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 | |
|---|---|---|---|---|---|---|
|
MTTR
3776
CALL
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $424K | ﹤0.01% |
94,300
-10,800
| -10% | -$47.1K |
|
|
LILM
3777
CALL
DELISTED
Lilium N.V. Class A Ordinary Shares
LILM
| $424K | ﹤0.01% |
548,800
+407,300
| +288% | +$329K |
|
3778
CALL
Frontier Group Holdings
ULCC
$1.4B
| $423K | ﹤0.01% |
79,200
-1,200
| -1% | -$4.69K |
|
3779
CALL
Aquestive Therapeutics
AQST
$468M
| $422K | ﹤0.01% |
84,900
-71,700
| -46% | -$279K |
|
3780
BuzzFeed
BZFD
$94.1M
| $421K | ﹤0.01% |
158,072
+14,665
| +10% | +$39.1K |
|
3781
CALL
Krispy Kreme
DNUT
$562M
| $421K | ﹤0.01% |
39,200
-22,200
| -36% | -$242K |
|
|
DX
3782
CALL
Dynex Capital
DX
$3B
| $421K | ﹤0.01% |
33,000
+15,800
| +92% | +$195K |
|
3783
CALL
Group 1 Automotive
GPI
$4.01B
| $421K | ﹤0.01% |
1,100
-35,100
| -97% | -$12.1M |
|
3784
PUT
PAR Technology
PAR
$682M
| $421K | ﹤0.01% |
8,100
+4,700
| +138% | +$244K |
|
3785
-1x Short VIX Futures ETF
SVIX
$168M
| $421K | ﹤0.01% |
15,580
-9,210
| -37% | -$320K |
|
|
GLDD
3786
CALL
DELISTED
Great Lakes Dredge & Dock
GLDD
| $420K | ﹤0.01% |
39,900
-9,100
| -19% | -$84.6K |
|
3787
PUT
Hamilton Lane
HLNE
$3.83B
| $420K | ﹤0.01% |
+2,500
| New | +$362K |
|
3788
PUT
RBC Bearings
RBC
$18.5B
| $419K | ﹤0.01% |
+1,400
| New | +$403K |
|
3789
PUT
UroGen Pharma
URGN
$2.02B
| $419K | ﹤0.01% |
33,000
-30,600
| -48% | -$454K |
|
3790
PUT
Ezcorp Inc
EZPW
$1.87B
| $418K | ﹤0.01% |
+37,300
| New | +$407K |
|
3791
CALL
FTAI Infrastructure
FIP
$490M
| $418K | ﹤0.01% |
44,700
+11,500
| +35% | +$107K |
|
|
HIMX
3792
Himax Technologies
HIMX
$2.22B
| $418K | ﹤0.01% |
76,065
-18,811
| -20% | -$119K |
|
3793
PUT
Natera
NTRA
$37B
| $418K | ﹤0.01% |
3,300
-3,000
| -48% | -$344K |
|
3794
CALL
Spectrum Brands
SPB
$2.04B
| $418K | ﹤0.01% |
4,400
-1,900
| -30% | -$168K |
|
3795
PUT
Blue Bird Corp
BLBD
$2.41B
| $417K | ﹤0.01% |
8,700
+700
| +9% | +$34.6K |
|
3796
Healthpeak Properties
DOC
$15.5B
| $417K | ﹤0.01% |
+18,238
| New | +$393K |
|
3797
CALL
National Beverage
FIZZ
$2.93B
| $417K | ﹤0.01% |
8,900
+4,900
| +123% | +$233K |
|
3798
Corning
GLW
$123B
| $417K | ﹤0.01% |
9,252
+8,149
| +739% | +$343K |
|
3799
CALL
abrdn Physical Gold Shares ETF
SGOL
$6.97B
| $417K | ﹤0.01% |
16,600
+13,400
| +419% | +$317K |
|
3800
Beyond Meat
BYND
$283M
| $416K | ﹤0.01% |
+61,462
| New | +$389K |
|
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.