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 | |
|---|---|---|---|---|---|---|
201
PUT
Humana
HUM
$47.7B
| $83M | 0.05% |
261,900
+32,100
| +14% | +$11.4M |
|
202
PUT
Cisco
CSCO
$442B
| $82.9M | 0.05% |
1,557,500
-562,300
| -27% | -$27.3M |
|
203
CALL
Lowe's Companies
LOW
$115B
| $82.4M | 0.05% |
304,400
+57,300
| +23% | +$13.9M |
|
204
CALL
American Express
AXP
$238B
| $82.1M | 0.05% |
302,900
-4,000
| -1% | -$996K |
|
205
CALL
Newmont
NEM
$102B
| $81.6M | 0.05% |
1,527,300
-153,600
| -9% | -$7.63M |
|
206
CALL
Occidental Petroleum
OXY
$57.2B
| $81.5M | 0.05% |
1,582,200
-285,200
| -15% | -$16.3M |
|
207
PUT
McDonald's
MCD
$187B
| $81.3M | 0.05% |
267,000
-5,000
| -2% | -$1.38M |
|
208
CALL
lululemon athletica
LULU
$12.9B
| $80.7M | 0.05% |
297,500
+10,900
| +4% | +$2.89M |
|
209
CALL
PepsiCo
PEP
$185B
| $79.4M | 0.05% |
467,000
-6,700
| -1% | -$1.15M |
|
210
CALL
Delta Air Lines
DAL
$54.9B
| $79.1M | 0.05% |
1,557,900
+312,000
| +25% | +$13.6M |
|
211
CALL
Danaher
DHR
$127B
| $78M | 0.05% |
291,600
+165,000
| +130% | +$43.7M |
|
212
PUT
IBM
IBM
$194B
| $77.6M | 0.05% |
350,900
-147,300
| -30% | -$28.9M |
|
213
CALL
Constellation Energy
CEG
$98.2B
| $77M | 0.05% |
296,200
+116,600
| +65% | +$23.2M |
|
214
CALL
Proshares UltraShort Technology
REW
$3.3M
| $76.5M | 0.04% |
1,777,600
+645,075
| +57% | +$31M |
|
215
CALL
Carnival Corporation Ltd
CCL
$35.7B
| $76.1M | 0.04% |
4,119,800
+418,100
| +11% | +$7.08M |
|
|
216
CALL
Humana
HUM
$47.7B
| $76M | 0.04% |
240,000
+62,200
| +35% | +$22.1M |
|
217
CALL
United Airlines
UAL
$38B
| $74.1M | 0.04% |
1,299,100
+549,800
| +73% | +$25.5M |
|
|
218
PUT
PepsiCo
PEP
$185B
| $74.1M | 0.04% |
435,600
-148,500
| -25% | -$25.5M |
|
219
CALL
Arista Networks
ANET
$220B
| $73.1M | 0.04% |
761,600
-128,400
| -14% | -$11.2M |
|
|
UWC
220
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $72.9M | 0.04% |
978,800
+98,000
| +11% | +$7.3M |
|
|
221
PUT
lululemon athletica
LULU
$12.9B
| $72.1M | 0.04% |
265,800
-19,600
| -7% | -$5.2M |
|
|
222
PUT
Carnival Corporation Ltd
CCL
$35.7B
| $72M | 0.04% |
3,898,200
+629,700
| +19% | +$10.7M |
|
223
PUT
Verizon
VZ
$185B
| $72M | 0.04% |
1,603,800
+141,100
| +10% | +$5.89M |
|
224
CALL
Blackstone
BX
$150B
| $71.9M | 0.04% |
469,500
+33,400
| +8% | +$4.63M |
|
225
CALL
Workday
WDAY
$32.7B
| $71.6M | 0.04% |
310,100
-54,800
| -15% | -$12.9M |
|
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.