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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
EB
3176
CALL
DELISTED
Eventbrite
EB
| $610K | ﹤0.01% |
289,200
+284,400
| +5,925% | +$854K |
|
|
LAC
3177
PUT
Lithium Americas
LAC
$1B
| $610K | ﹤0.01% |
225,200
-485,600
| -68% | -$1.46M |
|
|
TBCH
3178
Turtle Beach Corp
TBCH
$246M
| $610K | ﹤0.01% |
+42,768
| New | +$713K |
|
3179
PUT
Euronet Worldwide
EEFT
$3.02B
| $609K | ﹤0.01% |
5,700
-5,600
| -50% | -$568K |
|
3180
CALL
American Century Diversified Corporate Bond ETF
KORP
$871M
| $609K | ﹤0.01% |
7,100
+6,500
| +1,083% | +$301K |
|
3181
CALL
Ramaco Resources Class A
METC
$662M
| $609K | ﹤0.01% |
74,784
-24,175
| -24% | -$225K |
|
3182
PUT
Public Service Enterprise Group
PEG
$39.4B
| $609K | ﹤0.01% |
7,400
+1,000
| +16% | +$83.4K |
|
|
HIMX
3183
PUT
Himax Technologies
HIMX
$2.16B
| $608K | ﹤0.01% |
82,800
-49,800
| -38% | -$461K |
|
3184
CALL
Natural Gas Services Group
NGS
$468M
| $608K | ﹤0.01% |
27,700
-54,300
| -66% | -$1.37M |
|
3185
CALL
Simplify US Equity PLUS Convexity ETF
SPYC
$110M
| $608K | ﹤0.01% |
31,300
+10,200
| +48% | +$380K |
|
3186
PUT
The RealReal
REAL
$1.38B
| $607K | ﹤0.01% |
112,700
+41,000
| +57% | +$311K |
|
3187
CALL
Atmus Filtration Technologies
ATMU
$4.32B
| $606K | ﹤0.01% |
16,500
-4,000
| -20% | -$158K |
|
|
LGF.A
3188
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $606K | ﹤0.01% |
68,562
+3,318
| +5% | +$29.9K |
|
3189
CALL
Byrna Technologies
BYRN
$88.1M
| $604K | ﹤0.01% |
35,900
+31,800
| +776% | +$822K |
|
3190
PUT
SM Energy
SM
$7.38B
| $604K | ﹤0.01% |
20,200
-5,400
| -21% | -$194K |
|
|
SMLR
3191
PUT
DELISTED
Semler Scientific
SMLR
| $604K | ﹤0.01% |
16,700
-1,800
| -10% | -$84.3K |
|
3192
CALL
Bain Capital Specialty
BCSF
$817M
| $602K | ﹤0.01% |
36,300
+34,500
| +1,917% | +$608K |
|
3193
Hyatt Hotels
H
$17.9B
| $602K | ﹤0.01% |
+4,915
| New | +$707K |
|
|
VTLE
3194
CALL
DELISTED
Vital Energy
VTLE
| $602K | ﹤0.01% |
28,400
-142,700
| -83% | -$4.14M |
|
|
BPMC
3195
PUT
DELISTED
Blueprint Medicines
BPMC
| $601K | ﹤0.01% |
6,800
-7,600
| -53% | -$741K |
|
3196
Comfort Systems
FIX
$59.8B
| $601K | ﹤0.01% |
1,867
+787
| +73% | +$317K |
|
3197
CALL
Ternium
TX
$9.26B
| $601K | ﹤0.01% |
19,300
+15,600
| +422% | +$472K |
|
|
BBBY
3198
PUT
Bed Bath & Beyond
BBBY
$495M
| $600K | ﹤0.01% |
113,960
+82,390
| +261% | +$500K |
|
3199
PUT
Americold
COLD
$4.14B
| $600K | ﹤0.01% |
28,000
+16,600
| +146% | +$361K |
|
3200
TransAlta
TAC
$4.23B
| $599K | ﹤0.01% |
64,105
+35,745
| +126% | +$396K |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.