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 | |
|---|---|---|---|---|---|---|
|
QLTB
2501
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $1.15M | ﹤0.01% |
11,100
-20,700
| -65% | -$2.15M |
|
2502
CALL
Tower Semiconductor
TSEM
$25.3B
| $1.15M | ﹤0.01% |
26,200
-100
| -0.4% | -$4.61K |
|
2503
National Grid
NGG
$81.6B
| $1.15M | ﹤0.01% |
+24,090
| New | +$1.45M |
|
2504
CALL
Assurant
AIZ
$13.7B
| $1.15M | ﹤0.01% |
7,900
+4,300
| +119% | +$702K |
|
2505
BGC Group
BGC
$5.65B
| $1.15M | ﹤0.01% |
365,382
+179,504
| +97% | +$695K |
|
|
NARI
2506
PUT
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $1.15M | ﹤0.01% |
15,800
+14,500
| +1,115% | +$1.08M |
|
2507
Box
BOX
$4.18B
| $1.15M | ﹤0.01% |
46,997
+8,579
| +22% | +$236K |
|
|
SCHW
2508
Charles Schwab
SCHW
$181B
| $1.15M | ﹤0.01% |
+15,950
| New | +$1.11M |
|
2509
Liberty Global Class A
LBTYA
$3.35B
| $1.15M | ﹤0.01% |
+73,488
| New | +$1.48M |
|
2510
Quanterix
QTRX
$173M
| $1.15M | ﹤0.01% |
103,913
+102,418
| +6,851% | +$1.3M |
|
2511
FTAI Aviation
FTAI
$22B
| $1.14M | ﹤0.01% |
+76,349
| New | +$1.32M |
|
2512
CALL
United States Brent Oil Fund
BNO
$755M
| $1.14M | ﹤0.01% |
41,800
-81,300
| -66% | -$2.44M |
|
2513
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$19M
| $1.14M | ﹤0.01% |
+5,606
| New | +$831K |
|
2514
CALL
Credit Acceptance
CACC
$5.78B
| $1.14M | ﹤0.01% |
2,600
-2,200
| -46% | -$1.16M |
|
|
MRTX
2515
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.14M | ﹤0.01% |
16,300
-112,800
| -87% | -$8.35M |
|
|
ERF
2516
CALL
DELISTED
Enerplus Corporation
ERF
| $1.14M | ﹤0.01% |
80,200
+3,000
| +4% | +$42.1K |
|
2517
Tapestry
TPR
$29.8B
| $1.14M | ﹤0.01% |
+39,953
| New | +$1.34M |
|
|
XIFR
2518
PUT
XPLR Infrastructure LP
XIFR
$1.19B
| $1.14M | ﹤0.01% |
15,700
-1,500
| -9% | -$120K |
|
2519
Kornit Digital
KRNT
$713M
| $1.13M | ﹤0.01% |
+42,626
| New | +$1.23M |
|
|
DM
2520
DELISTED
Desktop Metal, Inc.
DM
| $1.13M | ﹤0.01% |
43,769
-10,833
| -20% | -$303K |
|
2521
CALL
XP
XP
$8.65B
| $1.13M | ﹤0.01% |
59,500
-14,500
| -20% | -$288K |
|
2522
CALL
Valaris
VAL
$5.43B
| $1.13M | ﹤0.01% |
23,100
+19,200
| +492% | +$920K |
|
2523
CALL
DocGo
DCGO
$62.2M
| $1.13M | ﹤0.01% |
113,800
+104,500
| +1,124% | +$944K |
|
2524
CALL
Magna International
MGA
$18.3B
| $1.13M | ﹤0.01% |
23,800
-112,100
| -82% | -$6.53M |
|
2525
Ciena
CIEN
$53.4B
| $1.13M | ﹤0.01% |
+27,899
| New | +$1.34M |
|
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.