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 | |
|---|---|---|---|---|---|---|
2351
FirstCash
FCFS
$8.55B
| $1.82M | ﹤0.01% |
15,896
+3,796
| +31% | +$430K |
|
2352
PUT
Xerox
XRX
$337M
| $1.82M | ﹤0.01% |
175,400
+44,100
| +34% | +$472K |
|
|
ANSS
2353
CALL
DELISTED
Ansys
ANSS
| $1.82M | ﹤0.01% |
5,700
-100
| -2% | -$31.8K |
|
2354
BJs Wholesale Club
BJ
$11.9B
| $1.81M | ﹤0.01% |
22,013
-30,869
| -58% | -$2.61M |
|
|
RDNW
2355
PUT
RideNow Group
RDNW
$247M
| $1.81M | ﹤0.01% |
378,600
+377,400
| +31,450% | +$1.56M |
|
|
SILV
2356
CALL
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $1.81M | ﹤0.01% |
196,100
+105,500
| +116% | +$934K |
|
2357
CALL
Viatris
VTRS
$20.1B
| $1.81M | ﹤0.01% |
156,100
-11,700
| -7% | -$135K |
|
2358
CALL
Credo Technology Group
CRDO
$39.7B
| $1.81M | ﹤0.01% |
58,800
-38,100
| -39% | -$1.14M |
|
2359
Healthcare Realty
HR
$7.42B
| $1.81M | ﹤0.01% |
99,673
+21,651
| +28% | +$384K |
|
2360
CALL
iShares Convertible Bond ETF
ICVT
$7.23B
| $1.81M | ﹤0.01% |
52,300
-10,800
| -17% | -$867K |
|
2361
PUT
Aspen Aerogels
ASPN
$387M
| $1.81M | ﹤0.01% |
65,300
+9,200
| +16% | +$230K |
|
2362
Groupon
GRPN
$980M
| $1.81M | ﹤0.01% |
184,957
+83,162
| +82% | +$1.11M |
|
2363
PUT
Viridian Therapeutics
VRDN
$2.13B
| $1.81M | ﹤0.01% |
79,500
+76,600
| +2,641% | +$1.25M |
|
|
JPGE
2364
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $1.81M | ﹤0.01% |
30,400
-78,700
| -72% | -$4.68M |
|
2365
PUT
Transmedics
TMDX
$2.5B
| $1.8M | ﹤0.01% |
11,500
+6,900
| +150% | +$1.06M |
|
2366
WEC Energy
WEC
$37.7B
| $1.8M | ﹤0.01% |
18,777
+9,024
| +93% | +$800K |
|
2367
CALL
BWX Technologies
BWXT
$16B
| $1.8M | ﹤0.01% |
16,600
+3,200
| +24% | +$318K |
|
2368
Goldman Sachs
GS
$313B
| $1.8M | ﹤0.01% |
+3,642
| New | +$1.78M |
|
2369
Pentair
PNR
$10.2B
| $1.8M | ﹤0.01% |
+18,438
| New | +$1.58M |
|
2370
PUT
Alliance Resource Partners
ARLP
$3.18B
| $1.8M | ﹤0.01% |
72,000
-2,900
| -4% | -$70.1K |
|
2371
Evolv Technologies
EVLV
$943M
| $1.8M | ﹤0.01% |
444,601
-44,557
| -9% | -$155K |
|
2372
CALL
Fortuna Silver Mines
FSM
$2.59B
| $1.8M | ﹤0.01% |
388,800
-55,600
| -13% | -$264K |
|
2373
CALL
AvePoint
AVPT
$2.6B
| $1.8M | ﹤0.01% |
152,900
+22,500
| +17% | +$246K |
|
2374
CALL
Companhia Siderúrgica Nacional
SID
$1.43B
| $1.8M | ﹤0.01% |
752,300
+492,300
| +189% | +$1.08M |
|
2375
Group 1 Automotive
GPI
$3.94B
| $1.79M | ﹤0.01% |
+4,685
| New | +$1.61M |
|
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.