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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3376
CALL
iRhythm Holdings
IRTC
$3.69B
| $645K | ﹤0.01% |
6,000
-1,900
| -24% | -$194K |
|
3377
Mitek Systems
MITK
$768M
| $645K | ﹤0.01% |
57,779
+36,325
| +169% | +$465K |
|
|
ITCI
3378
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $645K | ﹤0.01% |
9,430
-4,223
| -31% | -$293K |
|
3379
CALL
Frontline
FRO
$8.59B
| $644K | ﹤0.01% |
25,000
-60,900
| -71% | -$1.55M |
|
3380
TC Energy
TRP
$71.2B
| $644K | ﹤0.01% |
+17,011
| New | +$645K |
|
3381
PUT
Camden Property Trust
CPT
$11.2B
| $643K | ﹤0.01% |
5,900
+5,600
| +1,867% | +$578K |
|
3382
PUT
Illumina
ILMN
$28.7B
| $643K | ﹤0.01% |
75,800
+6,924
| +10% | +$777K |
|
3383
PUT
IMAX
IMAX
$2.47B
| $643K | ﹤0.01% |
38,400
-3,800
| -9% | -$62.9K |
|
3384
TETRA Technologies
TTI
$1.14B
| $643K | ﹤0.01% |
186,010
+101,444
| +120% | +$405K |
|
|
AY
3385
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $643K | ﹤0.01% |
29,310
+17,034
| +139% | +$357K |
|
3386
CALL
Arcosa
ACA
$7.14B
| $642K | ﹤0.01% |
7,700
-23,400
| -75% | -$1.95M |
|
|
ESPR
3387
CALL
DELISTED
Esperion Therapeutics
ESPR
| $642K | ﹤0.01% |
289,500
-289,300
| -50% | -$681K |
|
3388
Jacobs Solutions
J
$16B
| $642K | ﹤0.01% |
+5,564
| New | +$653K |
|
3389
CALL
Opko Health
OPK
$936M
| $641K | ﹤0.01% |
513,100
+160,900
| +46% | +$209K |
|
3390
PUT
RCI Hospitality Holdings
RICK
$201M
| $640K | ﹤0.01% |
14,700
+2,700
| +23% | +$131K |
|
3391
CALL
Home BancShares
HOMB
$6.21B
| $639K | ﹤0.01% |
26,700
+26,500
| +13,250% | +$629K |
|
3392
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.67B
| $638K | ﹤0.01% |
27,500
+6,800
| +33% | +$159K |
|
3393
CALL
Lufax Holding
LU
$1.27B
| $638K | ﹤0.01% |
269,600
+199,400
| +284% | +$760K |
|
3394
CALL
Crane Co
CR
$13.1B
| $637K | ﹤0.01% |
4,400
-3,000
| -41% | -$425K |
|
3395
CALL
Endava
DAVA
$147M
| $637K | ﹤0.01% |
21,800
+4,300
| +25% | +$128K |
|
3396
CALL
Newell Brands
NWL
$2.2B
| $637K | ﹤0.01% |
99,400
+53,700
| +118% | +$400K |
|
3397
Freshpet
FRPT
$2.92B
| $636K | ﹤0.01% |
4,916
-3,897
| -44% | -$468K |
|
3398
PUT
RadNet
RDNT
$4.84B
| $636K | ﹤0.01% |
10,800
+7,500
| +227% | +$407K |
|
|
HIBB
3399
PUT
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $636K | ﹤0.01% |
7,300
+700
| +11% | +$58K |
|
3400
PUT
Bank of N.T. Butterfield & Son
NTB
$2.4B
| $635K | ﹤0.01% |
18,100
+100
| +0.6% | +$3.35K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.