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 | |
|---|---|---|---|---|---|---|
476
CALL
American International
AIG
$41.5B
| $29.8M | 0.02% |
406,300
-259,800
| -39% | -$19.4M |
|
477
PUT
Northrop Grumman
NOC
$74.6B
| $29.7M | 0.02% |
56,300
-12,000
| -18% | -$5.88M |
|
478
PUT
TJX Companies
TJX
$172B
| $29.7M | 0.02% |
252,900
-54,500
| -18% | -$6.25M |
|
479
CALL
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$135M
| $29.7M | 0.02% |
595,400
+227,800
| +62% | +$4.51M |
|
480
PUT
ON Semiconductor
ON
$35.9B
| $29.6M | 0.02% |
408,200
+29,200
| +8% | +$2.13M |
|
481
CALL
AutoZone
AZO
$48.5B
| $29.6M | 0.02% |
9,400
+4,000
| +74% | +$12.3M |
|
482
PUT
Shell
SHEL
$243B
| $29.6M | 0.02% |
448,300
-35,900
| -7% | -$2.54M |
|
483
PUT
iShares Gold Trust
IAU
$64.2B
| $29.4M | 0.02% |
591,600
+403,000
| +214% | +$18.9M |
|
484
PUT
Atlassian
TEAM
$21.7B
| $29.3M | 0.02% |
184,300
-65,100
| -26% | -$10.7M |
|
485
CALL
Iron Mountain
IRM
$37B
| $29M | 0.02% |
244,200
+38,100
| +18% | +$4.08M |
|
486
CALL
Hewlett Packard
HPE
$63.7B
| $28.9M | 0.02% |
1,414,100
-900,600
| -39% | -$17.2M |
|
487
PUT
Philip Morris
PM
$303B
| $28.9M | 0.02% |
238,000
-6,700
| -3% | -$778K |
|
488
CALL
CME Group
CME
$90.1B
| $28.9M | 0.02% |
130,800
+10,900
| +9% | +$2.26M |
|
489
PUT
Unity
U
$12.8B
| $28.8M | 0.02% |
1,271,300
-82,700
| -6% | -$1.43M |
|
490
CALL
American Tower
AMT
$77.4B
| $28.7M | 0.02% |
123,600
+32,300
| +35% | +$7.16M |
|
|
491
PUT
American Tower
AMT
$77.4B
| $28.7M | 0.02% |
123,500
-22,600
| -15% | -$5.01M |
|
492
PUT
Upstart Holdings
UPST
$2.74B
| $28.7M | 0.02% |
717,500
+97,000
| +16% | +$3.23M |
|
493
PUT
Lamb Weston
LW
$6.63B
| $28.7M | 0.02% |
442,800
+41,200
| +10% | +$2.72M |
|
494
PUT
Cencora
COR
$58.5B
| $28.6M | 0.02% |
127,100
+24,200
| +24% | +$5.62M |
|
495
PUT
Marathon Petroleum
MPC
$92.2B
| $28.6M | 0.02% |
175,400
-21,400
| -11% | -$3.62M |
|
496
CALL
PENN Entertainment
PENN
$2.8B
| $28.5M | 0.02% |
1,510,400
+169,700
| +13% | +$3.23M |
|
497
CALL
Cadence Design Systems
CDNS
$93B
| $28.5M | 0.02% |
105,100
+6,300
| +6% | +$1.74M |
|
498
CALL
eBay
EBAY
$49.3B
| $28.2M | 0.02% |
433,700
-206,100
| -32% | -$11.9M |
|
499
PUT
Coherent
COHR
$61.1B
| $28.2M | 0.02% |
317,100
+211,000
| +199% | +$15.8M |
|
|
500
CALL
Shell
SHEL
$243B
| $28.2M | 0.02% |
427,000
-174,000
| -29% | -$12.3M |
|
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.