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 | |
|---|---|---|---|---|---|---|
426
CVS Health
CVS
$138B
| $33.8M | 0.02% |
538,186
+206,064
| +62% | +$12M |
|
427
CALL
Cleveland-Cliffs
CLF
$5.39B
| $33.7M | 0.02% |
2,641,100
+544,000
| +26% | +$7.39M |
|
428
PUT
Global Payments
GPN
$21.6B
| $33.7M | 0.02% |
328,700
+22,000
| +7% | +$2.28M |
|
429
CALL
Corning
GLW
$133B
| $33.6M | 0.02% |
745,300
-179,000
| -19% | -$7.53M |
|
430
CALL
Energy Transfer Partners
ET
$70.1B
| $33.6M | 0.02% |
2,090,800
+182,900
| +10% | +$2.94M |
|
431
CALL
United Rentals
URI
$64.8B
| $33.5M | 0.02% |
41,400
+19,600
| +90% | +$14.1M |
|
|
432
Apple
AAPL
$4.79T
| $33.3M | 0.02% |
+143,113
| New | +$32M |
|
433
PUT
Best Buy
BBY
$18.4B
| $33.1M | 0.02% |
320,500
-138,500
| -30% | -$12.5M |
|
434
PUT
eBay
EBAY
$49.3B
| $33.1M | 0.02% |
507,900
+68,700
| +16% | +$3.95M |
|
435
PUT
Zscaler
ZS
$23B
| $32.9M | 0.02% |
192,600
-105,900
| -35% | -$19.3M |
|
436
CALL
Northrop Grumman
NOC
$74.6B
| $32.9M | 0.02% |
62,300
-33,000
| -35% | -$16.2M |
|
437
CALL
DoorDash
DASH
$77.4B
| $32.9M | 0.02% |
230,300
-180,600
| -44% | -$21.9M |
|
438
CALL
Kraft Heinz
KHC
$30.8B
| $32.9M | 0.02% |
936,100
-157,900
| -14% | -$5.43M |
|
439
CALL
Southern Company
SO
$108B
| $32.8M | 0.02% |
364,200
-145,200
| -29% | -$12.4M |
|
440
PUT
Chubb
CB
$133B
| $32.8M | 0.02% |
113,700
+2,300
| +2% | +$631K |
|
441
PUT
Applovin
APP
$139B
| $32.8M | 0.02% |
251,000
-53,600
| -18% | -$4.89M |
|
442
PUT
Regeneron Pharmaceuticals
REGN
$68.3B
| $32.5M | 0.02% |
30,900
+6,600
| +27% | +$7.34M |
|
443
CALL
D.R. Horton
DHI
$40.4B
| $32.3M | 0.02% |
169,500
+10,700
| +7% | +$1.88M |
|
444
CALL
Teva Pharmaceuticals
TEVA
$35.1B
| $32.3M | 0.02% |
1,791,100
+245,000
| +16% | +$4.29M |
|
445
CALL
Rivian
RIVN
$24.9B
| $32.3M | 0.02% |
2,876,300
-2,457,200
| -46% | -$35.3M |
|
446
PUT
Norwegian Cruise Line
NCLH
$8.87B
| $32.2M | 0.02% |
1,569,900
+30,200
| +2% | +$548K |
|
447
PUT
Pinterest
PINS
$12.6B
| $32M | 0.02% |
988,300
+154,300
| +19% | +$5.24M |
|
448
CALL
Caesars Entertainment
CZR
$6.1B
| $32M | 0.02% |
766,400
+223,200
| +41% | +$8.37M |
|
449
CALL
Bilibili
BILI
$7.4B
| $31.8M | 0.02% |
1,358,300
-2,200
| -0.2% | -$34.1K |
|
450
CALL
Williams Companies
WMB
$91.1B
| $31.6M | 0.02% |
692,300
-37,700
| -5% | -$1.66M |
|
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.