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
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3951
PUT
Targa Resources
TRGP
$56.2B
| $273K | ﹤0.01% |
3,600
-3,500
| -49% | -$254K |
|
3952
CALL
Sphere 3D
ANY
$16.8M
| $272K | ﹤0.01% |
14,030
+12,597
| +879% | +$315K |
|
3953
CALL
Quaker Houghton
KWR
$2.67B
| $272K | ﹤0.01% |
+1,400
| New | +$274K |
|
|
SPTN
3954
CALL
DELISTED
SpartanNash
SPTN
| $272K | ﹤0.01% |
12,100
-6,700
| -36% | -$157K |
|
|
FOLD
3955
PUT
DELISTED
Amicus Therapeutics
FOLD
| $271K | ﹤0.01% |
21,600
+11,500
| +114% | +$136K |
|
|
MITT
3956
PUT
TPG Mortgage Investment Trust
MITT
$230M
| $271K | ﹤0.01% |
44,300
+1,900
| +4% | +$10.8K |
|
|
EH
3957
CALL
EHang Holdings
EH
$397M
| $270K | ﹤0.01% |
17,800
-41,100
| -70% | -$476K |
|
3958
Meritage Homes
MTH
$4.89B
| $270K | ﹤0.01% |
+3,796
| New | +$238K |
|
3959
PUT
ATI
ATI
$25.5B
| $269K | ﹤0.01% |
6,100
-15,300
| -71% | -$585K |
|
3960
Lear
LEA
$7.45B
| $269K | ﹤0.01% |
1,878
+75
| +4% | +$9.9K |
|
3961
PUT
ARS Pharmaceuticals
SPRY
$563M
| $269K | ﹤0.01% |
40,200
+25,600
| +175% | +$171K |
|
|
SRCL
3962
CALL
DELISTED
Stericycle Inc
SRCL
| $269K | ﹤0.01% |
5,800
+4,900
| +544% | +$214K |
|
|
NATI
3963
PUT
DELISTED
National Instruments Corp
NATI
| $269K | ﹤0.01% |
4,700
-70,900
| -94% | -$4.06M |
|
3964
CALL
AvePoint
AVPT
$2.74B
| $268K | ﹤0.01% |
46,600
-10,700
| -19% | -$56.4K |
|
3965
PUT
Bit Digital
BTBT
$459M
| $268K | ﹤0.01% |
66,200
+4,300
| +7% | +$11.1K |
|
3966
PUT
Vita Coco
COCO
$3.97B
| $268K | ﹤0.01% |
10,000
+7,100
| +245% | +$173K |
|
3967
PUT
Douglas Emmett
DEI
$2.01B
| $268K | ﹤0.01% |
21,400
-1,900
| -8% | -$23K |
|
|
ESGR
3968
CALL
DELISTED
Enstar Group
ESGR
| $268K | ﹤0.01% |
1,100
| – | – |
|
3969
Simplify Interest Rate Hedge ETF
PFIX
$165M
| $268K | ﹤0.01% |
4,282
-2,399
| -36% | -$154K |
|
3970
CALL
DocGo
DCGO
$62.4M
| $267K | ﹤0.01% |
28,500
-32,100
| -53% | -$282K |
|
3971
CALL
Blue Owl Capital
OWL
$6.63B
| $267K | ﹤0.01% |
23,000
-18,300
| -44% | -$197K |
|
3972
PUT
West Pharmaceutical
WST
$23.7B
| $267K | ﹤0.01% |
700
-500
| -42% | -$179K |
|
3973
Beazer Homes USA
BZH
$913M
| $266K | ﹤0.01% |
9,435
+7,150
| +313% | +$146K |
|
3974
CALL
MarineMax
HZO
$782M
| $266K | ﹤0.01% |
7,800
-8,300
| -52% | -$244K |
|
3975
Renaissance IPO ETF
IPO
$154M
| $266K | ﹤0.01% |
8,141
-43,685
| -84% | -$1.29M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.