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 | |
|---|---|---|---|---|---|---|
4676
PUT
Telesat
TSAT
$570M
| $143K | ﹤0.01% |
7,600
+500
| +7% | +$9.54K |
|
4677
CALL
Advanced Energy
AEIS
$11B
| $142K | ﹤0.01% |
1,500
-1,800
| -55% | -$206K |
|
4678
PUT
Atomera
ATOM
$197M
| $142K | ﹤0.01% |
35,600
+29,500
| +484% | +$230K |
|
4679
CALL
CMS Energy
CMS
$22.7B
| $142K | ﹤0.01% |
1,900
-600
| -24% | -$41.9K |
|
4680
PUT
CapForce IBD 50 ETF
FFTY
$80.3M
| $142K | ﹤0.01% |
+5,300
| New | +$155K |
|
|
GTY
4681
Getty Realty Corp
GTY
$2.12B
| $142K | ﹤0.01% |
+4,556
| New | +$140K |
|
4682
CALL
Vericel Corp
VCEL
$2.43B
| $142K | ﹤0.01% |
3,200
-200
| -6% | -$10.8K |
|
|
SAIL
4683
SailPoint Inc
SAIL
$9.17B
| $142K | ﹤0.01% |
+7,626
| New | +$166K |
|
4684
CALL
AMN Healthcare
AMN
$1.35B
| $141K | ﹤0.01% |
5,800
+500
| +9% | +$12.8K |
|
4685
CALL
Dine Brands
DIN
$457M
| $141K | ﹤0.01% |
6,100
+4,800
| +369% | +$129K |
|
|
DX
4686
CALL
Dynex Capital
DX
$3.18B
| $141K | ﹤0.01% |
10,900
-3,200
| -23% | -$42.9K |
|
4687
Getty Images
GETY
$158M
| $141K | ﹤0.01% |
+81,858
| New | +$195K |
|
4688
CALL
HighPeak Energy
HPK
$838M
| $141K | ﹤0.01% |
11,200
+5,900
| +111% | +$79.3K |
|
4689
Iovance Biotherapeutics
IOVA
$2.09B
| $141K | ﹤0.01% |
42,564
-27,889
| -40% | -$144K |
|
|
LX
4690
LexinFintech Holdings
LX
$246M
| $141K | ﹤0.01% |
13,989
-19,013
| -58% | -$159K |
|
4691
Invesco Water Resources ETF
PHO
$2B
| $141K | ﹤0.01% |
2,199
+1,065
| +94% | +$70.9K |
|
|
SF
4692
CALL
Stifel
SF
$12.5B
| $141K | ﹤0.01% |
2,250
-2,550
| -53% | -$180K |
|
4693
CALL
Sundial Growers
SNDL
$325M
| $141K | ﹤0.01% |
100,700
-137,400
| -58% | -$233K |
|
4694
CALL
Simpson Manufacturing
SSD
$7.68B
| $141K | ﹤0.01% |
900
-1,600
| -64% | -$263K |
|
|
TERN
4695
CALL
DELISTED
Terns Pharmaceuticals
TERN
| $141K | ﹤0.01% |
51,400
+8,600
| +20% | +$35.1K |
|
4696
PUT
Butterfly Network
BFLY
$2.14B
| $140K | ﹤0.01% |
61,600
+7,000
| +13% | +$25K |
|
4697
Extreme Networks
EXTR
$3.9B
| $140K | ﹤0.01% |
10,596
+1,326
| +14% | +$20.8K |
|
4698
CALL
The Honest Company
HNST
$409M
| $140K | ﹤0.01% |
29,900
-1,200
| -4% | -$6.88K |
|
4699
Phathom Pharmaceuticals
PHAT
$720M
| $140K | ﹤0.01% |
22,474
+17,079
| +317% | +$104K |
|
4700
CALL
TriplePoint Venture Growth BDC
TPVG
$185M
| $140K | ﹤0.01% |
20,200
+9,700
| +92% | +$74.1K |
|
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.