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 | |
|---|---|---|---|---|---|---|
4326
PUT
Coursera
COUR
$1.77B
| $315K | ﹤0.01% |
22,500
+18,600
| +477% | +$316K |
|
4327
CALL
Woodside Energy
WDS
$44.2B
| $315K | ﹤0.01% |
15,800
+1,700
| +12% | +$34.4K |
|
4328
CALL
Banco Bradesco
BBD
$37.4B
| $314K | ﹤0.01% |
109,900
-354,460
| -76% | -$1.06M |
|
4329
CALL
TaskUs
TASK
$594M
| $314K | ﹤0.01% |
27,000
+20,600
| +322% | +$257K |
|
4330
Warby Parker
WRBY
$3.19B
| $314K | ﹤0.01% |
23,119
-36,664
| -61% | -$487K |
|
4331
PUT
United Parks & Resorts
PRKS
$2.19B
| $314K | ﹤0.01% |
5,600
+3,300
| +143% | +$167K |
|
4332
Eldorado Gold
EGO
$8.33B
| $313K | ﹤0.01% |
+22,306
| New | +$271K |
|
|
MGIC
4333
PUT
DELISTED
Magic Software Enterprises
MGIC
| $313K | ﹤0.01% |
+27,400
| New | +$295K |
|
4334
PUT
SSR Mining
SSRM
$5.19B
| $313K | ﹤0.01% |
70,300
+39,900
| +131% | +$278K |
|
4335
Atomera
ATOM
$173M
| $312K | ﹤0.01% |
50,679
+40,321
| +389% | +$276K |
|
|
CPRX
4336
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $312K | ﹤0.01% |
19,600
+16,400
| +513% | +$247K |
|
4337
Danaher
DHR
$138B
| $312K | ﹤0.01% |
1,253
-22,859
| -95% | -$5.58M |
|
|
GPMT
4338
Granite Point Mortgage Trust
GPMT
$63.7M
| $312K | ﹤0.01% |
+65,504
| New | +$340K |
|
4339
CALL
Honda
HMC
$39.8B
| $312K | ﹤0.01% |
8,400
-7,500
| -47% | -$258K |
|
4340
CALL
Harmony Biosciences
HRMY
$2.08B
| $312K | ﹤0.01% |
9,300
-1,900
| -17% | -$61K |
|
4341
PUT
Akebia Therapeutics
AKBA
$338M
| $311K | ﹤0.01% |
170,200
+160,900
| +1,730% | +$257K |
|
4342
CALL
Ashland
ASH
$3.34B
| $311K | ﹤0.01% |
3,200
+800
| +33% | +$71.7K |
|
4343
B2Gold
BTG
$4.98B
| $311K | ﹤0.01% |
119,194
+12,069
| +11% | +$32.6K |
|
4344
PUT
Tenable Holdings
TENB
$3.47B
| $311K | ﹤0.01% |
6,300
-8,200
| -57% | -$389K |
|
|
LAR
4345
PUT
Lithium Argentina AG
LAR
$906M
| $311K | ﹤0.01% |
57,700
+27,300
| +90% | +$133K |
|
4346
CALL
Diodes
DIOD
$3.5B
| $310K | ﹤0.01% |
4,400
+100
| +2% | +$6.94K |
|
|
NOTV
4347
CALL
DELISTED
Inotiv
NOTV
| $310K | ﹤0.01% |
+28,400
| New | +$170K |
|
4348
RCI Hospitality Holdings
RICK
$202M
| $310K | ﹤0.01% |
5,345
-4,471
| -46% | -$263K |
|
4349
PUT
Rollins
ROL
$18.6B
| $310K | ﹤0.01% |
6,700
-30,100
| -82% | -$1.33M |
|
4350
Revolution Medicines
RVMD
$38.5B
| $310K | ﹤0.01% |
9,649
+1,147
| +13% | +$34K |
|
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.