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 | |
|---|---|---|---|---|---|---|
351
PUT
Ford
F
$57.5B
| $41.6M | 0.02% |
3,939,700
+378,100
| +11% | +$4.33M |
|
352
CALL
Ulta Beauty
ULTA
$20.8B
| $41.2M | 0.02% |
105,900
-36,300
| -26% | -$13.6M |
|
353
CALL
GameStop
GME
$9.69B
| $40.9M | 0.02% |
1,781,700
-14,600
| -0.8% | -$334K |
|
354
CALL
Deere & Co
DE
$164B
| $40.7M | 0.02% |
97,500
-24,900
| -20% | -$9.39M |
|
355
PUT
e.l.f. Beauty
ELF
$4.66B
| $40.6M | 0.02% |
372,500
+80,600
| +28% | +$12.6M |
|
356
PUT
RTX Corp
RTX
$262B
| $40.5M | 0.02% |
334,600
-515,500
| -61% | -$58.8M |
|
357
CALL
Akamai
AKAM
$18.1B
| $40.1M | 0.02% |
397,700
+16,000
| +4% | +$1.56M |
|
358
CALL
Stryker
SYK
$119B
| $40.1M | 0.02% |
111,100
+16,800
| +18% | +$5.8M |
|
359
PUT
Abbott
ABT
$175B
| $40M | 0.02% |
351,200
-21,100
| -6% | -$2.31M |
|
360
PUT
RH
RH
$3.31B
| $40M | 0.02% |
119,600
-153,500
| -56% | -$42.3M |
|
361
CALL
Intuit
INTU
$77.8B
| $40M | 0.02% |
64,400
+22,700
| +54% | +$14.5M |
|
362
CALL
Archer Daniels Midland
ADM
$42.1B
| $39.8M | 0.02% |
665,500
-121,800
| -15% | -$7.42M |
|
363
CALL
Dick's Sporting Goods
DKS
$18.8B
| $39.6M | 0.02% |
189,900
-35,200
| -16% | -$7.52M |
|
364
PUT
EOG Resources
EOG
$76.7B
| $39.6M | 0.02% |
322,400
-102,400
| -24% | -$12.9M |
|
365
PUT
KKR & Co
KKR
$85.8B
| $39.6M | 0.02% |
302,900
+82,300
| +37% | +$9.74M |
|
366
CALL
Devon Energy
DVN
$51.8B
| $39.5M | 0.02% |
1,009,700
-379,900
| -27% | -$16.7M |
|
367
CALL
Agnico Eagle Mines
AEM
$73.5B
| $39.4M | 0.02% |
488,600
+10,500
| +2% | +$813K |
|
368
PUT
Marathon Digital Holdings
MARA
$4.73B
| $39.2M | 0.02% |
2,418,500
+108,200
| +5% | +$1.96M |
|
369
CALL
Kroger
KR
$35.3B
| $39.2M | 0.02% |
683,800
-235,000
| -26% | -$12.6M |
|
370
Advanced Micro Devices
AMD
$901B
| $39.2M | 0.02% |
238,757
+132,734
| +125% | +$20.2M |
|
371
PUT
Sea Limited
SE
$64.2B
| $39.1M | 0.02% |
414,600
-109,800
| -21% | -$8.29M |
|
372
PUT
VanEck Durable High Dividend ETF
DURA
$38.5M
| $38.8M | 0.02% |
138,700
-88,300
| -39% | -$2.95M |
|
373
PUT
ConocoPhillips
COP
$145B
| $38.7M | 0.02% |
367,400
-215,700
| -37% | -$23.7M |
|
374
CALL
NIO
NIO
$11.7B
| $38.6M | 0.02% |
5,784,900
+1,738,600
| +43% | +$7.99M |
|
375
PUT
Workday
WDAY
$32.7B
| $38.5M | 0.02% |
174,500
-180,600
| -51% | -$42.7M |
|
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.