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 | |
|---|---|---|---|---|---|---|
1076
PUT
NetEase
NTES
$76.4B
| $9.34M | 0.01% |
99,900
+21,100
| +27% | +$1.84M |
|
1077
CALL
Travelers Companies
TRV
$80.1B
| $9.34M | 0.01% |
39,900
+25,200
| +171% | +$5.56M |
|
|
CYBR
1078
PUT
DELISTED
CyberArk
CYBR
| $9.33M | 0.01% |
32,000
-16,500
| -34% | -$4.46M |
|
1079
PUT
W.W. Grainger
GWW
$64.3B
| $9.32M | 0.01% |
34,200
+28,700
| +522% | +$27.8M |
|
1080
CALL
CarMax
KMX
$8.34B
| $9.32M | 0.01% |
120,400
-33,700
| -22% | -$2.66M |
|
|
DENT
1081
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $9.29M | 0.01% |
1,352,200
+306,800
| +29% | +$2.11M |
|
1082
Direxion Daily FTSE China Bull 3X ETF
YINN
$657M
| $9.28M | 0.01% |
251,177
+175,170
| +230% | +$4.02M |
|
1083
CALL
Motorola Solutions
MSI
$67.7B
| $9.26M | 0.01% |
20,600
-900
| -4% | -$375K |
|
1084
CALL
Barclays
BCS
$93.9B
| $9.25M | 0.01% |
761,400
+84,500
| +12% | +$989K |
|
1085
CALL
Genuine Parts
GPC
$16.6B
| $9.23M | 0.01% |
66,100
+36,800
| +126% | +$5.11M |
|
1086
CALL
Enovix
ENVX
$890M
| $9.23M | 0.01% |
1,129,029
-738,971
| -40% | -$7.67M |
|
1087
CALL
Sherwin-Williams
SHW
$77.7B
| $9.2M | 0.01% |
24,100
+13,500
| +127% | +$4.71M |
|
1088
CALL
Ginkgo Bioworks
DNA
$497M
| $9.17M | 0.01% |
1,125,600
+1,104,112
| +5,138% | +$11.1M |
|
1089
CALL
Carlyle Group
CG
$16.1B
| $9.17M | 0.01% |
212,900
-5,900
| -3% | -$248K |
|
1090
CALL
Virgin Galactic
SPCE
$323M
| $9.16M | 0.01% |
1,502,300
+9,400
| +0.6% | +$62.8K |
|
1091
PUT
BILL Holdings
BILL
$4.21B
| $9.15M | 0.01% |
173,400
-40,800
| -19% | -$2.1M |
|
1092
CALL
Molson Coors Class B
TAP
$7.57B
| $9.11M | 0.01% |
158,300
-26,100
| -14% | -$1.4M |
|
1093
PUT
Star Bulk Carriers
SBLK
$3.07B
| $9.09M | 0.01% |
383,700
+344,600
| +881% | +$7.65M |
|
1094
CALL
Whirlpool
WHR
$2.35B
| $9.06M | 0.01% |
84,700
-113,000
| -57% | -$11.4M |
|
1095
CALL
The Mosaic Company
MOS
$7.15B
| $9.05M | 0.01% |
337,900
+90,100
| +36% | +$2.48M |
|
1096
PUT
Kraft Heinz
KHC
$30.1B
| $9.04M | 0.01% |
257,400
-101,000
| -28% | -$3.47M |
|
|
CTRA
1097
CALL
DELISTED
Coterra Energy
CTRA
| $9.04M | 0.01% |
377,300
+3,900
| +1% | +$96.2K |
|
1098
CALL
Advance Auto Parts
AAP
$3.22B
| $9.03M | 0.01% |
231,600
-16,500
| -7% | -$875K |
|
1099
PUT
Sphere Entertainment
SPHR
$4.84B
| $9.02M | 0.01% |
204,200
+124,200
| +155% | +$5.35M |
|
|
WCC
1100
PUT
WESCO International
WCC
$16B
| $9.02M | 0.01% |
53,700
-14,500
| -21% | -$2.35M |
|
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.