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 | |
|---|---|---|---|---|---|---|
1176
D.R. Horton
DHI
$40.7B
| $7.98M | ﹤0.01% |
+41,837
| New | +$7.35M |
|
1177
CALL
Darden Restaurants
DRI
$22.5B
| $7.96M | ﹤0.01% |
48,500
-27,800
| -36% | -$4.21M |
|
1178
PUT
Air Products & Chemicals
APD
$66.2B
| $7.95M | ﹤0.01% |
26,700
-29,100
| -52% | -$7.96M |
|
1179
CALL
Charles River Laboratories
CRL
$11B
| $7.94M | ﹤0.01% |
40,300
+10,900
| +37% | +$2.27M |
|
1180
CALL
Boston Properties
BXP
$11B
| $7.92M | ﹤0.01% |
98,500
-20,500
| -17% | -$1.47M |
|
1181
PUT
GitLab
GTLB
$5.26B
| $7.91M | ﹤0.01% |
153,500
-55,100
| -26% | -$2.75M |
|
1182
PUT
SentinelOne
S
$6.18B
| $7.9M | ﹤0.01% |
330,300
-237,800
| -42% | -$5.37M |
|
1183
Wynn Resorts
WYNN
$10B
| $7.88M | ﹤0.01% |
82,211
-16,826
| -17% | -$1.35M |
|
1184
PUT
Vanguard FTSE Europe ETF
VGK
$29.9B
| $7.88M | ﹤0.01% |
134,500
+108,900
| +425% | +$7.49M |
|
1185
Rivian
RIVN
$22.8B
| $7.88M | ﹤0.01% |
701,907
+501,061
| +249% | +$7.2M |
|
1186
CALL
XPO
XPO
$25.2B
| $7.85M | ﹤0.01% |
73,000
-114,900
| -61% | -$12.9M |
|
1187
PUT
Dropbox
DBX
$6.84B
| $7.82M | ﹤0.01% |
307,400
-19,800
| -6% | -$466K |
|
1188
PUT
International Flavors & Fragrances
IFF
$19.5B
| $7.82M | ﹤0.01% |
74,500
-10,800
| -13% | -$1.08M |
|
1189
CALL
First Majestic Silver
AG
$8.03B
| $7.81M | ﹤0.01% |
1,302,300
-11,700
| -0.9% | -$67.8K |
|
1190
PUT
Darling Ingredients
DAR
$9.9B
| $7.79M | ﹤0.01% |
209,600
-106,100
| -34% | -$4M |
|
1191
PUT
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $7.78M | ﹤0.01% |
375,400
-134,100
| -26% | -$12.6M |
|
1192
iShares MSCI China ETF
MCHI
$6.04B
| $7.76M | ﹤0.01% |
152,352
-8,463
| -5% | -$359K |
|
1193
PUT
Post Holdings
POST
$4.14B
| $7.75M | ﹤0.01% |
67,000
-13,400
| -17% | -$1.5M |
|
1194
First Citizens BancShares
FCNCA
$24.7B
| $7.74M | ﹤0.01% |
4,207
+2,265
| +117% | +$4.32M |
|
1195
CALL
Magna International
MGA
$17.8B
| $7.71M | ﹤0.01% |
187,900
+69,900
| +59% | +$2.92M |
|
1196
CALL
Star Bulk Carriers
SBLK
$3.16B
| $7.71M | ﹤0.01% |
325,300
+148,000
| +83% | +$3.28M |
|
1197
CALL
PG&E
PCG
$47.9B
| $7.69M | ﹤0.01% |
389,200
-155,700
| -29% | -$2.91M |
|
1198
PUT
Toyota
TM
$210B
| $7.66M | ﹤0.01% |
42,900
| – | – |
|
1199
Comcast
CMCSA
$79.7B
| $7.66M | ﹤0.01% |
183,370
+79,072
| +76% | +$3.12M |
|
1200
CALL
Forward Air
FWRD
$489M
| $7.63M | ﹤0.01% |
215,500
+151,600
| +237% | +$4.3M |
|
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.