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 | |
|---|---|---|---|---|---|---|
1251
CALL
State Street
STT
$50.9B
| $7.07M | ﹤0.01% |
79,900
+16,300
| +26% | +$1.34M |
|
|
UCD
1252
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.07M | ﹤0.01% |
174,200
-33,200
| -16% | -$1.35M |
|
1253
CALL
Guidewire Software
GWRE
$11.5B
| $7.01M | ﹤0.01% |
38,300
+11,600
| +43% | +$1.76M |
|
1254
CALL
Lincoln National
LNC
$7.91B
| $7M | ﹤0.01% |
222,200
+69,200
| +45% | +$2.16M |
|
1255
CALL
Crown Holdings
CCK
$12.8B
| $7M | ﹤0.01% |
73,000
+48,600
| +199% | +$4.19M |
|
1256
Netflix
NFLX
$292B
| $6.99M | ﹤0.01% |
98,570
+61,640
| +167% | +$4.12M |
|
1257
PUT
ProShares UltraShort Health Care
RXD
$3.25M
| $6.99M | ﹤0.01% |
119,300
+8,850
| +8% | +$174K |
|
1258
PUT
Gold Fields
GFI
$29.2B
| $6.98M | ﹤0.01% |
454,900
+91,800
| +25% | +$1.42M |
|
1259
PUT
Zions Bancorporation
ZION
$10.1B
| $6.97M | ﹤0.01% |
147,700
-102,600
| -41% | -$4.86M |
|
1260
PUT
Vail Resorts
MTN
$5.19B
| $6.97M | ﹤0.01% |
40,000
+11,900
| +42% | +$2.13M |
|
1261
CALL
Scotiabank
BNS
$106B
| $6.96M | ﹤0.01% |
127,700
-33,000
| -21% | -$1.6M |
|
1262
PUT
GSK
GSK
$103B
| $6.94M | ﹤0.01% |
169,800
-19,500
| -10% | -$798K |
|
1263
VF Corp
VFC
$6.68B
| $6.93M | ﹤0.01% |
347,374
-107,839
| -24% | -$1.81M |
|
1264
PUT
Cognizant
CTSH
$21.5B
| $6.92M | ﹤0.01% |
89,700
-2,000
| -2% | -$149K |
|
1265
CALL
CRISPR Therapeutics
CRSP
$4.58B
| $6.92M | ﹤0.01% |
147,300
-43,600
| -23% | -$2.21M |
|
1266
CALL
Brinker International
EAT
$8.02B
| $6.92M | ﹤0.01% |
90,400
+23,000
| +34% | +$1.58M |
|
1267
PUT
Bausch Health
BHC
$1.65B
| $6.91M | ﹤0.01% |
846,600
+385,400
| +84% | +$2.54M |
|
1268
CALL
Conagra Brands
CAG
$7.07B
| $6.91M | ﹤0.01% |
212,400
+99,600
| +88% | +$3.05M |
|
1269
Intuit
INTU
$81.1B
| $6.88M | ﹤0.01% |
11,078
+10,177
| +1,130% | +$6.5M |
|
1270
CALL
Teladoc Health
TDOC
$1.58B
| $6.88M | ﹤0.01% |
749,400
+379,800
| +103% | +$3.14M |
|
1271
CALL
Golar LNG
GLNG
$4.95B
| $6.88M | ﹤0.01% |
187,100
+27,400
| +17% | +$916K |
|
1272
PUT
Shift4
FOUR
$3.84B
| $6.85M | ﹤0.01% |
77,300
-88,300
| -53% | -$6.69M |
|
1273
PUT
Expeditors International
EXPD
$22.9B
| $6.84M | ﹤0.01% |
52,100
+49,600
| +1,984% | +$6.07M |
|
1274
CALL
TeraWulf
WULF
$9.15B
| $6.84M | ﹤0.01% |
1,462,500
+276,700
| +23% | +$1.26M |
|
1275
PUT
Academy Sports + Outdoors
ASO
$2.89B
| $6.84M | ﹤0.01% |
117,200
-38,600
| -25% | -$2.11M |
|
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.