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 | |
|---|---|---|---|---|---|---|
2451
CALL
FuboTV Inc
FUBO
$245M
| $1.64M | ﹤0.01% |
96,200
+5,642
| +6% | +$102K |
|
2452
CALL
Huntington Ingalls Industries
HII
$11.3B
| $1.64M | ﹤0.01% |
6,200
-5,700
| -48% | -$1.51M |
|
2453
Hubbell
HUBB
$25.7B
| $1.64M | ﹤0.01% |
3,828
-5,533
| -59% | -$2.13M |
|
2454
PUT
FTI Consulting
FCN
$4.82B
| $1.64M | ﹤0.01% |
7,200
-400
| -5% | -$88.9K |
|
|
GTLS
2455
PUT
DELISTED
Chart Industries
GTLS
| $1.64M | ﹤0.01% |
13,200
-3,600
| -21% | -$473K |
|
2456
PUT
Opko Health
OPK
$921M
| $1.63M | ﹤0.01% |
1,096,600
-59,500
| -5% | -$88.3K |
|
|
CMPS
2457
PUT
Compass Pathways
CMPS
$1.52B
| $1.63M | ﹤0.01% |
258,600
+86,800
| +51% | +$612K |
|
2458
Intellia Therapeutics
NTLA
$1.5B
| $1.62M | ﹤0.01% |
78,994
+38,206
| +94% | +$881K |
|
2459
PUT
Watsco Inc
WSO
$14.9B
| $1.62M | ﹤0.01% |
3,300
+1,800
| +120% | +$865K |
|
2460
PUT
Textron
TXT
$16.6B
| $1.62M | ﹤0.01% |
18,300
+16,800
| +1,120% | +$1.48M |
|
2461
Bausch Health
BHC
$1.65B
| $1.62M | ﹤0.01% |
198,594
+11,514
| +6% | +$75.9K |
|
2462
CALL
MINISO
MNSO
$3.64B
| $1.62M | ﹤0.01% |
92,400
+60,300
| +188% | +$991K |
|
2463
PUT
Pilgrim's Pride
PPC
$6.82B
| $1.62M | ﹤0.01% |
35,200
+9,100
| +35% | +$385K |
|
2464
iRhythm Holdings
IRTC
$3.59B
| $1.62M | ﹤0.01% |
21,805
+20,022
| +1,123% | +$1.59M |
|
2465
PUT
Life Time Group Holdings
LTH
$9.42B
| $1.62M | ﹤0.01% |
66,200
+54,300
| +456% | +$1.22M |
|
2466
CALL
Roper Technologies
ROP
$36.3B
| $1.61M | ﹤0.01% |
2,900
-3,900
| -57% | -$2.14M |
|
2467
PUT
Immunovant
IMVT
$8.09B
| $1.61M | ﹤0.01% |
56,500
-22,200
| -28% | -$655K |
|
2468
TJX Companies
TJX
$170B
| $1.61M | ﹤0.01% |
13,704
-16,742
| -55% | -$1.92M |
|
2469
CALL
Veralto
VLTO
$22.6B
| $1.61M | ﹤0.01% |
82,700
+72,700
| +727% | +$7.68M |
|
|
VRNA
2470
CALL
DELISTED
Verona Pharma
VRNA
| $1.6M | ﹤0.01% |
55,800
-26,200
| -32% | -$645K |
|
2471
CALL
BlackLine
BL
$1.69B
| $1.6M | ﹤0.01% |
29,100
-31,300
| -52% | -$1.54M |
|
2472
Sprott Uranium Miners ETF
URNM
$1.78B
| $1.6M | ﹤0.01% |
34,973
+32,214
| +1,168% | +$1.42M |
|
2473
CALL
Amkor Technology
AMKR
$16.1B
| $1.6M | ﹤0.01% |
52,400
+12,400
| +31% | +$422K |
|
2474
CALL
Madison Square Garden
MSGS
$9.54B
| $1.6M | ﹤0.01% |
7,700
-4,800
| -38% | -$965K |
|
|
SOHU
2475
CALL
Sohu.com
SOHU
$336M
| $1.6M | ﹤0.01% |
101,800
+94,800
| +1,354% | +$1.42M |
|
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.