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 | |
|---|---|---|---|---|---|---|
3651
CALL
Consensus Cloud Solutions
CCSI
$670M
| $425K | ﹤0.01% |
9,000
+400
| +5% | +$20.6K |
|
3652
Geron
GERN
$828M
| $425K | ﹤0.01% |
+181,914
| New | +$407K |
|
3653
PUT
Leggett & Platt
LEG
$1.34B
| $425K | ﹤0.01% |
12,800
+9,600
| +300% | +$365K |
|
|
ENLC
3654
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $425K | ﹤0.01% |
47,900
-14,100
| -23% | -$135K |
|
3655
United States 12 Month Oil Fund,
USL
$45.1M
| $424K | ﹤0.01% |
13,061
-6,483
| -33% | -$237K |
|
3656
CALL
Dolby
DLB
$5.56B
| $423K | ﹤0.01% |
6,500
-79,900
| -92% | -$5.94M |
|
3657
abrdn Physical Silver Shares ETF
SIVR
$4.02B
| $423K | ﹤0.01% |
23,194
+20,032
| +634% | +$370K |
|
|
NETI
3658
CALL
DELISTED
Eneti Inc.
NETI
| $423K | ﹤0.01% |
63,500
-15,000
| -19% | -$107K |
|
3659
Nu Holdings
NU
$69.2B
| $422K | ﹤0.01% |
+95,950
| New | +$440K |
|
3660
PUT
Amphenol
APH
$198B
| $421K | ﹤0.01% |
12,600
-199,400
| -94% | -$7.24M |
|
3661
Boeing
BA
$171B
| $421K | ﹤0.01% |
3,482
-65,997
| -95% | -$10.1M |
|
3662
Celanese
CE
$4.9B
| $421K | ﹤0.01% |
4,668
+3,950
| +550% | +$434K |
|
3663
PUT
Cheniere Energy
CQP
$31.9B
| $421K | ﹤0.01% |
7,900
+7,300
| +1,217% | +$366K |
|
3664
CALL
Sturm, Ruger & Co
RGR
$594M
| $421K | ﹤0.01% |
8,300
-8,400
| -50% | -$485K |
|
3665
CALL
SSR Mining
SSRM
$5.32B
| $420K | ﹤0.01% |
28,600
-61,500
| -68% | -$926K |
|
3666
CALL
Mohawk Industries
MHK
$7.5B
| $419K | ﹤0.01% |
4,600
-4,200
| -48% | -$487K |
|
3667
Southern Copper
SCCO
$143B
| $419K | ﹤0.01% |
+10,097
| New | +$447K |
|
|
QLTB
3668
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $419K | ﹤0.01% |
5,100
-3,300
| -39% | -$271K |
|
3669
EXL Service
EXLS
$5.14B
| $418K | ﹤0.01% |
14,195
-65,895
| -82% | -$2.15M |
|
3670
Huntington Bancshares
HBAN
$34.4B
| $418K | ﹤0.01% |
31,723
-48,772
| -61% | -$652K |
|
3671
PUT
CenterPoint Energy
CNP
$27.7B
| $417K | ﹤0.01% |
14,800
-3,800
| -20% | -$119K |
|
|
FXLV
3672
CALL
DELISTED
F45 Training Holdings Inc.
FXLV
| $417K | ﹤0.01% |
135,200
+129,300
| +2,192% | +$341K |
|
|
3673
PUT
Sturm, Ruger & Co
RGR
$594M
| $416K | ﹤0.01% |
8,200
+6,600
| +413% | +$381K |
|
|
JNPR
3674
PUT
DELISTED
Juniper Networks
JNPR
| $415K | ﹤0.01% |
15,900
-21,800
| -58% | -$615K |
|
3675
State Street Technology Select Sector SPDR ETF
XLK
$115B
| $415K | ﹤0.01% |
7,000
+920
| +15% | +$62.8K |
|
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.