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 | |
|---|---|---|---|---|---|---|
4526
PUT
Brookfield Infrastructure Partners
BIP
$19.6B
| $229K | ﹤0.01% |
7,300
+4,700
| +181% | +$127K |
|
4527
Bakkt Inc
BKKT
$306M
| $229K | ﹤0.01% |
4,113
+3,127
| +317% | +$108K |
|
4528
Lightwave Logic
LWLG
$823M
| $229K | ﹤0.01% |
46,058
+28,487
| +162% | +$134K |
|
4529
Veracyte
VCYT
$4.45B
| $229K | ﹤0.01% |
8,353
+4,676
| +127% | +$113K |
|
4530
CALL
Varex Imaging
VREX
$462M
| $229K | ﹤0.01% |
+11,200
| New | +$214K |
|
4531
PUT
Advanced Energy
AEIS
$10.1B
| $228K | ﹤0.01% |
2,100
+1,800
| +600% | +$175K |
|
4532
CALL
Buckle
BKE
$2.32B
| $228K | ﹤0.01% |
4,800
-1,000
| -17% | -$37.8K |
|
4533
PUT
Cooper-Standard Automotive
CPS
$517M
| $228K | ﹤0.01% |
11,700
-5,200
| -31% | -$83K |
|
4534
PUT
Transmedics
TMDX
$2.7B
| $228K | ﹤0.01% |
2,900
-300
| -9% | -$18.1K |
|
4535
CALL
Brookfield Renewable
BEPC
$5.86B
| $227K | ﹤0.01% |
7,900
-15,500
| -66% | -$395K |
|
4536
PUT
B2Gold
BTG
$4.98B
| $227K | ﹤0.01% |
72,000
+6,800
| +10% | +$21.4K |
|
4537
PUT
Compass Minerals
CMP
$1.23B
| $227K | ﹤0.01% |
9,000
+2,100
| +30% | +$53.6K |
|
4538
MeiraGTx Holdings
MGTX
$1.08B
| $227K | ﹤0.01% |
+32,414
| New | +$160K |
|
4539
iShares MSCI USA Momentum Factor ETF
MTUM
$23.6B
| $227K | ﹤0.01% |
+1,447
| New | +$212K |
|
|
STKL
4540
DELISTED
SunOpta
STKL
| $227K | ﹤0.01% |
41,659
+33,711
| +424% | +$148K |
|
|
VTNR
4541
DELISTED
Vertex Energy, Inc
VTNR
| $227K | ﹤0.01% |
67,224
-42,459
| -39% | -$167K |
|
4542
CALL
DXC Technology
DXC
$1.91B
| $226K | ﹤0.01% |
9,900
-100,100
| -91% | -$2.23M |
|
|
JMIA
4543
CALL
Jumia Technologies
JMIA
$708M
| $226K | ﹤0.01% |
64,100
+26,900
| +72% | +$80.9K |
|
|
KNDI
4544
CALL
Kandi Technologies Group
KNDI
$66.5M
| $226K | ﹤0.01% |
81,000
+3,600
| +5% | +$11K |
|
4545
Avery Dennison
AVY
$12.8B
| $225K | ﹤0.01% |
+1,113
| New | +$208K |
|
4546
Euronet Worldwide
EEFT
$3.19B
| $225K | ﹤0.01% |
2,226
+2,159
| +3,222% | +$184K |
|
4547
4D Molecular Therapeutics
FDMT
$502M
| $225K | ﹤0.01% |
11,110
+10,844
| +4,077% | +$143K |
|
4548
CALL
FingerMotion
FNGR
$14.8M
| $225K | ﹤0.01% |
56,100
-62,300
| -53% | -$308K |
|
|
LAND
4549
PUT
Gladstone Land Corp
LAND
$365M
| $225K | ﹤0.01% |
15,600
+3,100
| +25% | +$44.2K |
|
4550
CALL
Simply Good Foods
SMPL
$907M
| $225K | ﹤0.01% |
5,700
+4,700
| +470% | +$176K |
|
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.