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
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
HOUS
7276
DELISTED
Anywhere Real Estate
HOUS
| $13K | ﹤0.01% |
+2,174
| New | +$15.7K |
|
7277
PUT
Herc Holdings
HRI
$4.84B
| $13K | ﹤0.01% |
100
-200
| -67% | -$24.6K |
|
7278
iShares Genomics Immunology and Healthcare ETF
IDNA
$192M
| $13K | ﹤0.01% |
542
-101
| -16% | -$2.71K |
|
7279
Immunome
IMNM
$2.59B
| $13K | ﹤0.01% |
5,970
+2,328
| +64% | +$9.38K |
|
7280
Iris Energy
IREN
$13.1B
| $13K | ﹤0.01% |
10,618
+10,440
| +5,865% | +$24.8K |
|
7281
PUT
JELD-WEN Holding
JELD
$115M
| $13K | ﹤0.01% |
1,400
-900
| -39% | -$8.73K |
|
7282
Lucid Motors
LCID
$3.08B
| $13K | ﹤0.01% |
200
-700
| -78% | -$77K |
|
7283
LCI Industries
LCII
$2.46B
| $13K | ﹤0.01% |
142
+73
| +106% | +$7.17K |
|
7284
Live Oak Bancshares
LOB
$1.96B
| $13K | ﹤0.01% |
433
-159
| -27% | -$5.08K |
|
7285
PUT
LG Display
LPL
$3.02B
| $13K | ﹤0.01% |
2,700
-1,700
| -39% | -$8.64K |
|
7286
PUT
Mercury Systems
MRCY
$5.79B
| $13K | ﹤0.01% |
300
-200
| -40% | -$9.46K |
|
|
MVO
7287
PUT
DELISTED
MV Oil Trust
MVO
| $13K | ﹤0.01% |
800
-700
| -47% | -$9.49K |
|
|
NAK
7288
PUT
Northern Dynasty Minerals
NAK
$784M
| $13K | ﹤0.01% |
62,600
-19,000
| -23% | -$4.59K |
|
7289
Nektar Therapeutics
NKTR
$2.38B
| $13K | ﹤0.01% |
408
-879
| -68% | -$42.5K |
|
7290
Nkarta
NKTX
$150M
| $13K | ﹤0.01% |
+2,203
| New | +$22.2K |
|
7291
CALL
New Mountain Finance
NMFC
$653M
| $13K | ﹤0.01% |
1,100
-7,900
| -88% | -$97.3K |
|
7292
PUT
Plains GP Holdings
PAGP
$5.14B
| $13K | ﹤0.01% |
1,100
-26,200
| -96% | -$327K |
|
7293
CALL
PennantPark Floating Rate Capital
PFLT
$696M
| $13K | ﹤0.01% |
1,200
-30,300
| -96% | -$332K |
|
7294
PUT
Piper Sandler
PIPR
$5.07B
| $13K | ﹤0.01% |
+400
| New | +$13.1K |
|
|
BCIC
7295
PUT
BCP Investment Corp
BCIC
$89.5M
| $13K | ﹤0.01% |
600
-200
| -25% | -$4.27K |
|
7296
PUT
Construction Partners
ROAD
$5.75B
| $13K | ﹤0.01% |
500
+400
| +400% | +$11.5K |
|
7297
CALL
Repay Holdings
RPAY
$325M
| $13K | ﹤0.01% |
1,700
+200
| +13% | +$1.44K |
|
7298
PUT
Retractable Technologies
RVP
$20.1M
| $13K | ﹤0.01% |
8,200
-200,800
| -96% | -$427K |
|
7299
PUT
SGHC Ltd
SGHC
$7.05B
| $13K | ﹤0.01% |
4,600
-2,400
| -34% | -$8.5K |
|
7300
PUT
Silicon Laboratories
SLAB
$7.16B
| $13K | ﹤0.01% |
100
-800
| -89% | -$105K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.