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 | |
|---|---|---|---|---|---|---|
1676
CALL
Insulet
PODD
$11.3B
| $3.96M | ﹤0.01% |
17,000
-7,500
| -31% | -$1.54M |
|
1677
PUT
Signet Jewelers
SIG
$3.55B
| $3.95M | ﹤0.01% |
38,300
-5,400
| -12% | -$456K |
|
1678
Regeneron Pharmaceuticals
REGN
$68.8B
| $3.94M | ﹤0.01% |
3,749
-1,288
| -26% | -$1.43M |
|
1679
Zillow
Z
$7.04B
| $3.94M | ﹤0.01% |
61,677
-20,397
| -25% | -$1.1M |
|
1680
PUT
Deutsche Bank
DB
$66.3B
| $3.93M | ﹤0.01% |
226,900
+66,300
| +41% | +$1.06M |
|
1681
PUT
Sunoco
SUN
$14.2B
| $3.92M | ﹤0.01% |
73,100
+19,000
| +35% | +$1.03M |
|
1682
PUT
Exelon
EXC
$48.6B
| $3.92M | ﹤0.01% |
96,700
+46,200
| +91% | +$1.74M |
|
|
HUT
1683
PUT
Hut 8
HUT
$12.4B
| $3.92M | ﹤0.01% |
319,600
-256,100
| -44% | -$3.41M |
|
1684
PUT
Invesco
IVZ
$13.3B
| $3.92M | ﹤0.01% |
223,100
+9,000
| +4% | +$148K |
|
1685
CALL
Blue Owl Capital
OWL
$6.39B
| $3.9M | ﹤0.01% |
201,500
+134,700
| +202% | +$2.41M |
|
1686
PUT
Galicia Financial Group
GGAL
$7.92B
| $3.9M | ﹤0.01% |
92,600
+24,200
| +35% | +$842K |
|
1687
PUT
Plug Power
PLUG
$2.92B
| $3.89M | ﹤0.01% |
1,721,600
-1,020,100
| -37% | -$2.29M |
|
1688
Ciena
CIEN
$55.3B
| $3.89M | ﹤0.01% |
63,157
+9,522
| +18% | +$502K |
|
1689
CALL
Stanley Black & Decker
SWK
$14.2B
| $3.89M | ﹤0.01% |
35,300
-58,400
| -62% | -$5.61M |
|
1690
SLB Ltd
SLB
$77.8B
| $3.88M | ﹤0.01% |
92,473
-6,034
| -6% | -$269K |
|
1691
Li Auto
LI
$12.6B
| $3.88M | ﹤0.01% |
151,074
-39,831
| -21% | -$809K |
|
1692
PUT
Vipshop
VIPS
$6.84B
| $3.87M | ﹤0.01% |
246,100
+175,000
| +246% | +$2.34M |
|
1693
CALL
CDW
CDW
$17.1B
| $3.87M | ﹤0.01% |
17,100
-21,000
| -55% | -$4.66M |
|
1694
CALL
Range Resources
RRC
$9.11B
| $3.87M | ﹤0.01% |
125,800
+8,600
| +7% | +$266K |
|
1695
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $3.87M | ﹤0.01% |
44,600
+3,200
| +8% | +$225K |
|
1696
PUT
TripAdvisor
TRIP
$1.59B
| $3.86M | ﹤0.01% |
266,400
+20,000
| +8% | +$310K |
|
1697
Viking Therapeutics
VKTX
$4.04B
| $3.86M | ﹤0.01% |
60,981
-20,326
| -25% | -$1.19M |
|
1698
CALL
SharkNinja
SN
$21B
| $3.86M | ﹤0.01% |
35,500
-101,300
| -74% | -$8.81M |
|
1699
Petrobras
PBR
$121B
| $3.84M | ﹤0.01% |
266,803
-89,327
| -25% | -$1.31M |
|
1700
PUT
Otis Worldwide
OTIS
$27.4B
| $3.83M | ﹤0.01% |
36,900
+21,600
| +141% | +$2.06M |
|
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.