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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
LTC
3426
CALL
LTC Properties
LTC
$2.13B
| $516K | ﹤0.01% |
13,800
-13,500
| -49% | -$562K |
|
3427
CALL
Outdoor Holding Co
POWW
$249M
| $516K | ﹤0.01% |
176,400
-24,100
| -12% | -$103K |
|
3428
Smith & Wesson
SWBI
$649M
| $516K | ﹤0.01% |
+49,793
| New | +$658K |
|
3429
CALL
USA Compression Partners
USAC
$3.69B
| $516K | ﹤0.01% |
29,700
+10,800
| +57% | +$191K |
|
|
MOMO
3430
PUT
Hello Group
MOMO
$867M
| $515K | ﹤0.01% |
111,600
-129,900
| -54% | -$622K |
|
3431
CALL
Radian Group
RDN
$5.28B
| $515K | ﹤0.01% |
26,700
-47,100
| -64% | -$1M |
|
3432
CALL
Shoals Technologies Group
SHLS
$1.33B
| $515K | ﹤0.01% |
23,900
+9,100
| +61% | +$203K |
|
3433
CALL
BGC Group
BGC
$5.64B
| $514K | ﹤0.01% |
163,800
-43,200
| -21% | -$167K |
|
3434
Tanger
SKT
$4.78B
| $514K | ﹤0.01% |
37,575
-9,430
| -20% | -$147K |
|
3435
PUT
Sun Communities
SUI
$15.8B
| $514K | ﹤0.01% |
3,800
+2,700
| +245% | +$427K |
|
3436
CALL
Shift4
FOUR
$4.45B
| $513K | ﹤0.01% |
11,500
-20,600
| -64% | -$865K |
|
|
THS
3437
CALL
DELISTED
Treehouse Foods
THS
| $513K | ﹤0.01% |
12,100
+11,200
| +1,244% | +$502K |
|
3438
PUT
MannKind Corp
MNKD
$1.19B
| $512K | ﹤0.01% |
166,000
+124,600
| +301% | +$470K |
|
3439
Sprout Social
SPT
$530M
| $511K | ﹤0.01% |
+8,422
| New | +$506K |
|
3440
CALL
Cactus
WHD
$3.63B
| $511K | ﹤0.01% |
13,300
+100
| +0.8% | +$4.01K |
|
3441
PUT
C3.ai
AI
$1.38B
| $510K | ﹤0.01% |
40,800
-77,000
| -65% | -$1.38M |
|
3442
Fortuna Silver Mines
FSM
$2.54B
| $510K | ﹤0.01% |
202,766
+73,345
| +57% | +$187K |
|
|
DAY
3443
DELISTED
Dayforce
DAY
| $510K | ﹤0.01% |
9,138
-7,178
| -44% | -$419K |
|
|
SBOW
3444
PUT
DELISTED
SilverBow Resources, Inc.
SBOW
| $510K | ﹤0.01% |
19,000
+14,100
| +288% | +$512K |
|
3445
Ametek
AME
$53.9B
| $509K | ﹤0.01% |
+4,489
| New | +$538K |
|
3446
PUT
FIVE9
FIVN
$2.08B
| $509K | ﹤0.01% |
6,800
-7,800
| -53% | -$758K |
|
3447
CALL
Magnolia Oil & Gas
MGY
$5.93B
| $509K | ﹤0.01% |
25,700
+3,400
| +15% | +$75.3K |
|
3448
CALL
Microvast
MVST
$237M
| $509K | ﹤0.01% |
281,500
-197,200
| -41% | -$471K |
|
3449
CALL
Ultragenyx Pharmaceutical
RARE
$2.46B
| $509K | ﹤0.01% |
12,300
+12,000
| +4,000% | +$617K |
|
3450
PUT
American Vanguard Corp
AVD
$68.7M
| $508K | ﹤0.01% |
27,200
-1,000
| -4% | -$20.8K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.