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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4376
PUT
Corporacion America
CAAP
$4.22B
| $233K | ﹤0.01% |
13,400
-98,700
| -88% | -$1.6M |
|
4377
CALL
Interparfums
IPAR
$4.07B
| $233K | ﹤0.01% |
1,800
-200
| -10% | -$25K |
|
|
4378
PUT
Interparfums
IPAR
$4.07B
| $233K | ﹤0.01% |
+1,800
| New | +$225K |
|
4379
iShares Russell 3000 ETF
IWV
$19.3B
| $233K | ﹤0.01% |
716
+422
| +144% | +$133K |
|
4380
PUT
Tandem Diabetes Care
TNDM
$1.23B
| $233K | ﹤0.01% |
5,500
-13,000
| -70% | -$551K |
|
4381
PUT
Capital Southwest
CSWC
$1.48B
| $232K | ﹤0.01% |
9,200
-11,800
| -56% | -$299K |
|
4382
CryoPort
CYRX
$748M
| $232K | ﹤0.01% |
28,666
+26,576
| +1,272% | +$217K |
|
4383
CALL
Golub Capital BDC
GBDC
$3.37B
| $232K | ﹤0.01% |
15,400
+1,400
| +10% | +$21.1K |
|
4384
ICL Group
ICL
$6.58B
| $232K | ﹤0.01% |
54,762
-202,118
| -79% | -$856K |
|
4385
Ingredion
INGR
$6.49B
| $232K | ﹤0.01% |
+1,694
| New | +$215K |
|
4386
ZTO Express
ZTO
$18.3B
| $232K | ﹤0.01% |
9,406
-52,167
| -85% | -$1.08M |
|
|
AIOT
4387
CALL
PowerFleet Inc
AIOT
$517M
| $232K | ﹤0.01% |
46,500
+23,700
| +104% | +$113K |
|
|
ML
4388
CALL
DELISTED
MoneyLion Inc.
ML
| $232K | ﹤0.01% |
5,600
+5,100
| +1,020% | +$277K |
|
|
COOP
4389
DELISTED
Mr. Cooper
COOP
| $231K | ﹤0.01% |
2,511
+1,698
| +209% | +$150K |
|
4390
PUT
East-West Bancorp
EWBC
$18B
| $231K | ﹤0.01% |
2,800
-2,100
| -43% | -$168K |
|
4391
CALL
HNI Corp
HNI
$3.1B
| $231K | ﹤0.01% |
4,300
| – | – |
|
4392
CALL
Minerals Technologies
MTX
$2.29B
| $231K | ﹤0.01% |
+3,000
| New | +$231K |
|
4393
CALL
Compass Diversified
CODI
$770M
| $230K | ﹤0.01% |
10,400
+2,400
| +30% | +$52.3K |
|
4394
Jazz Pharmaceuticals
JAZZ
$16B
| $230K | ﹤0.01% |
2,071
-1,522
| -42% | -$167K |
|
4395
PUT
Mine Safety
MSA
$6.75B
| $230K | ﹤0.01% |
1,300
| – | – |
|
|
NGD
4396
PUT
DELISTED
New Gold Inc
NGD
| $230K | ﹤0.01% |
79,900
+42,200
| +112% | +$104K |
|
4397
Genco Shipping & Trading
GNK
$1.09B
| $229K | ﹤0.01% |
11,753
+9,238
| +367% | +$172K |
|
4398
Radware
RDWR
$1.08B
| $229K | ﹤0.01% |
10,290
-112,177
| -92% | -$2.31M |
|
4399
CALL
Revvity
RVTY
$12.4B
| $229K | ﹤0.01% |
1,800
-5,800
| -76% | -$682K |
|
|
BASE
4400
CALL
DELISTED
Couchbase
BASE
| $228K | ﹤0.01% |
14,200
-12,900
| -48% | -$223K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.