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 | |
|---|---|---|---|---|---|---|
6401
PUT
Tidewater
TDW
$3.73B
| $52K | ﹤0.01% |
2,400
-800
| -25% | -$17.1K |
|
6402
CALL
FlexShares Morningstar US Market Factors Tilt Index Fund
TILT
$2.19B
| $52K | ﹤0.01% |
1,400
+500
| +56% | +$76.8K |
|
6403
iShares Broad USD High Yield Corporate Bond ETF
USHY
$29.3B
| $52K | ﹤0.01% |
+1,572
| New | +$55.9K |
|
|
COUP
6404
DELISTED
Coupa Software Incorporated
COUP
| $52K | ﹤0.01% |
890
| – | – |
|
|
IELG
6405
PUT
DELISTED
ISHARES ENHANCED U.S. LARGE CAP ETF
IELG
| $52K | ﹤0.01% |
1,100
-600
| -35% | -$28.4K |
|
|
AZEK
6406
PUT
DELISTED
The AZEK Co
AZEK
| $51K | ﹤0.01% |
3,100
-4,900
| -61% | -$93.2K |
|
6407
PUT
Azenta
AZTA
$1.3B
| $51K | ﹤0.01% |
1,200
+300
| +33% | +$17.9K |
|
6408
PUT
Bright Horizons
BFAM
$3.92B
| $51K | ﹤0.01% |
+900
| New | +$68.5K |
|
6409
PUT
Corcept Therapeutics
CORT
$12.4B
| $51K | ﹤0.01% |
2,000
+1,400
| +233% | +$37.5K |
|
6410
PUT
Dynagas LNG Partners
DLNG
$132M
| $51K | ﹤0.01% |
18,000
+7,000
| +64% | +$23.6K |
|
6411
Gold Royalty Corp
GROY
$600M
| $51K | ﹤0.01% |
20,214
-22,623
| -53% | -$60.6K |
|
6412
CALL
Fusion Fuel Green
HTOO
$18.7M
| $51K | ﹤0.01% |
294
-535
| -65% | -$132K |
|
6413
CALL
Immunocore
IMCR
$1.72B
| $51K | ﹤0.01% |
1,100
-1,100
| -50% | -$52.4K |
|
6414
CALL
Immunic
IMUX
$190M
| $51K | ﹤0.01% |
1,620
-980
| -38% | -$41K |
|
6415
PUT
indie Semiconductor
INDI
$682M
| $51K | ﹤0.01% |
7,100
+1,600
| +29% | +$11.8K |
|
6416
PUT
OFS Capital
OFS
$45M
| $51K | ﹤0.01% |
6,300
-2,000
| -24% | -$20.7K |
|
6417
Roivant Sciences
ROIV
$24.5B
| $51K | ﹤0.01% |
15,890
-24,064
| -60% | -$93.2K |
|
6418
PUT
Rapid7
RPD
$645M
| $51K | ﹤0.01% |
1,200
-4,000
| -77% | -$247K |
|
6419
CALL
Saratoga Investment
SAR
$312M
| $51K | ﹤0.01% |
2,500
+100
| +4% | +$2.4K |
|
6420
PUT
Stellus Capital Investment Corp
SCM
$217M
| $51K | ﹤0.01% |
4,300
+4,200
| +4,200% | +$54.5K |
|
6421
CALL
Spire Global
SPIR
$444M
| $51K | ﹤0.01% |
6,013
-4,025
| -40% | -$43.6K |
|
6422
PUT
Tilly's
TLYS
$116M
| $51K | ﹤0.01% |
7,400
+6,700
| +957% | +$50.9K |
|
6423
Televisa
TV
$1.48B
| $51K | ﹤0.01% |
+9,606
| New | +$67.4K |
|
|
UROY
6424
CALL
Uranium Royalty Corp
UROY
$1.3B
| $51K | ﹤0.01% |
22,900
+2,000
| +10% | +$5.27K |
|
|
UROY
6425
Uranium Royalty Corp
UROY
$1.3B
| $51K | ﹤0.01% |
23,000
-9,077
| -28% | -$23.9K |
|
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.