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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SUMO
2851
CALL
DELISTED
Sumo Logic, Inc. Common Stock
SUMO
| $758K | ﹤0.01% |
63,300
-42,600
| -40% | -$467K |
|
2852
PUT
F5
FFIV
$22.1B
| $757K | ﹤0.01% |
5,200
+4,400
| +550% | +$635K |
|
2853
CALL
Brighthouse Financial
BHF
$3.63B
| $754K | ﹤0.01% |
17,100
+14,200
| +490% | +$746K |
|
2854
PUT
NNN REIT
NNN
$9.39B
| $754K | ﹤0.01% |
17,100
+12,100
| +242% | +$551K |
|
2855
CALL
New York Times
NYT
$11.6B
| $754K | ﹤0.01% |
19,400
-3,400
| -15% | -$125K |
|
|
TGNA
2856
PUT
DELISTED
TEGNA Inc
TGNA
| $754K | ﹤0.01% |
44,600
+600
| +1% | +$11.2K |
|
|
BKI
2857
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $754K | ﹤0.01% |
13,100
+12,000
| +1,091% | +$718K |
|
2858
PUT
Flowserve
FLS
$9.25B
| $751K | ﹤0.01% |
22,100
+21,600
| +4,320% | +$723K |
|
|
AKTS
2859
DELISTED
Akoustis Technologies Inc
AKTS
| $751K | ﹤0.01% |
243,881
+222,188
| +1,024% | +$775K |
|
2860
CALL
Red Rock Resorts
RRR
$3.74B
| $748K | ﹤0.01% |
16,800
-4,400
| -21% | -$195K |
|
2861
CALL
Vanguard S&P 500 Growth ETF
VOOG
$25.4B
| $748K | ﹤0.01% |
29,400
+16,200
| +123% | +$595K |
|
2862
CALL
Middleby
MIDD
$6.05B
| $747K | ﹤0.01% |
5,100
+3,400
| +200% | +$505K |
|
2863
PUT
indie Semiconductor
INDI
$733M
| $746K | ﹤0.01% |
70,800
+65,800
| +1,316% | +$588K |
|
|
AL
2864
PUT
DELISTED
Air Lease Corp
AL
| $744K | ﹤0.01% |
18,900
+18,600
| +6,200% | +$778K |
|
|
GOLD
2865
CALL
Gold.com Inc
GOLD
$1.14B
| $744K | ﹤0.01% |
21,500
+11,300
| +111% | +$376K |
|
2866
CALL
FNB Corp
FNB
$6.78B
| $744K | ﹤0.01% |
64,200
-30,800
| -32% | -$411K |
|
2867
CALL
Eversource Energy
ES
$28.2B
| $743K | ﹤0.01% |
9,500
+1,600
| +20% | +$126K |
|
2868
Honda
HMC
$36.5B
| $743K | ﹤0.01% |
+28,053
| New | +$704K |
|
2869
Perion Network
PERI
$367M
| $742K | ﹤0.01% |
18,755
+16,120
| +612% | +$537K |
|
2870
CALL
Credit Acceptance
CACC
$6B
| $741K | ﹤0.01% |
1,700
-400
| -19% | -$176K |
|
2871
CALL
Arvinas
ARVN
$518M
| $740K | ﹤0.01% |
27,100
+6,500
| +32% | +$205K |
|
2872
PUT
Boise Cascade
BCC
$2.74B
| $740K | ﹤0.01% |
11,700
+5,500
| +89% | +$381K |
|
2873
The GEO Group
GEO
$4.13B
| $739K | ﹤0.01% |
93,746
+46,647
| +99% | +$458K |
|
2874
PUT
Buckle
BKE
$2.19B
| $738K | ﹤0.01% |
20,700
-8,400
| -29% | -$344K |
|
|
LTC
2875
CALL
LTC Properties
LTC
$2.16B
| $737K | ﹤0.01% |
21,000
| – | – |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.