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 | |
|---|---|---|---|---|---|---|
5076
CALL
Relmada Therapeutics
RLMD
$539M
| $116K | ﹤0.01% |
36,100
+29,700
| +464% | +$96.2K |
|
5077
SITE Centers
SITC
$225M
| $116K | ﹤0.01% |
+9,890
| New | +$116K |
|
5078
Sonoco
SON
$5.55B
| $116K | ﹤0.01% |
2,141
-88
| -4% | -$4.6K |
|
5079
CALL
SPS Commerce
SPSC
$2.77B
| $116K | ﹤0.01% |
600
-1,500
| -71% | -$294K |
|
5080
PUT
Atomera
ATOM
$201M
| $115K | ﹤0.01% |
43,900
-1,700
| -4% | -$5.3K |
|
5081
Direxion Daily CSI China Internet Index Bull 2X ETF
CWEB
$248M
| $115K | ﹤0.01% |
+2,564
| New | +$75.7K |
|
5082
CALL
Roundhill Ball Metaverse ETF
METV
$210M
| $115K | ﹤0.01% |
8,700
-2,300
| -21% | -$29.6K |
|
5083
PUT
Power Integrations
POWI
$3.44B
| $115K | ﹤0.01% |
1,800
-400
| -18% | -$26.4K |
|
5084
PUT
Perdoceo Education
PRDO
$1.99B
| $115K | ﹤0.01% |
5,200
+4,500
| +643% | +$101K |
|
5085
CALL
RE/MAX Holdings
RMAX
$198M
| $115K | ﹤0.01% |
+9,300
| New | +$96.1K |
|
5086
CALL
Scilex Holding
SCLX
$46.4M
| $115K | ﹤0.01% |
3,560
+1,091
| +44% | +$52.3K |
|
|
SFIX
5087
Stitch Fix
SFIX
$542M
| $115K | ﹤0.01% |
41,005
+35,049
| +588% | +$136K |
|
5088
CALL
Savara
SVRA
$1.11B
| $115K | ﹤0.01% |
27,300
-20,200
| -43% | -$89.2K |
|
5089
PUT
Xponential Fitness
XPOF
$271M
| $115K | ﹤0.01% |
9,300
-24,700
| -73% | -$363K |
|
|
TGR
5090
CALL
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $115K | ﹤0.01% |
1,700
-100
| -6% | -$6.76K |
|
5091
AnaptysBio
ANAB
$1.56B
| $114K | ﹤0.01% |
+3,423
| New | +$117K |
|
5092
CALL
ARKO Corp
ARKO
$886M
| $114K | ﹤0.01% |
16,300
+10,500
| +181% | +$66.3K |
|
|
FRGE
5093
CALL
DELISTED
Forge Global Holdings
FRGE
| $114K | ﹤0.01% |
5,807
-133
| -2% | -$2.77K |
|
5094
CALL
Ituran Location and Control
ITRN
$1.11B
| $114K | ﹤0.01% |
4,300
+300
| +8% | +$7.99K |
|
5095
PUT
LENSAR
LNSR
$64.1M
| $114K | ﹤0.01% |
25,100
-24,600
| -49% | -$114K |
|
5096
CALL
Pennant Group
PNTG
$1.39B
| $114K | ﹤0.01% |
3,200
| – | – |
|
5097
CALL
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.55B
| $114K | ﹤0.01% |
600
-1,200
| -67% | -$227K |
|
5098
PUT
SandRidge Energy
SD
$504M
| $114K | ﹤0.01% |
9,400
-5,100
| -35% | -$65.2K |
|
|
5099
CALL
Sonoco
SON
$5.55B
| $114K | ﹤0.01% |
2,100
+1,700
| +425% | +$88.9K |
|
5100
CALL
Visteon
VC
$2.76B
| $114K | ﹤0.01% |
1,200
+1,000
| +500% | +$102K |
|
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.