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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3701
CALL
i3 Verticals
IIIV
$420M
| $581K | ﹤0.01% |
25,400
+24,200
| +2,017% | +$503K |
|
3702
PUT
Intuitive Machines
LUNR
$1.98B
| $581K | ﹤0.01% |
+93,000
| New | +$442K |
|
|
BASE
3703
DELISTED
Couchbase
BASE
| $580K | ﹤0.01% |
22,078
-353
| -2% | -$9.18K |
|
3704
Sundial Growers
SNDL
$318M
| $580K | ﹤0.01% |
289,555
-9,322
| -3% | -$13.6K |
|
|
VRN
3705
PUT
DELISTED
Veren
VRN
| $580K | ﹤0.01% |
70,900
+18,800
| +36% | +$132K |
|
3706
CALL
FIGS
FIGS
$1.73B
| $579K | ﹤0.01% |
116,300
+35,000
| +43% | +$201K |
|
3707
PUT
Janux Therapeutics
JANX
$915M
| $579K | ﹤0.01% |
15,400
+15,200
| +7,600% | +$331K |
|
3708
PUT
MidCap Financial Investment
MFIC
$811M
| $579K | ﹤0.01% |
38,500
+38,100
| +9,525% | +$540K |
|
3709
Invesco CurrencyShares Australian Dollar Trust
FXA
$96.7M
| $578K | ﹤0.01% |
8,962
+8,534
| +1,994% | +$556K |
|
3710
CALL
Beazer Homes USA
BZH
$913M
| $577K | ﹤0.01% |
17,600
-25,500
| -59% | -$788K |
|
|
BZUN
3711
CALL
Baozun
BZUN
$168M
| $577K | ﹤0.01% |
251,000
-116,500
| -32% | -$279K |
|
3712
Ametek
AME
$55.3B
| $576K | ﹤0.01% |
3,154
+1,680
| +114% | +$289K |
|
3713
Vanguard World Funds Extended Duration ETF
EDV
$3.36B
| $576K | ﹤0.01% |
7,530
-10,608
| -58% | -$807K |
|
3714
CALL
Merit Medical Systems
MMSI
$4.67B
| $575K | ﹤0.01% |
7,600
-24,500
| -76% | -$1.89M |
|
3715
PUT
Bank of N.T. Butterfield & Son
NTB
$2.37B
| $575K | ﹤0.01% |
18,000
+17,800
| +8,900% | +$541K |
|
|
VERV
3716
PUT
DELISTED
Verve Therapeutics
VERV
| $575K | ﹤0.01% |
43,300
-8,100
| -16% | -$107K |
|
|
KEEL
3717
Keel Infrastructure Corp
KEEL
$2.25B
| $574K | ﹤0.01% |
257,777
+67,114
| +35% | +$174K |
|
|
MOMO
3718
PUT
Hello Group
MOMO
$869M
| $574K | ﹤0.01% |
92,500
+60,700
| +191% | +$385K |
|
3719
PUT
SFL Corp
SFL
$1.61B
| $574K | ﹤0.01% |
43,600
+15,300
| +54% | +$193K |
|
3720
Franklin Covey
FC
$248M
| $573K | ﹤0.01% |
+14,605
| New | +$582K |
|
3721
CALL
Howard Hughes
HHH
$4B
| $573K | ﹤0.01% |
8,287
+2,098
| +34% | +$156K |
|
|
SOND
3722
CALL
DELISTED
Sonder
SOND
| $573K | ﹤0.01% |
193,900
-60,300
| -24% | -$213K |
|
3723
Treace Medical Concepts
TMCI
$260M
| $573K | ﹤0.01% |
43,947
-23,403
| -35% | -$312K |
|
3724
Insmed
INSM
$22.6B
| $569K | ﹤0.01% |
+21,007
| New | +$588K |
|
3725
Roivant Sciences
ROIV
$24.3B
| $569K | ﹤0.01% |
54,030
-64,684
| -54% | -$697K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.