -69% | -$177K |
|
5537
CALL
Columbia Financial
CLBK
$1.12B
| $86K | ﹤0.01% |
4,500
| – | – |
|
5538
CALL
Helios Technologies
HLIO
$2.57B
| $86K | ﹤0.01% |
+1,900
| New | +$87.8K |
|
5539
CALL
Kornit Digital
KRNT
$705M
| $86K | ﹤0.01% |
4,500
-17,900
| -80% | -$310K |
|
5540
Orion Group Holdings
ORN
$396M
| $86K | ﹤0.01% |
17,422
-44,845
| -72% | -$221K |
|
5541
Invesco Leisure and Entertainment ETF
PEJ
$259M
| $86K | ﹤0.01% |
2,072
+1,974
| +2,014% | +$76.3K |
|
5542
PUT
Q2 Holdings
QTWO
$3.8B
| $86K | ﹤0.01% |
2,000
-6,600
| -77% | -$234K |
|
5543
RBC Bearings
RBC
$17.4B
| $86K | ﹤0.01% |
302
-327
| -52% | -$80.2K |
|
5544
PUT
Vanguard FTSE Developed Markets ETF
VEA
$229B
| $86K | ﹤0.01% |
1,800
-3,000
| -63% | -$134K |
|
|
AVDX
5545
PUT
DELISTED
AvidXchange
AVDX
| $85K | ﹤0.01% |
6,900
+2,800
| +68% | +$28K |
|
5546
CALL
Fresenius Medical Care
FMS
$13.8B
| $85K | ﹤0.01% |
4,100
-100
| -2% | -$1.92K |
|
5547
CALL
CGI
GIB
$15.1B
| $85K | ﹤0.01% |
800
-5,700
| -88% | -$578K |
|
5548
PUT
Puma Biotechnology
PBYI
$404M
| $85K | ﹤0.01% |
19,700
+15,800
| +405% | +$52.3K |
|
5549
CALL
Replimune Group
REPL
$941M
| $85K | ﹤0.01% |
10,100
-105,200
| -91% | -$1.22M |
|
5550
CALL
SFL Corp
SFL
$1.64B
| $85K | ﹤0.01% |
7,600
-9,600
| -56% | -$107K |
|
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.