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 | |
|---|---|---|---|---|---|---|
276
PUT
Robinhood
HOOD
$93.8B
| $58.9M | 0.03% |
2,515,900
-413,900
| -14% | -$8.72M |
|
277
PUT
Mercado Libre
MELI
$91.2B
| $58.1M | 0.03% |
28,300
-300
| -1% | -$565K |
|
278
PUT
Newmont
NEM
$102B
| $57.8M | 0.03% |
1,081,300
-701,200
| -39% | -$34.8M |
|
|
B
279
CALL
Barrick Mining
B
$62.8B
| $57.5M | 0.03% |
2,890,300
+149,700
| +5% | +$2.85M |
|
280
PUT
ServiceNow
NOW
$98.4B
| $57.2M | 0.03% |
320,000
-218,500
| -41% | -$35.9M |
|
281
PUT
Baidu
BIDU
$36.6B
| $56.9M | 0.03% |
540,800
+18,400
| +4% | +$1.63M |
|
282
PUT
Ulta Beauty
ULTA
$20.8B
| $56.6M | 0.03% |
145,400
-10,000
| -6% | -$3.75M |
|
|
SCHW
283
CALL
Charles Schwab
SCHW
$175B
| $55.9M | 0.03% |
861,900
-39,700
| -4% | -$2.61M |
|
284
CALL
Accenture
ACN
$85.7B
| $55.8M | 0.03% |
158,000
-28,200
| -15% | -$9.27M |
|
285
CALL
DuPont de Nemours
DD
$18.9B
| $55.6M | 0.03% |
497,120
+125,634
| +34% | +$12.8M |
|
286
CALL
W.W. Grainger
GWW
$63.9B
| $55.2M | 0.03% |
53,100
+26,100
| +97% | +$25.3M |
|
287
CALL
Affirm
AFRM
$24.8B
| $55M | 0.03% |
1,347,600
+436,300
| +48% | +$14.5M |
|
288
CALL
T-Mobile US
TMUS
$207B
| $54.9M | 0.03% |
265,800
+13,900
| +6% | +$2.66M |
|
289
CALL
Analog Devices
ADI
$188B
| $54.5M | 0.03% |
236,800
+69,700
| +42% | +$15.7M |
|
290
CALL
Merck
MRK
$315B
| $53.8M | 0.03% |
473,900
-192,200
| -29% | -$22.8M |
|
291
CALL
Unity
U
$12.8B
| $53.7M | 0.03% |
2,375,300
+744,800
| +46% | +$12.9M |
|
292
CALL
Abbott
ABT
$175B
| $53.7M | 0.03% |
471,000
-84,500
| -15% | -$9.27M |
|
293
PUT
Delta Air Lines
DAL
$54.9B
| $53.7M | 0.03% |
1,057,100
-445,600
| -30% | -$19.4M |
|
294
PUT
MetLife
MET
$60B
| $53.5M | 0.03% |
648,900
-17,500
| -3% | -$1.31M |
|
295
CALL
American Airlines Group
AAL
$9.78B
| $52.4M | 0.03% |
4,662,800
+1,418,300
| +44% | +$15M |
|
296
CALL
Cameco
CCJ
$39.4B
| $52M | 0.03% |
1,089,300
+536,300
| +97% | +$23.4M |
|
297
PUT
Rivian
RIVN
$24.9B
| $52M | 0.03% |
4,636,100
-319,300
| -6% | -$4.59M |
|
298
CALL
FedEx
FDX
$76.6B
| $51.9M | 0.03% |
189,800
-182,600
| -49% | -$53M |
|
299
CALL
Scorpio Tankers
STNG
$3.9B
| $51.8M | 0.03% |
725,900
+103,600
| +17% | +$7.57M |
|
300
CALL
Charter Communications
CHTR
$15.9B
| $51.2M | 0.03% |
158,000
+14,200
| +10% | +$4.78M |
|
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.