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 | |
|---|---|---|---|---|---|---|
6551
Ramaco Resources Class A
METC
$639M
| $37K | ﹤0.01% |
2,295
-18,569
| -89% | -$329K |
|
|
NUVL
6552
CALL
DELISTED
Nuvalent
NUVL
| $37K | ﹤0.01% |
500
-80,900
| -99% | -$6.44M |
|
|
OLPX
6553
PUT
DELISTED
Olaplex Holdings
OLPX
| $37K | ﹤0.01% |
19,700
+12,900
| +190% | +$26.9K |
|
6554
Pliant Therapeutics
PLRX
$65.6M
| $37K | ﹤0.01% |
2,522
-1,675
| -40% | -$27.6K |
|
6555
CALL
Rayonier Advanced Materials
RYAM
$604M
| $37K | ﹤0.01% |
7,800
-200
| -3% | -$851 |
|
6556
CALL
Scholar Rock
SRRK
$5.87B
| $37K | ﹤0.01% |
2,100
-9,000
| -81% | -$142K |
|
6557
Urban One Class A
UONE
$22.8M
| $37K | ﹤0.01% |
+1,395
| New | +$46.4K |
|
6558
PUT
Wheels Up
UP
$217M
| $37K | ﹤0.01% |
655
-85
| -11% | -$5.59K |
|
6559
CALL
Weave Communications
WEAV
$522M
| $37K | ﹤0.01% |
3,300
+2,600
| +371% | +$31.2K |
|
6560
PUT
Worthington Enterprises
WOR
$2.74B
| $37K | ﹤0.01% |
600
-3,600
| -86% | -$214K |
|
6561
CALL
Xometry
XMTR
$4.69B
| $37K | ﹤0.01% |
2,200
-12,000
| -85% | -$325K |
|
6562
CALL
Zentalis Pharmaceuticals
ZNTL
$350M
| $37K | ﹤0.01% |
2,400
-54,100
| -96% | -$744K |
|
|
NGMS
6563
CALL
DELISTED
NeoGames S.A. Ordinary Shares
NGMS
| $37K | ﹤0.01% |
1,300
+1,000
| +333% | +$28.3K |
|
|
IELG
6564
PUT
DELISTED
ISHARES ENHANCED U.S. LARGE CAP ETF
IELG
| $37K | ﹤0.01% |
1,500
-200
| -12% | -$4.93K |
|
6565
PUT
Alarm.com
ALRM
$2.68B
| $36K | ﹤0.01% |
500
+400
| +400% | +$27.2K |
|
6566
PUT
Atossa Therapeutics
ATOS
$21.8M
| $36K | ﹤0.01% |
1,367
-820
| -37% | -$13.2K |
|
6567
CALL
Axogen
AXGN
$2.2B
| $36K | ﹤0.01% |
4,500
+3,900
| +650% | +$34.9K |
|
|
SRTA
6568
PUT
Strata Critical Medical Inc
SRTA
$440M
| $36K | ﹤0.01% |
12,700
+11,500
| +958% | +$35.5K |
|
|
BRY
6569
PUT
DELISTED
Berry Corp
BRY
| $36K | ﹤0.01% |
4,500
-3,300
| -42% | -$23.1K |
|
6570
CALL
Compugen
CGEN
$220M
| $36K | ﹤0.01% |
14,100
+3,200
| +29% | +$7.45K |
|
|
CMPS
6571
Compass Pathways
CMPS
$1.56B
| $36K | ﹤0.01% |
4,334
-6,788
| -61% | -$68.4K |
|
6572
CALL
Delek Logistics
DKL
$3.14B
| $36K | ﹤0.01% |
900
+500
| +125% | +$21.9K |
|
6573
CALL
Enlivex Ltd
ENLV
$32.8M
| $36K | ﹤0.01% |
640
+540
| +540% | +$26.4K |
|
|
EPIX
6574
DELISTED
ESSA Pharma
EPIX
| $36K | ﹤0.01% |
4,329
+147
| +4% | +$1.28K |
|
6575
PUT
Evolution Petroleum
EPM
$131M
| $36K | ﹤0.01% |
5,900
-25,600
| -81% | -$147K |
|
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.