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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5401
Alliant Energy
LNT
$18.3B
| $120K | ﹤0.01% |
2,385
-265
| -10% | -$13K |
|
5402
CALL
Mirum Pharmaceuticals
MIRM
$6.46B
| $120K | ﹤0.01% |
4,800
+1,100
| +30% | +$30.2K |
|
5403
PUT
Amprius Technologies
AMPX
$1.36B
| $119K | ﹤0.01% |
45,000
+36,400
| +423% | +$135K |
|
5404
Bally's
BALY
$682M
| $119K | ﹤0.01% |
8,537
+6,432
| +306% | +$74.9K |
|
|
BLUE
5405
CALL
DELISTED
bluebird bio
BLUE
| $119K | ﹤0.01% |
4,655
-10,290
| -69% | -$264K |
|
5406
CALL
B2Gold
BTG
$5B
| $119K | ﹤0.01% |
45,800
+26,700
| +140% | +$72.1K |
|
5407
CALL
Monte Rosa Therapeutics
GLUE
$1.4B
| $119K | ﹤0.01% |
16,900
+7,300
| +76% | +$43.3K |
|
5408
PUT
Lexicon Pharmaceuticals
LXRX
$1.03B
| $119K | ﹤0.01% |
49,800
+30,600
| +159% | +$65.7K |
|
5409
PUT
Lloyds Banking Group
LYG
$89.5B
| $119K | ﹤0.01% |
46,300
+37,600
| +432% | +$86.3K |
|
5410
PUT
Mercer International
MERC
$42.3M
| $119K | ﹤0.01% |
12,000
-2,300
| -16% | -$20.6K |
|
5411
CALL
Solid Biosciences
SLDB
$794M
| $119K | ﹤0.01% |
+9,000
| New | +$84.2K |
|
5412
The ONE Group
STKS
$56.2M
| $119K | ﹤0.01% |
21,375
+9,064
| +74% | +$39.7K |
|
|
MORF
5413
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $119K | ﹤0.01% |
3,400
+3,213
| +1,718% | +$108K |
|
5414
Cavco Industries
CVCO
$4.22B
| $118K | ﹤0.01% |
298
-108
| -27% | -$38.2K |
|
5415
Delek Logistics
DKL
$3.21B
| $118K | ﹤0.01% |
2,894
+2,634
| +1,013% | +$115K |
|
5416
PUT
Fortis
FTS
$29B
| $118K | ﹤0.01% |
3,000
+2,800
| +1,400% | +$112K |
|
5417
MINISO
MNSO
$3.88B
| $118K | ﹤0.01% |
5,800
-25,418
| -81% | -$486K |
|
5418
CALL
OceanFirst Financial
OCFC
$1.68B
| $118K | ﹤0.01% |
7,200
+6,800
| +1,700% | +$110K |
|
5419
OSI Systems
OSIS
$3.65B
| $118K | ﹤0.01% |
828
-1,649
| -67% | -$216K |
|
5420
PUT
Prosperity Bancshares
PB
$8.97B
| $118K | ﹤0.01% |
1,800
+1,100
| +157% | +$70.1K |
|
|
SLRN
5421
CALL
DELISTED
ACELYRIN
SLRN
| $118K | ﹤0.01% |
17,500
-13,700
| -44% | -$104K |
|
5422
WisdomTree
WT
$2.96B
| $118K | ﹤0.01% |
12,869
+4,899
| +61% | +$37.5K |
|
|
MTTR
5423
CALL
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $118K | ﹤0.01% |
52,300
-10,800
| -17% | -$23.7K |
|
5424
AAR Corp
AIR
$5.59B
| $117K | ﹤0.01% |
+1,967
| New | +$122K |
|
5425
CALL
Ezcorp Inc
EZPW
$1.83B
| $117K | ﹤0.01% |
10,400
+400
| +4% | +$3.94K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.