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 | |
|---|---|---|---|---|---|---|
751
CALL
Celsius Holdings
CELH
$7.28B
| $13M | 0.01% |
261,900
-167,100
| -39% | -$6.64M |
|
752
PUT
Equinix
EQIX
$101B
| $13M | 0.01% |
16,600
+400
| +2% | +$293K |
|
753
CALL
Molina Healthcare
MOH
$11.6B
| $13M | 0.01% |
43,200
+31,200
| +260% | +$8.97M |
|
754
PUT
Wingstop
WING
$3.76B
| $13M | 0.01% |
65,000
-2,100
| -3% | -$410K |
|
755
PUT
Sherwin-Williams
SHW
$78.9B
| $12.9M | 0.01% |
48,600
+9,500
| +24% | +$2.24M |
|
756
PUT
Robinhood
HOOD
$93.8B
| $12.8M | 0.01% |
1,286,000
-132,400
| -9% | -$1.23M |
|
757
CALL
Unilever
UL
$133B
| $12.8M | 0.01% |
218,044
-29,600
| -12% | -$1.76M |
|
758
PUT
Cheniere Energy
LNG
$56B
| $12.8M | 0.01% |
83,900
-79,700
| -49% | -$11.8M |
|
759
PUT
e.l.f. Beauty
ELF
$4.66B
| $12.8M | 0.01% |
111,900
+80,800
| +260% | +$7.78M |
|
760
CALL
VF Corp
VFC
$6.74B
| $12.8M | 0.01% |
669,600
+238,000
| +55% | +$4.88M |
|
761
CALL
Ross Stores
ROST
$76.4B
| $12.8M | 0.01% |
113,900
-10,300
| -8% | -$1.08M |
|
762
CALL
MSCI
MSCI
$41.5B
| $12.7M | 0.01% |
27,100
+10,800
| +66% | +$5.27M |
|
763
PUT
Seagate
STX
$205B
| $12.7M | 0.01% |
205,400
-84,000
| -29% | -$5.13M |
|
764
PUT
Nutrien
NTR
$32.9B
| $12.6M | 0.01% |
214,200
+14,400
| +7% | +$917K |
|
765
PUT
Riot Platforms
RIOT
$8.84B
| $12.6M | 0.01% |
1,068,200
+554,000
| +108% | +$6.2M |
|
766
iShares Russell 2000 ETF
IWM
$81.6B
| $12.6M | 0.01% |
+67,360
| New | +$12M |
|
767
CALL
argenx
ARGX
$53.3B
| $12.5M | 0.01% |
32,200
+21,600
| +204% | +$8.5M |
|
768
CALL
Advance Auto Parts
AAP
$3.35B
| $12.5M | 0.01% |
178,100
+49,000
| +38% | +$5.04M |
|
769
CALL
Cadence Design Systems
CDNS
$93B
| $12.5M | 0.01% |
53,300
+5,100
| +11% | +$1.11M |
|
770
CALL
International Flavors & Fragrances
IFF
$19.7B
| $12.5M | 0.01% |
157,000
+8,900
| +6% | +$766K |
|
771
CALL
Jabil
JBL
$33.4B
| $12.5M | 0.01% |
115,700
+100,000
| +637% | +$8.81M |
|
772
CALL
Dropbox
DBX
$6.69B
| $12.5M | 0.01% |
468,100
-136,100
| -23% | -$3.1M |
|
|
X
773
CALL
DELISTED
US Steel
X
| $12.5M | 0.01% |
498,800
-144,700
| -22% | -$3.37M |
|
774
CALL
AGNC Investment
AGNC
$12.5B
| $12.5M | 0.01% |
1,230,000
+779,800
| +173% | +$7.58M |
|
|
FITB
775
CALL
Fifth Third Bancorp
FITB
$52.3B
| $12.5M | 0.01% |
475,100
-140,500
| -23% | -$3.62M |
|
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.