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 | |
|---|---|---|---|---|---|---|
726
PUT
Kroger
KR
$35.3B
| $13.8M | 0.01% |
293,500
+16,800
| +6% | +$801K |
|
727
PUT
Allegro MicroSystems
ALGM
$9.29B
| $13.8M | 0.01% |
304,900
+285,100
| +1,440% | +$11.5M |
|
728
CALL
Dick's Sporting Goods
DKS
$18.8B
| $13.8M | 0.01% |
104,100
-83,900
| -45% | -$11.5M |
|
729
CALL
Automatic Data Processing
ADP
$97.2B
| $13.7M | 0.01% |
62,500
-13,900
| -18% | -$3M |
|
730
PUT
General Mills
GIS
$19.7B
| $13.7M | 0.01% |
178,900
-198,000
| -53% | -$16.9M |
|
731
CALL
Vale
VALE
$63.2B
| $13.7M | 0.01% |
1,020,600
+25,500
| +3% | +$361K |
|
732
CALL
Mondelez International
MDLZ
$78.1B
| $13.7M | 0.01% |
187,700
-8,100
| -4% | -$598K |
|
733
CALL
Nutrien
NTR
$32.9B
| $13.7M | 0.01% |
231,600
-90,100
| -28% | -$5.73M |
|
734
CALL
S&P Global
SPGI
$127B
| $13.6M | 0.01% |
34,000
-1,000
| -3% | -$365K |
|
735
CALL
NetApp
NTAP
$32.6B
| $13.6M | 0.01% |
178,000
-90,400
| -34% | -$6.11M |
|
736
PUT
Tenet Healthcare
THC
$16.8B
| $13.6M | 0.01% |
167,100
+75,300
| +82% | +$5.36M |
|
737
PUT
PG&E
PCG
$39.9B
| $13.6M | 0.01% |
785,800
+126,900
| +19% | +$2.15M |
|
738
PUT
GSK
GSK
$102B
| $13.5M | 0.01% |
399,200
+39,300
| +11% | +$1.41M |
|
739
PUT
Macy's
M
$6.4B
| $13.5M | 0.01% |
842,400
-211,400
| -20% | -$3.38M |
|
|
KRTX
740
CALL
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $13.4M | 0.01% |
61,900
-15,400
| -20% | -$3.3M |
|
741
CALL
Dell
DELL
$285B
| $13.4M | 0.01% |
246,900
-100,100
| -29% | -$4.61M |
|
742
PUT
Norfolk Southern
NSC
$74.3B
| $13.3M | 0.01% |
58,800
-45,300
| -44% | -$9.62M |
|
743
CALL
Archer Daniels Midland
ADM
$42.1B
| $13.3M | 0.01% |
175,600
+14,300
| +9% | +$1.08M |
|
744
CALL
Western Digital
WDC
$192B
| $13.2M | 0.01% |
461,330
-408,807
| -47% | -$11.4M |
|
745
CALL
Nu Holdings
NU
$70.1B
| $13.2M | 0.01% |
1,668,900
+439,500
| +36% | +$2.7M |
|
746
CALL
AMC Entertainment Holdings
AMC
$2.01B
| $13.2M | 0.01% |
318,520
-148,990
| -32% | -$7.36M |
|
747
CALL
American International
AIG
$41.5B
| $13.1M | 0.01% |
228,200
-266,800
| -54% | -$14.3M |
|
748
CALL
Expedia Group
EXPE
$31.3B
| $13.1M | 0.01% |
119,700
-46,700
| -28% | -$4.58M |
|
749
PUT
W.W. Grainger
GWW
$63.9B
| $13.1M | 0.01% |
16,600
-33,400
| -67% | -$23M |
|
750
Spotify
SPOT
$97.5B
| $13.1M | 0.01% |
81,447
+69,461
| +580% | +$10.1M |
|
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.