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 | |
|---|---|---|---|---|---|---|
301
PUT
Gilead Sciences
GILD
$162B
| $51M | 0.03% |
608,300
+5,700
| +0.9% | +$435K |
|
302
CALL
TJX Companies
TJX
$172B
| $50.4M | 0.03% |
429,000
+95,800
| +29% | +$11M |
|
303
PUT
Vertiv
VRT
$116B
| $50.2M | 0.03% |
504,400
-78,300
| -13% | -$6.49M |
|
304
CALL
Datadog
DDOG
$87.5B
| $50.1M | 0.03% |
435,100
-95,300
| -18% | -$11.1M |
|
305
PUT
Coca-Cola
KO
$354B
| $49.8M | 0.03% |
791,600
+107,200
| +16% | +$7.34M |
|
|
306
Boeing
BA
$164B
| $49.5M | 0.03% |
+325,328
| New | +$55.8M |
|
307
CALL
ARK Space & Defense Innovation ETF
ARKX
$817M
| $49.3M | 0.03% |
1,274,700
-775,600
| -38% | -$11.7M |
|
308
CALL
Comcast
CMCSA
$84B
| $49.3M | 0.03% |
1,179,900
-359,400
| -23% | -$14.2M |
|
309
PUT
DraftKings
DKNG
$11.3B
| $49.2M | 0.03% |
1,256,300
-268,600
| -18% | -$9.7M |
|
310
CALL
Dollar Tree
DLTR
$23.5B
| $48.4M | 0.03% |
688,800
+474,900
| +222% | +$43.3M |
|
311
CALL
Royal Caribbean
RCL
$76.7B
| $48.4M | 0.03% |
273,000
-82,700
| -23% | -$13.4M |
|
312
CALL
Best Buy
BBY
$18.4B
| $48.2M | 0.03% |
466,500
-106,200
| -19% | -$9.57M |
|
313
KraneShares CSI China Internet ETF
KWEB
$5.23B
| $47.9M | 0.03% |
1,408,501
+427,383
| +44% | +$11.5M |
|
314
PUT
Fortinet
FTNT
$114B
| $47.8M | 0.03% |
616,100
-15,800
| -3% | -$1.08M |
|
315
CALL
Coupang
CPNG
$28.1B
| $47.2M | 0.03% |
1,922,900
-29,400
| -2% | -$654K |
|
316
CALL
Estee Lauder
EL
$29.9B
| $46.8M | 0.03% |
469,400
+248,700
| +113% | +$23.6M |
|
|
317
PUT
Comcast
CMCSA
$84B
| $46.7M | 0.03% |
1,119,000
-97,600
| -8% | -$3.85M |
|
318
CALL
Medtronic
MDT
$105B
| $46.7M | 0.03% |
518,500
+175,600
| +51% | +$14.8M |
|
319
CALL
Eaton
ETN
$158B
| $46.5M | 0.03% |
140,200
-26,100
| -16% | -$7.97M |
|
320
CALL
Zoom
ZM
$25.2B
| $46.2M | 0.03% |
662,300
+155,100
| +31% | +$9.69M |
|
321
PUT
Accenture
ACN
$85.7B
| $46.2M | 0.03% |
130,600
-28,000
| -18% | -$9.21M |
|
322
CALL
GE Vernova
GEV
$265B
| $45.9M | 0.03% |
180,100
+144,100
| +400% | +$27.7M |
|
323
CALL
Moderna
MRNA
$23B
| $45.9M | 0.03% |
686,700
-2,800
| -0.4% | -$257K |
|
324
CALL
Global Payments
GPN
$21.6B
| $45.2M | 0.03% |
441,400
+325,800
| +282% | +$33.8M |
|
|
325
PUT
Dollar Tree
DLTR
$23.5B
| $45.2M | 0.03% |
642,400
+374,200
| +140% | +$34.1M |
|
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.